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4















According to palimpsest on my new OCZ Vertex 3 120 GB SSD, S.M.A.R.T. attribute ID 234 is




Uncorrectable ECC Count



Number of uncorrectable ECC errors




[Screenshot of <code>palimpsest</code> displaying SMART data on KDE]



I've been watching this value, and it has been increasing since it read 78.



Then, I ran smartctl -a /dev/sda and saw this:



ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
195 ECC_Uncorr_Error_Count 0x001c 120 120 000 Old_age Offline - 0/51803881
233 SandForce_Internal 0x0000 000 000 000 Old_age Offline - 51
234 SandForce_Internal 0x0032 000 000 000 Old_age Always - 135


It looks like OCZ assigned ID 234 as something else, and the uncorrectable errors by ECC are actually ID 195.



My question is...



What is SandForce_Internal for S.M.A.R.T. attributes 233 and 234?










share|improve this question





























    4















    According to palimpsest on my new OCZ Vertex 3 120 GB SSD, S.M.A.R.T. attribute ID 234 is




    Uncorrectable ECC Count



    Number of uncorrectable ECC errors




    [Screenshot of <code>palimpsest</code> displaying SMART data on KDE]



    I've been watching this value, and it has been increasing since it read 78.



    Then, I ran smartctl -a /dev/sda and saw this:



    ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
    195 ECC_Uncorr_Error_Count 0x001c 120 120 000 Old_age Offline - 0/51803881
    233 SandForce_Internal 0x0000 000 000 000 Old_age Offline - 51
    234 SandForce_Internal 0x0032 000 000 000 Old_age Always - 135


    It looks like OCZ assigned ID 234 as something else, and the uncorrectable errors by ECC are actually ID 195.



    My question is...



    What is SandForce_Internal for S.M.A.R.T. attributes 233 and 234?










    share|improve this question



























      4












      4








      4








      According to palimpsest on my new OCZ Vertex 3 120 GB SSD, S.M.A.R.T. attribute ID 234 is




      Uncorrectable ECC Count



      Number of uncorrectable ECC errors




      [Screenshot of <code>palimpsest</code> displaying SMART data on KDE]



      I've been watching this value, and it has been increasing since it read 78.



      Then, I ran smartctl -a /dev/sda and saw this:



      ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
      195 ECC_Uncorr_Error_Count 0x001c 120 120 000 Old_age Offline - 0/51803881
      233 SandForce_Internal 0x0000 000 000 000 Old_age Offline - 51
      234 SandForce_Internal 0x0032 000 000 000 Old_age Always - 135


      It looks like OCZ assigned ID 234 as something else, and the uncorrectable errors by ECC are actually ID 195.



      My question is...



      What is SandForce_Internal for S.M.A.R.T. attributes 233 and 234?










      share|improve this question
















      According to palimpsest on my new OCZ Vertex 3 120 GB SSD, S.M.A.R.T. attribute ID 234 is




      Uncorrectable ECC Count



      Number of uncorrectable ECC errors




      [Screenshot of <code>palimpsest</code> displaying SMART data on KDE]



      I've been watching this value, and it has been increasing since it read 78.



      Then, I ran smartctl -a /dev/sda and saw this:



      ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
      195 ECC_Uncorr_Error_Count 0x001c 120 120 000 Old_age Offline - 0/51803881
      233 SandForce_Internal 0x0000 000 000 000 Old_age Offline - 51
      234 SandForce_Internal 0x0032 000 000 000 Old_age Always - 135


      It looks like OCZ assigned ID 234 as something else, and the uncorrectable errors by ECC are actually ID 195.



      My question is...



      What is SandForce_Internal for S.M.A.R.T. attributes 233 and 234?







      ssd smart






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Sep 17 '12 at 21:53







      Deltik

















      asked Sep 15 '12 at 20:46









      DeltikDeltik

      13.2k144887




      13.2k144887






















          3 Answers
          3






          active

          oldest

          votes


















          6














          It has been a while since this question was first asked, but it's still relevant, because this info is still a little tough to track down on the web, so here is a little more info.



          I have these same two mystery SMART attributes on my Kingston HyperX Fury, which uses the Sandforce SF-2281 controller.



          As already stated, these two numbers track "Host Writes" (234) and "NAND Writes" (233).



          These SMART attributes keep track of the wear level on the SSD's Flash memory by recording how much data has been written to the drive.



          The reason that two different attributes are needed, is because the SandForce 2000 series controllers try to maximize the life of the Flash Memory by applying "Durawrite" data compression to the data your operating system sends to the hard drive BEFORE it writes it to the actually Flash Memory.



          Then when your O.S. reads the data, the controller transparently decompresses the data so that bit-for-bit it is identical to the original.



          The reason they do this is that by compressing the data stored on the drive, they can write fewer bytes to the Flash Memory over the life of the drive, which causes less wear and tear and makes the Flash Memory Chips last longer.



          ... but not ALL data is compressible, so sometimes "Durawrite" compression is really effective, and sometimes not so much, so these two attributes keep track of how much benefit you are getting from the compression.



          Here's how they work...



          The HOST Writes (attribute 234 on my Fury) duplicates the "LBAs written" attribute (241 decimal on my Fury SSD) and returns the same value, which just keeps track of the TOTAL amount of data, in Gigabytes, that your Operating System has written to the SSD during its full life since first installed.



