How to tell double-density vs. high-density in 5.25" floppies? Announcing the arrival of...
Is it possible to ask for a hotel room without minibar/extra services?
Unexpected result with right shift after bitwise negation
How do I keep my slimes from escaping their pens?
Unable to start mainnet node docker container
What LEGO pieces have "real-world" functionality?
Are my PIs rude or am I just being too sensitive?
Why is "Captain Marvel" translated as male in Portugal?
Need a suitable toxic chemical for a murder plot in my novel
Why use gamma over alpha radiation?
What do you call a plan that's an alternative plan in case your initial plan fails?
How to say 'striped' in Latin
Blender game recording at the wrong time
What did Darwin mean by 'squib' here?
Can a non-EU citizen traveling with me come with me through the EU passport line?
Passing functions in C++
3 doors, three guards, one stone
How can players take actions together that are impossible otherwise?
Direct Experience of Meditation
Two different pronunciation of "понял"
When is phishing education going too far?
Mortgage adviser recommends a longer term than necessary combined with overpayments
How should I respond to a player wanting to catch a sword between their hands?
Windows 10: How to Lock (not sleep) laptop on lid close?
What was the last x86 CPU that did not have the x87 floating-point unit built in?
How to tell double-density vs. high-density in 5.25" floppies?
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)Are my 5.25" floppies dead?How can I use my 3.5” disk drive without having to insert a floppy in my 5.25” drive as well?Can a Double-Density Floppy drive be swapped out for a High-Density drive?Reading old 5.25" floppiesHow to backup old Mac (System 7) floppies?5.25 Floppy Disk Formatting
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box;
}
I recently found a box of old 5.25" floppies. Is there a way to tell the double-density (360K) 5.25" ones from the high-density (1.2M) ones when the disks do not have any markings? It looks like the DD ones have the hub ring in the centre—if you’ve seen one you know what I mean—and the HD ones don’t, but maybe I’m mistaken.
floppy
edited Sep 9 '15 at 16:28
JakeGould
32.8k10100142
asked Mar 7 '12 at 16:58
kinokijufkinokijuf
6,81284487
|
show 4 more comments
I recently found a box of old 5.25" floppies. Is there a way to tell the double-density (360K) 5.25" ones from the high-density (1.2M) ones when the disks do not have any markings? It looks like the DD ones have the hub ring in the centre—if you’ve seen one you know what I mean—and the HD ones don’t, but maybe I’m mistaken.
floppy
edited Sep 9 '15 at 16:28
JakeGould
32.8k10100142
asked Mar 7 '12 at 16:58
kinokijufkinokijuf
6,81284487
I vaguely recall that the 1.2M ones have a notch in the side, in addition to the write notch along the top.
– Daniel R Hicks
Mar 7 '12 at 17:09
@DanH You are talking about 3,5" floppies.
– kinokijuf
Mar 7 '12 at 17:50
There was something about the notches on the 1.2M 5.25" floppies. Maybe there was a second notch on the top or some such.
– Daniel R Hicks
Mar 8 '12 at 1:58
@DanH No, there isn’t. I have them to confirm.
– kinokijuf
Mar 8 '12 at 12:45
Well, maybe I'm thinking of 8" floppies. I definitely remember another notch -- made the diskette as flimsy as slice of Swiss cheese.
– Daniel R Hicks
Mar 8 '12 at 17:03
|
show 4 more comments
I recently found a box of old 5.25" floppies. Is there a way to tell the double-density (360K) 5.25" ones from the high-density (1.2M) ones when the disks do not have any markings? It looks like the DD ones have the hub ring in the centre—if you’ve seen one you know what I mean—and the HD ones don’t, but maybe I’m mistaken.
floppy
edited Sep 9 '15 at 16:28
JakeGould
32.8k10100142
asked Mar 7 '12 at 16:58
kinokijufkinokijuf
6,81284487
I recently found a box of old 5.25" floppies. Is there a way to tell the double-density (360K) 5.25" ones from the high-density (1.2M) ones when the disks do not have any markings? It looks like the DD ones have the hub ring in the centre—if you’ve seen one you know what I mean—and the HD ones don’t, but maybe I’m mistaken.