          "NAND Writes" (attribute 233), shows how effective "Durawrite" was at compressing the data by showing the TOTAL number of Gigabytes of data that was ACTUALLY WRITTEN (after compression) to the NAND Flash Memory.



          Normally the "NAND Writes" will be smaller than "HOST Writes" with the ratio being controlled by how compressible the data you store on your hard drive is. Things like your browser cache (HTML) compress really well, but already compressed formats like ZIPPED data, JPGs, MP3s, and H264 or MPG video don't compress much at all because they are already highly compressed, so if the drive is used mainly to store that kind of data, HOST Writes and NAND Writes will be almost the same.



          Remember BOTH numbers are in Gigabytes, and neither one is associated with a problem of any kind, they just help you keep track of total SSD usage. With 3K cycle Flash chips a 240 Gigabyte HyperX Fury 3K can survive more than 700 terabytes of total writes (700,000 Gigabytes) even for non-compressible data.






          share|improve this answer



















          • 1





            I have a Kingston SV300S37A60G (60GB) that I use as root drive on a server. Little writes, mostly logs, and some package update (it's not linux, not many updates). After 22k hours of use, my 177 Wear_Range_Delta is 7 (an average of 7 writes per cell), the 233 Sandforce_internal is 9092 and both 234 Sandforce_Internal and 241 Lifetime_Writes_GiB are 5161. Value 242 Lifetime_Reads_GiB is lower, 2329 (of course memory cache works well). In my case according to your explanation I have almost twice NAND writes compared to host writes??? that's strange.

            – FarO
            Oct 16 '15 at 14:42











          • @OlafM: I have exactly the same situation on a Corsair Force 3 120GB one. My current guess is: The data used on the device isn't compressible and the device needed for writes due to garbage collection/reordering. But really, I don't know.

            – Elrond
            Jan 24 '16 at 20:22



















          4














          The SandForce_Internal attributes correspond to Host writes and NAND writes, with the larger value being Host writes. Host writes is the amount of data the controller was told to write whereas the NAND writes represents the amount of data the controller actually wrote.






          share|improve this answer
























          • Could you elaborate on your answer and clarify what units the values are measured in? And I just checked the values for attributes 233 and 234 again. Their values are now 798 and 586, respectively. The larger value now belongs to attribute 233. What does this mean?

            – Deltik
            Nov 15 '12 at 23:05



















          0














          SmartCtrl values:




          -v 233,raw48,SandForce_NANDWrite_GiB
          -v 234,raw48,SandForce_HostWrite_GiB
          -v 241,raw48,Lifetime_Writes_GiB
          -v 242,raw48,Lifetime_Reads_GiB



          All are measured in GiB units (you'll see that internal attribute 234 reports the same value as the common attribute 241).



          The current sources of the smartctrl tool currently does not name these 233 and 234 attributes and uses "SandForce_Internal" instead.



          This could be fixed in its "drivedb.h" database file (which uses a partial declaration without the header/footers hidden in /*comments*/, to make it embeddable and parsable either as C/C++ or as JSON).



          Example of output (with smartctl -x):




          SMART Attributes Data Structure revision number: 10
          Vendor Specific SMART Attributes with Thresholds:
          ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
          1 Raw_Read_Error_Rate POSR-- 120 120 050 - 0/0
          5 Retired_Block_Count PO--CK 100 100 003 - 0
          9 Power_On_Hours_and_Msec -O--CK 083 083 000 - 15087h+46m+25.780s
          12 Power_Cycle_Count -O--CK 099 099 000 - 1074
          171 Program_Fail_Count -O--CK 000 000 000 - 0
          172 Erase_Fail_Count -O--CK 000 000 000 - 0
          174 Unexpect_Power_Loss_Ct ----CK 000 000 000 - 154
          177 Wear_Range_Delta ------ 000 000 000 - 5
          181 Program_Fail_Count -O--CK 000 000 000 - 0
          182 Erase_Fail_Count -O--CK 000 000 000 - 0
          187 Reported_Uncorrect -O--CK 100 100 000 - 0
          194 Temperature_Celsius -O---K 028 064 000 - 28 (Min/Max 16/64)
          195 ECC_Uncorr_Error_Count --SRC- 100 100 000 - 0/0
          196 Reallocated_Event_Count PO--CK 100 100 003 - 0
          201 Unc_Soft_Read_Err_Rate --SRC- 100 100 000 - 0/0
          204 Soft_ECC_Correct_Rate --SRC- 100 100 000 - 0/0
          230 Life_Curve_Status PO--C- 100 100 000 - 100
          231 SSD_Life_Left PO--C- 100 100 010 - 0
          233 SandForce_NANDWrite_GiB ------ 000 000 000 - 13821
          234 SandForce_HostWrite_GiB -O--CK 000 000 000 - 18743
          241 Lifetime_Writes_GiB -O--CK 000 000 000 - 18743
          242 Lifetime_Reads_GiB -O--CK 000 000 000 - 10313
          ||||||_ K auto-keep
          |||||__ C event count
          ||||___ R error rate
          |||____ S speed/performance
          ||_____ O updated online
          |______ P prefailure warning



          Note: that smartctl was initially a commandline Linux/Unix tool (GPL licenced) but it was ported natively and works perfectly on Windows (32-bit or 64-bit).
          It can be used via an UI interface, gsmartcontrol, also ported on Windows GPL licenced too).