floppy
floppy
edited Sep 9 '15 at 16:28
JakeGould
32.8k10100142
asked Mar 7 '12 at 16:58
kinokijufkinokijuf
6,81284487
edited Sep 9 '15 at 16:28
JakeGould
32.8k10100142
asked Mar 7 '12 at 16:58
kinokijufkinokijuf
6,81284487
edited Sep 9 '15 at 16:28
JakeGould
32.8k10100142
edited Sep 9 '15 at 16:28
JakeGould
32.8k10100142
edited Sep 9 '15 at 16:28
JakeGould
32.8k10100142
32.8k10100142
asked Mar 7 '12 at 16:58
kinokijufkinokijuf
6,81284487
asked Mar 7 '12 at 16:58
kinokijufkinokijuf
6,81284487
asked Mar 7 '12 at 16:58
kinokijufkinokijuf
6,81284487
6,81284487
I vaguely recall that the 1.2M ones have a notch in the side, in addition to the write notch along the top.
– Daniel R Hicks
Mar 7 '12 at 17:09
@DanH You are talking about 3,5" floppies.
– kinokijuf
Mar 7 '12 at 17:50
There was something about the notches on the 1.2M 5.25" floppies. Maybe there was a second notch on the top or some such.
– Daniel R Hicks
Mar 8 '12 at 1:58
@DanH No, there isn’t. I have them to confirm.
– kinokijuf
Mar 8 '12 at 12:45
Well, maybe I'm thinking of 8" floppies. I definitely remember another notch -- made the diskette as flimsy as slice of Swiss cheese.
– Daniel R Hicks
Mar 8 '12 at 17:03
|
show 4 more comments
I vaguely recall that the 1.2M ones have a notch in the side, in addition to the write notch along the top.
– Daniel R Hicks
Mar 7 '12 at 17:09
@DanH You are talking about 3,5" floppies.
– kinokijuf
Mar 7 '12 at 17:50
There was something about the notches on the 1.2M 5.25" floppies. Maybe there was a second notch on the top or some such.
– Daniel R Hicks
Mar 8 '12 at 1:58
@DanH No, there isn’t. I have them to confirm.
– kinokijuf
Mar 8 '12 at 12:45
Well, maybe I'm thinking of 8" floppies. I definitely remember another notch -- made the diskette as flimsy as slice of Swiss cheese.
– Daniel R Hicks
Mar 8 '12 at 17:03
I vaguely recall that the 1.2M ones have a notch in the side, in addition to the write notch along the top.
– Daniel R Hicks
Mar 7 '12 at 17:09
I vaguely recall that the 1.2M ones have a notch in the side, in addition to the write notch along the top.
– Daniel R Hicks
Mar 7 '12 at 17:09
@DanH You are talking about 3,5" floppies.
– kinokijuf
Mar 7 '12 at 17:50
@DanH You are talking about 3,5" floppies.
– kinokijuf
Mar 7 '12 at 17:50
There was something about the notches on the 1.2M 5.25" floppies. Maybe there was a second notch on the top or some such.
– Daniel R Hicks
Mar 8 '12 at 1:58
There was something about the notches on the 1.2M 5.25" floppies. Maybe there was a second notch on the top or some such.
– Daniel R Hicks
Mar 8 '12 at 1:58
@DanH No, there isn’t. I have them to confirm.
– kinokijuf
Mar 8 '12 at 12:45
@DanH No, there isn’t. I have them to confirm.
– kinokijuf
Mar 8 '12 at 12:45
Well, maybe I'm thinking of 8" floppies. I definitely remember another notch -- made the diskette as flimsy as slice of Swiss cheese.
– Daniel R Hicks
Mar 8 '12 at 17:03
Well, maybe I'm thinking of 8" floppies. I definitely remember another notch -- made the diskette as flimsy as slice of Swiss cheese.
– Daniel R Hicks
Mar 8 '12 at 17:03
|
show 4 more comments
4 Answers
4
active
oldest
votes
DD disks have a hub ring, HD do not. HD were quite common. There were actually Quad-Density disks also, which were a quirky standard used on some early Tandy/Radio Shack Model 2000 systems.
Notching is not an indication of single sided vs. double sided. A true double sided drive has 2 heads, and reads and writes both sides simultaneously. A Commodore, Atari, Apple, for example, only had one head, so people would notch the disk to flip it and use the opposite side. The media was certified for writing on both surfaces.
Many people warned that flipping the disks would lead to early failure, but I just used some 32 year old 'flippies' in an Apple IIe last night with very low failure rate, especially considering the age of the the magnetic surfaces.
edited Apr 13 '14 at 15:03
kinokijuf
6,81284487
answered Apr 13 '14 at 15:00
Dave PyattDave Pyatt
212
add a comment |
This site seems to confirm my observations:
DD 5.25" (360kB) diskettes look very much like HD 5.25" (1.2MB)
diskettes; however, HD diskettes seem to almost never have a hub ring,
while DD diskettes usually do. The hub ring may be white paper, etc. and easy
to spot or cut from the same material as the diskette and barely noticeable.
This difference has been mentioned by Peter Norton (of Norton Utilities fame)
in one of his books.
answered Mar 7 '12 at 17:30
kinokijufkinokijuf
6,81284487
add a comment |
Unless the manufacturer chose to mark the disks, there's no difference between them.
The ring in the centre of the disk was a manufacturing feature to prolong the life of the disk itself.
Double-sided disks will have the write-protect notch on both the left and right sides of the disk if they were intended for use in single-sided drives, but even that isn't a reliable indicator of sidedness.
You should generally be safe assuming DSDD for 5.25" disks, however, as DSHD 5.25" disks weren't very common (3.5" disks were more durable and reliable).
answered Mar 7 '12 at 17:24
EKWEKW
1,020810
-1. It is a mixture of DD and HD disks plus some without any stickers whatsoever. As I indicated, all of the DD ones have the ring, while none of the HD ones have.
– kinokijuf
Mar 7 '12 at 17:26
2
I've owned many 5.25" DD floppies without hub rings. HD floppies would frequently not have a ring, but it definitely isn't a reliable indicator that a disc is HD.
– EKW
Mar 7 '12 at 17:33
1
@kinokijuf, yes, and it also says that it is not a reliable indicator like EKW said: DD 5.25" (360kB) diskettes look very much like HD 5.25" (1.2MB) diskettes; however, HD diskettes seem to almost never have a hub ring, while DD diskettes usually do.
– Synetech
Mar 7 '12 at 18:01
2
With the caveat that it isn't 100% reliable, if you've noticed that pattern with the manufacturer in your stack of disks, it may be a reliable indicator for that manufacturer.
– EKW
Mar 7 '12 at 18:57
1
> it may be a reliable indicator for that manufacturer. At least to some extent. I’ve seen people nag that one batch of Verbatim DVDs is good while another is garbage, so even within an mfg…
– Synetech
Mar 7 '12 at 23:50
|
show 2 more comments
The surface of DD disks are coated with iron oxide and when held up to strong light are brownish.
(Think type I cassettes)
HD are made with cobalt coating and are a blueish/purple tint when held up to the light.
EHD are made with a barium ferrite coating. Ive never seen one in the wild, so apart from looking brownish, anything is possible.
answered yesterday
I3aranaI3arana
1
New contributor
I3arana is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "3"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fsuperuser.com%2fquestions%2f398002%2fhow-to-tell-double-density-vs-high-density-in-5-25-floppies%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
DD disks have a hub ring, HD do not. HD were quite common. There were actually Quad-Density disks also, which were a quirky standard used on some early Tandy/Radio Shack Model 2000 systems.
Notching is not an indication of single sided vs. double sided. A true double sided drive has 2 heads, and reads and writes both sides simultaneously. A Commodore, Atari, Apple, for example, only had one head, so people would notch the disk to flip it and use the opposite side. The media was certified for writing on both surfaces.