          Both tools are in my opinion the best SMART tools on Windows, as it already captures in its active developement the patches, databases and tests already used by most wellknown harddrive and SSD manufacturers (Western Digital, Seagate, Samsung, Toshiba/Apple, Intel, Crucial, Kingston, Maxtor, Plextor, SanDisk, Transcend, HP, JMicron, SandForce, OCZ, Corsair, IBM/Lenovo/Hitachi, Fujitsu, InnoDisk, InnoStor, Dell, Quantum, LaCie...)






          share|improve this answer

























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            3 Answers
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            3 Answers
            3






            active

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            active

            oldest

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            active

            oldest

            votes









            6














            It has been a while since this question was first asked, but it's still relevant, because this info is still a little tough to track down on the web, so here is a little more info.



            I have these same two mystery SMART attributes on my Kingston HyperX Fury, which uses the Sandforce SF-2281 controller.



            As already stated, these two numbers track "Host Writes" (234) and "NAND Writes" (233).



            These SMART attributes keep track of the wear level on the SSD's Flash memory by recording how much data has been written to the drive.



            The reason that two different attributes are needed, is because the SandForce 2000 series controllers try to maximize the life of the Flash Memory by applying "Durawrite" data compression to the data your operating system sends to the hard drive BEFORE it writes it to the actually Flash Memory.



            Then when your O.S. reads the data, the controller transparently decompresses the data so that bit-for-bit it is identical to the original.



            The reason they do this is that by compressing the data stored on the drive, they can write fewer bytes to the Flash Memory over the life of the drive, which causes less wear and tear and makes the Flash Memory Chips last longer.



            ... but not ALL data is compressible, so sometimes "Durawrite" compression is really effective, and sometimes not so much, so these two attributes keep track of how much benefit you are getting from the compression.



            Here's how they work...



            The HOST Writes (attribute 234 on my Fury) duplicates the "LBAs written" attribute (241 decimal on my Fury SSD) and returns the same value, which just keeps track of the TOTAL amount of data, in Gigabytes, that your Operating System has written to the SSD during its full life since first installed.



            "NAND Writes" (attribute 233), shows how effective "Durawrite" was at compressing the data by showing the TOTAL number of Gigabytes of data that was ACTUALLY WRITTEN (after compression) to the NAND Flash Memory.



            Normally the "NAND Writes" will be smaller than "HOST Writes" with the ratio being controlled by how compressible the data you store on your hard drive is. Things like your browser cache (HTML) compress really well, but already compressed formats like ZIPPED data, JPGs, MP3s, and H264 or MPG video don't compress much at all because they are already highly compressed, so if the drive is used mainly to store that kind of data, HOST Writes and NAND Writes will be almost the same.



            Remember BOTH numbers are in Gigabytes, and neither one is associated with a problem of any kind, they just help you keep track of total SSD usage. With 3K cycle Flash chips a 240 Gigabyte HyperX Fury 3K can survive more than 700 terabytes of total writes (700,000 Gigabytes) even for non-compressible data.






            share|improve this answer



















            • 1





              I have a Kingston SV300S37A60G (60GB) that I use as root drive on a server. Little writes, mostly logs, and some package update (it's not linux, not many updates). After 22k hours of use, my 177 Wear_Range_Delta is 7 (an average of 7 writes per cell), the 233 Sandforce_internal is 9092 and both 234 Sandforce_Internal and 241 Lifetime_Writes_GiB are 5161. Value 242 Lifetime_Reads_GiB is lower, 2329 (of course memory cache works well). In my case according to your explanation I have almost twice NAND writes compared to host writes??? that's strange.

              – FarO
              Oct 16 '15 at 14:42











            • @OlafM: I have exactly the same situation on a Corsair Force 3 120GB one. My current guess is: The data used on the device isn't compressible and the device needed for writes due to garbage collection/reordering. But really, I don't know.

              – Elrond
              Jan 24 '16 at 20:22
















            6














            It has been a while since this question was first asked, but it's still relevant, because this info is still a little tough to track down on the web, so here is a little more info.



            I have these same two mystery SMART attributes on my Kingston HyperX Fury, which uses the Sandforce SF-2281 controller.



            As already stated, these two numbers track "Host Writes" (234) and "NAND Writes" (233).



            These SMART attributes keep track of the wear level on the SSD's Flash memory by recording how much data has been written to the drive.



            The reason that two different attributes are needed, is because the SandForce 2000 series controllers try to maximize the life of the Flash Memory by applying "Durawrite" data compression to the data your operating system sends to the hard drive BEFORE it writes it to the actually Flash Memory.



            Then when your O.S. reads the data, the controller transparently decompresses the data so that bit-for-bit it is identical to the original.



            The reason they do this is that by compressing the data stored on the drive, they can write fewer bytes to the Flash Memory over the life of the drive, which causes less wear and tear and makes the Flash Memory Chips last longer.



            ... but not ALL data is compressible, so sometimes "Durawrite" compression is really effective, and sometimes not so much, so these two attributes keep track of how much benefit you are getting from the compression.



            Here's how they work...



            The HOST Writes (attribute 234 on my Fury) duplicates the "LBAs written" attribute (241 decimal on my Fury SSD) and returns the same value, which just keeps track of the TOTAL amount of data, in Gigabytes, that your Operating System has written to the SSD during its full life since first installed.



            "NAND Writes" (attribute 233), shows how effective "Durawrite" was at compressing the data by showing the TOTAL number of Gigabytes of data that was ACTUALLY WRITTEN (after compression) to the NAND Flash Memory.