Many people warned that flipping the disks would lead to early failure, but I just used some 32 year old 'flippies' in an Apple IIe last night with very low failure rate, especially considering the age of the the magnetic surfaces.
edited Apr 13 '14 at 15:03
kinokijuf
6,81284487
answered Apr 13 '14 at 15:00
Dave PyattDave Pyatt
212
add a comment |
DD disks have a hub ring, HD do not. HD were quite common. There were actually Quad-Density disks also, which were a quirky standard used on some early Tandy/Radio Shack Model 2000 systems.
Notching is not an indication of single sided vs. double sided. A true double sided drive has 2 heads, and reads and writes both sides simultaneously. A Commodore, Atari, Apple, for example, only had one head, so people would notch the disk to flip it and use the opposite side. The media was certified for writing on both surfaces.
Many people warned that flipping the disks would lead to early failure, but I just used some 32 year old 'flippies' in an Apple IIe last night with very low failure rate, especially considering the age of the the magnetic surfaces.
edited Apr 13 '14 at 15:03
kinokijuf
6,81284487
answered Apr 13 '14 at 15:00
Dave PyattDave Pyatt
212
add a comment |
DD disks have a hub ring, HD do not. HD were quite common. There were actually Quad-Density disks also, which were a quirky standard used on some early Tandy/Radio Shack Model 2000 systems.
Notching is not an indication of single sided vs. double sided. A true double sided drive has 2 heads, and reads and writes both sides simultaneously. A Commodore, Atari, Apple, for example, only had one head, so people would notch the disk to flip it and use the opposite side. The media was certified for writing on both surfaces.
Many people warned that flipping the disks would lead to early failure, but I just used some 32 year old 'flippies' in an Apple IIe last night with very low failure rate, especially considering the age of the the magnetic surfaces.
edited Apr 13 '14 at 15:03
kinokijuf
6,81284487
answered Apr 13 '14 at 15:00
Dave PyattDave Pyatt
212
DD disks have a hub ring, HD do not. HD were quite common. There were actually Quad-Density disks also, which were a quirky standard used on some early Tandy/Radio Shack Model 2000 systems.
Notching is not an indication of single sided vs. double sided. A true double sided drive has 2 heads, and reads and writes both sides simultaneously. A Commodore, Atari, Apple, for example, only had one head, so people would notch the disk to flip it and use the opposite side. The media was certified for writing on both surfaces.
Many people warned that flipping the disks would lead to early failure, but I just used some 32 year old 'flippies' in an Apple IIe last night with very low failure rate, especially considering the age of the the magnetic surfaces.
edited Apr 13 '14 at 15:03
kinokijuf
6,81284487
answered Apr 13 '14 at 15:00
Dave PyattDave Pyatt
212
edited Apr 13 '14 at 15:03
kinokijuf
6,81284487
edited Apr 13 '14 at 15:03
kinokijuf
6,81284487
edited Apr 13 '14 at 15:03
kinokijuf
6,81284487
6,81284487
answered Apr 13 '14 at 15:00
Dave PyattDave Pyatt
212
answered Apr 13 '14 at 15:00
Dave PyattDave Pyatt
212
answered Apr 13 '14 at 15:00
Dave PyattDave Pyatt
212
212
add a comment |
add a comment |
This site seems to confirm my observations:
DD 5.25" (360kB) diskettes look very much like HD 5.25" (1.2MB)
diskettes; however, HD diskettes seem to almost never have a hub ring,
while DD diskettes usually do. The hub ring may be white paper, etc. and easy
to spot or cut from the same material as the diskette and barely noticeable.
This difference has been mentioned by Peter Norton (of Norton Utilities fame)
in one of his books.
answered Mar 7 '12 at 17:30
kinokijufkinokijuf
6,81284487
add a comment |
This site seems to confirm my observations:
DD 5.25" (360kB) diskettes look very much like HD 5.25" (1.2MB)
diskettes; however, HD diskettes seem to almost never have a hub ring,
while DD diskettes usually do. The hub ring may be white paper, etc. and easy
to spot or cut from the same material as the diskette and barely noticeable.
This difference has been mentioned by Peter Norton (of Norton Utilities fame)
in one of his books.
answered Mar 7 '12 at 17:30
kinokijufkinokijuf
6,81284487
add a comment |
This site seems to confirm my observations:
DD 5.25" (360kB) diskettes look very much like HD 5.25" (1.2MB)
diskettes; however, HD diskettes seem to almost never have a hub ring,
while DD diskettes usually do. The hub ring may be white paper, etc. and easy
to spot or cut from the same material as the diskette and barely noticeable.