            Normally the "NAND Writes" will be smaller than "HOST Writes" with the ratio being controlled by how compressible the data you store on your hard drive is. Things like your browser cache (HTML) compress really well, but already compressed formats like ZIPPED data, JPGs, MP3s, and H264 or MPG video don't compress much at all because they are already highly compressed, so if the drive is used mainly to store that kind of data, HOST Writes and NAND Writes will be almost the same.



            Remember BOTH numbers are in Gigabytes, and neither one is associated with a problem of any kind, they just help you keep track of total SSD usage. With 3K cycle Flash chips a 240 Gigabyte HyperX Fury 3K can survive more than 700 terabytes of total writes (700,000 Gigabytes) even for non-compressible data.






            share|improve this answer



















            • 1





              I have a Kingston SV300S37A60G (60GB) that I use as root drive on a server. Little writes, mostly logs, and some package update (it's not linux, not many updates). After 22k hours of use, my 177 Wear_Range_Delta is 7 (an average of 7 writes per cell), the 233 Sandforce_internal is 9092 and both 234 Sandforce_Internal and 241 Lifetime_Writes_GiB are 5161. Value 242 Lifetime_Reads_GiB is lower, 2329 (of course memory cache works well). In my case according to your explanation I have almost twice NAND writes compared to host writes??? that's strange.

              – FarO
              Oct 16 '15 at 14:42











            • @OlafM: I have exactly the same situation on a Corsair Force 3 120GB one. My current guess is: The data used on the device isn't compressible and the device needed for writes due to garbage collection/reordering. But really, I don't know.

              – Elrond
              Jan 24 '16 at 20:22














            6












            6








            6







            It has been a while since this question was first asked, but it's still relevant, because this info is still a little tough to track down on the web, so here is a little more info.



            I have these same two mystery SMART attributes on my Kingston HyperX Fury, which uses the Sandforce SF-2281 controller.



            As already stated, these two numbers track "Host Writes" (234) and "NAND Writes" (233).



            These SMART attributes keep track of the wear level on the SSD's Flash memory by recording how much data has been written to the drive.



            The reason that two different attributes are needed, is because the SandForce 2000 series controllers try to maximize the life of the Flash Memory by applying "Durawrite" data compression to the data your operating system sends to the hard drive BEFORE it writes it to the actually Flash Memory.



            Then when your O.S. reads the data, the controller transparently decompresses the data so that bit-for-bit it is identical to the original.



            The reason they do this is that by compressing the data stored on the drive, they can write fewer bytes to the Flash Memory over the life of the drive, which causes less wear and tear and makes the Flash Memory Chips last longer.



            ... but not ALL data is compressible, so sometimes "Durawrite" compression is really effective, and sometimes not so much, so these two attributes keep track of how much benefit you are getting from the compression.



            Here's how they work...



            The HOST Writes (attribute 234 on my Fury) duplicates the "LBAs written" attribute (241 decimal on my Fury SSD) and returns the same value, which just keeps track of the TOTAL amount of data, in Gigabytes, that your Operating System has written to the SSD during its full life since first installed.



            "NAND Writes" (attribute 233), shows how effective "Durawrite" was at compressing the data by showing the TOTAL number of Gigabytes of data that was ACTUALLY WRITTEN (after compression) to the NAND Flash Memory.



            Normally the "NAND Writes" will be smaller than "HOST Writes" with the ratio being controlled by how compressible the data you store on your hard drive is. Things like your browser cache (HTML) compress really well, but already compressed formats like ZIPPED data, JPGs, MP3s, and H264 or MPG video don't compress much at all because they are already highly compressed, so if the drive is used mainly to store that kind of data, HOST Writes and NAND Writes will be almost the same.



            Remember BOTH numbers are in Gigabytes, and neither one is associated with a problem of any kind, they just help you keep track of total SSD usage. With 3K cycle Flash chips a 240 Gigabyte HyperX Fury 3K can survive more than 700 terabytes of total writes (700,000 Gigabytes) even for non-compressible data.






            share|improve this answer













            It has been a while since this question was first asked, but it's still relevant, because this info is still a little tough to track down on the web, so here is a little more info.



            I have these same two mystery SMART attributes on my Kingston HyperX Fury, which uses the Sandforce SF-2281 controller.



            As already stated, these two numbers track "Host Writes" (234) and "NAND Writes" (233).



            These SMART attributes keep track of the wear level on the SSD's Flash memory by recording how much data has been written to the drive.



            The reason that two different attributes are needed, is because the SandForce 2000 series controllers try to maximize the life of the Flash Memory by applying "Durawrite" data compression to the data your operating system sends to the hard drive BEFORE it writes it to the actually Flash Memory.



            Then when your O.S. reads the data, the controller transparently decompresses the data so that bit-for-bit it is identical to the original.



            The reason they do this is that by compressing the data stored on the drive, they can write fewer bytes to the Flash Memory over the life of the drive, which causes less wear and tear and makes the Flash Memory Chips last longer.



            ... but not ALL data is compressible, so sometimes "Durawrite" compression is really effective, and sometimes not so much, so these two attributes keep track of how much benefit you are getting from the compression.



            Here's how they work...



            The HOST Writes (attribute 234 on my Fury) duplicates the "LBAs written" attribute (241 decimal on my Fury SSD) and returns the same value, which just keeps track of the TOTAL amount of data, in Gigabytes, that your Operating System has written to the SSD during its full life since first installed.



            "NAND Writes" (attribute 233), shows how effective "Durawrite" was at compressing the data by showing the TOTAL number of Gigabytes of data that was ACTUALLY WRITTEN (after compression) to the NAND Flash Memory.



            Normally the "NAND Writes" will be smaller than "HOST Writes" with the ratio being controlled by how compressible the data you store on your hard drive is. Things like your browser cache (HTML) compress really well, but already compressed formats like ZIPPED data, JPGs, MP3s, and H264 or MPG video don't compress much at all because they are already highly compressed, so if the drive is used mainly to store that kind of data, HOST Writes and NAND Writes will be almost the same.



            Remember BOTH numbers are in Gigabytes, and neither one is associated with a problem of any kind, they just help you keep track of total SSD usage. With 3K cycle Flash chips a 240 Gigabyte HyperX Fury 3K can survive more than 700 terabytes of total writes (700,000 Gigabytes) even for non-compressible data.







            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered Jan 5 '15 at 1:24









            richrich

            7611




            7611








            • 1





              I have a Kingston SV300S37A60G (60GB) that I use as root drive on a server. Little writes, mostly logs, and some package update (it's not linux, not many updates). After 22k hours of use, my 177 Wear_Range_Delta is 7 (an average of 7 writes per cell), the 233 Sandforce_internal is 9092 and both 234 Sandforce_Internal and 241 Lifetime_Writes_GiB are 5161. Value 242 Lifetime_Reads_GiB is lower, 2329 (of course memory cache works well). In my case according to your explanation I have almost twice NAND writes compared to host writes??? that's strange.

              – FarO
              Oct 16 '15 at 14:42











            • @OlafM: I have exactly the same situation on a Corsair Force 3 120GB one. My current guess is: The data used on the device isn't compressible and the device needed for writes due to garbage collection/reordering. But really, I don't know.

              – Elrond
              Jan 24 '16 at 20:22














            • 1





              I have a Kingston SV300S37A60G (60GB) that I use as root drive on a server. Little writes, mostly logs, and some package update (it's not linux, not many updates). After 22k hours of use, my 177 Wear_Range_Delta is 7 (an average of 7 writes per cell), the 233 Sandforce_internal is 9092 and both 234 Sandforce_Internal and 241 Lifetime_Writes_GiB are 5161. Value 242 Lifetime_Reads_GiB is lower, 2329 (of course memory cache works well). In my case according to your explanation I have almost twice NAND writes compared to host writes??? that's strange.

              – FarO
              Oct 16 '15 at 14:42











            • @OlafM: I have exactly the same situation on a Corsair Force 3 120GB one. My current guess is: The data used on the device isn't compressible and the device needed for writes due to garbage collection/reordering. But really, I don't know.

              – Elrond
              Jan 24 '16 at 20:22








            1




            1





            I have a Kingston SV300S37A60G (60GB) that I use as root drive on a server. Little writes, mostly logs, and some package update (it's not linux, not many updates). After 22k hours of use, my 177 Wear_Range_Delta is 7 (an average of 7 writes per cell), the 233 Sandforce_internal is 9092 and both 234 Sandforce_Internal and 241 Lifetime_Writes_GiB are 5161. Value 242 Lifetime_Reads_GiB is lower, 2329 (of course memory cache works well). In my case according to your explanation I have almost twice NAND writes compared to host writes??? that's strange.

            – FarO
            Oct 16 '15 at 14:42





            I have a Kingston SV300S37A60G (60GB) that I use as root drive on a server. Little writes, mostly logs, and some package update (it's not linux, not many updates). After 22k hours of use, my 177 Wear_Range_Delta is 7 (an average of 7 writes per cell), the 233 Sandforce_internal is 9092 and both 234 Sandforce_Internal and 241 Lifetime_Writes_GiB are 5161. Value 242 Lifetime_Reads_GiB is lower, 2329 (of course memory cache works well). In my case according to your explanation I have almost twice NAND writes compared to host writes??? that's strange.

            – FarO
            Oct 16 '15 at 14:42













            @OlafM: I have exactly the same situation on a Corsair Force 3 120GB one. My current guess is: The data used on the device isn't compressible and the device needed for writes due to garbage collection/reordering. But really, I don't know.

            – Elrond
            Jan 24 '16 at 20:22





            @OlafM: I have exactly the same situation on a Corsair Force 3 120GB one. My current guess is: The data used on the device isn't compressible and the device needed for writes due to garbage collection/reordering. But really, I don't know.

            – Elrond
            Jan 24 '16 at 20:22













            4














            The SandForce_Internal attributes correspond to Host writes and NAND writes, with the larger value being Host writes. Host writes is the amount of data the controller was told to write whereas the NAND writes represents the amount of data the controller actually wrote.






            share|improve this answer
























            • Could you elaborate on your answer and clarify what units the values are measured in? And I just checked the values for attributes 233 and 234 again. Their values are now 798 and 586, respectively. The larger value now belongs to attribute 233. What does this mean?

              – Deltik
              Nov 15 '12 at 23:05
















            4














            The SandForce_Internal attributes correspond to Host writes and NAND writes, with the larger value being Host writes. Host writes is the amount of data the controller was told to write whereas the NAND writes represents the amount of data the controller actually wrote.






            share|improve this answer
























            • Could you elaborate on your answer and clarify what units the values are measured in? And I just checked the values for attributes 233 and 234 again. Their values are now 798 and 586, respectively. The larger value now belongs to attribute 233. What does this mean?

              – Deltik
              Nov 15 '12 at 23:05














            4












            4








            4







            The SandForce_Internal attributes correspond to Host writes and NAND writes, with the larger value being Host writes. Host writes is the amount of data the controller was told to write whereas the NAND writes represents the amount of data the controller actually wrote.






            share|improve this answer













            The SandForce_Internal attributes correspond to Host writes and NAND writes, with the larger value being Host writes. Host writes is the amount of data the controller was told to write whereas the NAND writes represents the amount of data the controller actually wrote.







            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered Nov 15 '12 at 17:19









            NunyoNunyo

            412




            412













            • Could you elaborate on your answer and clarify what units the values are measured in? And I just checked the values for attributes 233 and 234 again. Their values are now 798 and 586, respectively. The larger value now belongs to attribute 233. What does this mean?

              – Deltik
              Nov 15 '12 at 23:05



















            • Could you elaborate on your answer and clarify what units the values are measured in? And I just checked the values for attributes 233 and 234 again. Their values are now 798 and 586, respectively. The larger value now belongs to attribute 233. What does this mean?

              – Deltik
              Nov 15 '12 at 23:05

















            Could you elaborate on your answer and clarify what units the values are measured in? And I just checked the values for attributes 233 and 234 again. Their values are now 798 and 586, respectively. The larger value now belongs to attribute 233. What does this mean?

            – Deltik
            Nov 15 '12 at 23:05





            Could you elaborate on your answer and clarify what units the values are measured in? And I just checked the values for attributes 233 and 234 again. Their values are now 798 and 586, respectively. The larger value now belongs to attribute 233. What does this mean?

            – Deltik
            Nov 15 '12 at 23:05











            0














            SmartCtrl values:




            -v 233,raw48,SandForce_NANDWrite_GiB
            -v 234,raw48,SandForce_HostWrite_GiB
            -v 241,raw48,Lifetime_Writes_GiB
            -v 242,raw48,Lifetime_Reads_GiB



            All are measured in GiB units (you'll see that internal attribute 234 reports the same value as the common attribute 241).



            The current sources of the smartctrl tool currently does not name these 233 and 234 attributes and uses "SandForce_Internal" instead.



            This could be fixed in its "drivedb.h" database file (which uses a partial declaration without the header/footers hidden in /*comments*/, to make it embeddable and parsable either as C/C++ or as JSON).



            Example of output (with smartctl -x):




            SMART Attributes Data Structure revision number: 10
            Vendor Specific SMART Attributes with Thresholds:
            ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
            1 Raw_Read_Error_Rate POSR-- 120 120 050 - 0/0
            5 Retired_Block_Count PO--CK 100 100 003 - 0
            9 Power_On_Hours_and_Msec -O--CK 083 083 000 - 15087h+46m+25.780s
            12 Power_Cycle_Count -O--CK 099 099 000 - 1074
            171 Program_Fail_Count -O--CK 000 000 000 - 0
            172 Erase_Fail_Count -O--CK 000 000 000 - 0
            174 Unexpect_Power_Loss_Ct ----CK 000 000 000 - 154
            177 Wear_Range_Delta ------ 000 000 000 - 5
            181 Program_Fail_Count -O--CK 000 000 000 - 0
            182 Erase_Fail_Count -O--CK 000 000 000 - 0
            187 Reported_Uncorrect -O--CK 100 100 000 - 0
            194 Temperature_Celsius -O---K 028 064 000 - 28 (Min/Max 16/64)
            195 ECC_Uncorr_Error_Count --SRC- 100 100 000 - 0/0
            196 Reallocated_Event_Count PO--CK 100 100 003 - 0
            201 Unc_Soft_Read_Err_Rate --SRC- 100 100 000 - 0/0
            204 Soft_ECC_Correct_Rate --SRC- 100 100 000 - 0/0
            230 Life_Curve_Status PO--C- 100 100 000 - 100
            231 SSD_Life_Left PO--C- 100 100 010 - 0
            233 SandForce_NANDWrite_GiB ------ 000 000 000 - 13821
            234 SandForce_HostWrite_GiB -O--CK 000 000 000 - 18743
            241 Lifetime_Writes_GiB -O--CK 000 000 000 - 18743
            242 Lifetime_Reads_GiB -O--CK 000 000 000 - 10313
            ||||||_ K auto-keep
            |||||__ C event count
            ||||___ R error rate
            |||____ S speed/performance
            ||_____ O updated online
            |______ P prefailure warning



            Note: that smartctl was initially a commandline Linux/Unix tool (GPL licenced) but it was ported natively and works perfectly on Windows (32-bit or 64-bit).
            It can be used via an UI interface, gsmartcontrol, also ported on Windows GPL licenced too).



            Both tools are in my opinion the best SMART tools on Windows, as it already captures in its active developement the patches, databases and tests already used by most wellknown harddrive and SSD manufacturers (Western Digital, Seagate, Samsung, Toshiba/Apple, Intel, Crucial, Kingston, Maxtor, Plextor, SanDisk, Transcend, HP, JMicron, SandForce, OCZ, Corsair, IBM/Lenovo/Hitachi, Fujitsu, InnoDisk, InnoStor, Dell, Quantum, LaCie...)






            share|improve this answer






























              0














              SmartCtrl values:




              -v 233,raw48,SandForce_NANDWrite_GiB
              -v 234,raw48,SandForce_HostWrite_GiB
              -v 241,raw48,Lifetime_Writes_GiB
              -v 242,raw48,Lifetime_Reads_GiB



              All are measured in GiB units (you'll see that internal attribute 234 reports the same value as the common attribute 241).



              The current sources of the smartctrl tool currently does not name these 233 and 234 attributes and uses "SandForce_Internal" instead.



              This could be fixed in its "drivedb.h" database file (which uses a partial declaration without the header/footers hidden in /*comments*/, to make it embeddable and parsable either as C/C++ or as JSON).



              Example of output (with smartctl -x):




              SMART Attributes Data Structure revision number: 10
              Vendor Specific SMART Attributes with Thresholds:
              ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
              1 Raw_Read_Error_Rate POSR-- 120 120 050 - 0/0
              5 Retired_Block_Count PO--CK 100 100 003 - 0
              9 Power_On_Hours_and_Msec -O--CK 083 083 000 - 15087h+46m+25.780s
              12 Power_Cycle_Count -O--CK 099 099 000 - 1074
              171 Program_Fail_Count -O--CK 000 000 000 - 0
              172 Erase_Fail_Count -O--CK 000 000 000 - 0
              174 Unexpect_Power_Loss_Ct ----CK 000 000 000 - 154
              177 Wear_Range_Delta ------ 000 000 000 - 5
              181 Program_Fail_Count -O--CK 000 000 000 - 0
              182 Erase_Fail_Count -O--CK 000 000 000 - 0
              187 Reported_Uncorrect -O--CK 100 100 000 - 0
              194 Temperature_Celsius -O---K 028 064 000 - 28 (Min/Max 16/64)
              195 ECC_Uncorr_Error_Count --SRC- 100 100 000 - 0/0
              196 Reallocated_Event_Count PO--CK 100 100 003 - 0
              201 Unc_Soft_Read_Err_Rate --SRC- 100 100 000 - 0/0
              204 Soft_ECC_Correct_Rate --SRC- 100 100 000 - 0/0
              230 Life_Curve_Status PO--C- 100 100 000 - 100
              231 SSD_Life_Left PO--C- 100 100 010 - 0
              233 SandForce_NANDWrite_GiB ------ 000 000 000 - 13821
              234 SandForce_HostWrite_GiB -O--CK 000 000 000 - 18743
              241 Lifetime_Writes_GiB -O--CK 000 000 000 - 18743
              242 Lifetime_Reads_GiB -O--CK 000 000 000 - 10313
              ||||||_ K auto-keep
              |||||__ C event count
              ||||___ R error rate
              |||____ S speed/performance
              ||_____ O updated online
              |______ P prefailure warning



              Note: that smartctl was initially a commandline Linux/Unix tool (GPL licenced) but it was ported natively and works perfectly on Windows (32-bit or 64-bit).
              It can be used via an UI interface, gsmartcontrol, also ported on Windows GPL licenced too).



              Both tools are in my opinion the best SMART tools on Windows, as it already captures in its active developement the patches, databases and tests already used by most wellknown harddrive and SSD manufacturers (Western Digital, Seagate, Samsung, Toshiba/Apple, Intel, Crucial, Kingston, Maxtor, Plextor, SanDisk, Transcend, HP, JMicron, SandForce, OCZ, Corsair, IBM/Lenovo/Hitachi, Fujitsu, InnoDisk, InnoStor, Dell, Quantum, LaCie...)






              share|improve this answer




























                0












                0








                0







                SmartCtrl values:




                -v 233,raw48,SandForce_NANDWrite_GiB
                -v 234,raw48,SandForce_HostWrite_GiB
                -v 241,raw48,Lifetime_Writes_GiB
                -v 242,raw48,Lifetime_Reads_GiB



                All are measured in GiB units (you'll see that internal attribute 234 reports the same value as the common attribute 241).



                The current sources of the smartctrl tool currently does not name these 233 and 234 attributes and uses "SandForce_Internal" instead.



                This could be fixed in its "drivedb.h" database file (which uses a partial declaration without the header/footers hidden in /*comments*/, to make it embeddable and parsable either as C/C++ or as JSON).



                Example of output (with smartctl -x):




                SMART Attributes Data Structure revision number: 10
                Vendor Specific SMART Attributes with Thresholds:
                ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
                1 Raw_Read_Error_Rate POSR-- 120 120 050 - 0/0
                5 Retired_Block_Count PO--CK 100 100 003 - 0
                9 Power_On_Hours_and_Msec -O--CK 083 083 000 - 15087h+46m+25.780s
                12 Power_Cycle_Count -O--CK 099 099 000 - 1074
                171 Program_Fail_Count -O--CK 000 000 000 - 0
                172 Erase_Fail_Count -O--CK 000 000 000 - 0
                174 Unexpect_Power_Loss_Ct ----CK 000 000 000 - 154
                177 Wear_Range_Delta ------ 000 000 000 - 5
                181 Program_Fail_Count -O--CK 000 000 000 - 0
                182 Erase_Fail_Count -O--CK 000 000 000 - 0
                187 Reported_Uncorrect -O--CK 100 100 000 - 0
                194 Temperature_Celsius -O---K 028 064 000 - 28 (Min/Max 16/64)
                195 ECC_Uncorr_Error_Count --SRC- 100 100 000 - 0/0
                196 Reallocated_Event_Count PO--CK 100 100 003 - 0
                201 Unc_Soft_Read_Err_Rate --SRC- 100 100 000 - 0/0
                204 Soft_ECC_Correct_Rate --SRC- 100 100 000 - 0/0
                230 Life_Curve_Status PO--C- 100 100 000 - 100
                231 SSD_Life_Left PO--C- 100 100 010 - 0
                233 SandForce_NANDWrite_GiB ------ 000 000 000 - 13821
                234 SandForce_HostWrite_GiB -O--CK 000 000 000 - 18743
                241 Lifetime_Writes_GiB -O--CK 000 000 000 - 18743
                242 Lifetime_Reads_GiB -O--CK 000 000 000 - 10313
                ||||||_ K auto-keep
                |||||__ C event count
                ||||___ R error rate
                |||____ S speed/performance
                ||_____ O updated online
                |______ P prefailure warning



                Note: that smartctl was initially a commandline Linux/Unix tool (GPL licenced) but it was ported natively and works perfectly on Windows (32-bit or 64-bit).
                It can be used via an UI interface, gsmartcontrol, also ported on Windows GPL licenced too).



                Both tools are in my opinion the best SMART tools on Windows, as it already captures in its active developement the patches, databases and tests already used by most wellknown harddrive and SSD manufacturers (Western Digital, Seagate, Samsung, Toshiba/Apple, Intel, Crucial, Kingston, Maxtor, Plextor, SanDisk, Transcend, HP, JMicron, SandForce, OCZ, Corsair, IBM/Lenovo/Hitachi, Fujitsu, InnoDisk, InnoStor, Dell, Quantum, LaCie...)






                share|improve this answer















                SmartCtrl values:




                -v 233,raw48,SandForce_NANDWrite_GiB
                -v 234,raw48,SandForce_HostWrite_GiB
                -v 241,raw48,Lifetime_Writes_GiB
                -v 242,raw48,Lifetime_Reads_GiB



                All are measured in GiB units (you'll see that internal attribute 234 reports the same value as the common attribute 241).



                The current sources of the smartctrl tool currently does not name these 233 and 234 attributes and uses "SandForce_Internal" instead.



                This could be fixed in its "drivedb.h" database file (which uses a partial declaration without the header/footers hidden in /*comments*/, to make it embeddable and parsable either as C/C++ or as JSON).



                Example of output (with smartctl -x):




                SMART Attributes Data Structure revision number: 10
                Vendor Specific SMART Attributes with Thresholds:
                ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
                1 Raw_Read_Error_Rate POSR-- 120 120 050 - 0/0
                5 Retired_Block_Count PO--CK 100 100 003 - 0
                9 Power_On_Hours_and_Msec -O--CK 083 083 000 - 15087h+46m+25.780s
                12 Power_Cycle_Count -O--CK 099 099 000 - 1074
                171 Program_Fail_Count -O--CK 000 000 000 - 0
                172 Erase_Fail_Count -O--CK 000 000 000 - 0
                174 Unexpect_Power_Loss_Ct ----CK 000 000 000 - 154
                177 Wear_Range_Delta ------ 000 000 000 - 5
                181 Program_Fail_Count -O--CK 000 000 000 - 0
                182 Erase_Fail_Count -O--CK 000 000 000 - 0
                187 Reported_Uncorrect -O--CK 100 100 000 - 0
                194 Temperature_Celsius -O---K 028 064 000 - 28 (Min/Max 16/64)
                195 ECC_Uncorr_Error_Count --SRC- 100 100 000 - 0/0
                196 Reallocated_Event_Count PO--CK 100 100 003 - 0
                201 Unc_Soft_Read_Err_Rate --SRC- 100 100 000 - 0/0
                204 Soft_ECC_Correct_Rate --SRC- 100 100 000 - 0/0
                230 Life_Curve_Status PO--C- 100 100 000 - 100
                231 SSD_Life_Left PO--C- 100 100 010 - 0
                233 SandForce_NANDWrite_GiB ------ 000 000 000 - 13821
                234 SandForce_HostWrite_GiB -O--CK 000 000 000 - 18743
                241 Lifetime_Writes_GiB -O--CK 000 000 000 - 18743
                242 Lifetime_Reads_GiB -O--CK 000 000 000 - 10313
                ||||||_ K auto-keep
                |||||__ C event count
                ||||___ R error rate
                |||____ S speed/performance
                ||_____ O updated online
                |______ P prefailure warning



                Note: that smartctl was initially a commandline Linux/Unix tool (GPL licenced) but it was ported natively and works perfectly on Windows (32-bit or 64-bit).
                It can be used via an UI interface, gsmartcontrol, also ported on Windows GPL licenced too).



                Both tools are in my opinion the best SMART tools on Windows, as it already captures in its active developement the patches, databases and tests already used by most wellknown harddrive and SSD manufacturers (Western Digital, Seagate, Samsung, Toshiba/Apple, Intel, Crucial, Kingston, Maxtor, Plextor, SanDisk, Transcend, HP, JMicron, SandForce, OCZ, Corsair, IBM/Lenovo/Hitachi, Fujitsu, InnoDisk, InnoStor, Dell, Quantum, LaCie...)







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited 18 hours ago

























                answered 19 hours ago









                verdy_pverdy_p

                20722




                20722






























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