This difference has been mentioned by Peter Norton (of Norton Utilities fame)
in one of his books.
answered Mar 7 '12 at 17:30
kinokijufkinokijuf
6,81284487
This site seems to confirm my observations:
DD 5.25" (360kB) diskettes look very much like HD 5.25" (1.2MB)
diskettes; however, HD diskettes seem to almost never have a hub ring,
while DD diskettes usually do. The hub ring may be white paper, etc. and easy
to spot or cut from the same material as the diskette and barely noticeable.
This difference has been mentioned by Peter Norton (of Norton Utilities fame)
in one of his books.
answered Mar 7 '12 at 17:30
kinokijufkinokijuf
6,81284487
edited Mar 10 '12 at 13:34
answered Mar 7 '12 at 17:30
kinokijufkinokijuf
6,81284487
answered Mar 7 '12 at 17:30
kinokijufkinokijuf
6,81284487
answered Mar 7 '12 at 17:30
kinokijufkinokijuf
6,81284487
6,81284487
add a comment |
add a comment |
Unless the manufacturer chose to mark the disks, there's no difference between them.
The ring in the centre of the disk was a manufacturing feature to prolong the life of the disk itself.
Double-sided disks will have the write-protect notch on both the left and right sides of the disk if they were intended for use in single-sided drives, but even that isn't a reliable indicator of sidedness.
You should generally be safe assuming DSDD for 5.25" disks, however, as DSHD 5.25" disks weren't very common (3.5" disks were more durable and reliable).
answered Mar 7 '12 at 17:24
EKWEKW
1,020810
-1. It is a mixture of DD and HD disks plus some without any stickers whatsoever. As I indicated, all of the DD ones have the ring, while none of the HD ones have.
– kinokijuf
Mar 7 '12 at 17:26
2
I've owned many 5.25" DD floppies without hub rings. HD floppies would frequently not have a ring, but it definitely isn't a reliable indicator that a disc is HD.
– EKW
Mar 7 '12 at 17:33
1
@kinokijuf, yes, and it also says that it is not a reliable indicator like EKW said: DD 5.25" (360kB) diskettes look very much like HD 5.25" (1.2MB) diskettes; however, HD diskettes seem to almost never have a hub ring, while DD diskettes usually do.
– Synetech
Mar 7 '12 at 18:01
2
With the caveat that it isn't 100% reliable, if you've noticed that pattern with the manufacturer in your stack of disks, it may be a reliable indicator for that manufacturer.
– EKW
Mar 7 '12 at 18:57
1
> it may be a reliable indicator for that manufacturer. At least to some extent. I’ve seen people nag that one batch of Verbatim DVDs is good while another is garbage, so even within an mfg…
– Synetech
Mar 7 '12 at 23:50
|
show 2 more comments
Unless the manufacturer chose to mark the disks, there's no difference between them.
The ring in the centre of the disk was a manufacturing feature to prolong the life of the disk itself.
Double-sided disks will have the write-protect notch on both the left and right sides of the disk if they were intended for use in single-sided drives, but even that isn't a reliable indicator of sidedness.
You should generally be safe assuming DSDD for 5.25" disks, however, as DSHD 5.25" disks weren't very common (3.5" disks were more durable and reliable).
answered Mar 7 '12 at 17:24
EKWEKW
1,020810
-1. It is a mixture of DD and HD disks plus some without any stickers whatsoever. As I indicated, all of the DD ones have the ring, while none of the HD ones have.
– kinokijuf
Mar 7 '12 at 17:26
2
I've owned many 5.25" DD floppies without hub rings. HD floppies would frequently not have a ring, but it definitely isn't a reliable indicator that a disc is HD.
– EKW
Mar 7 '12 at 17:33
1
@kinokijuf, yes, and it also says that it is not a reliable indicator like EKW said: DD 5.25" (360kB) diskettes look very much like HD 5.25" (1.2MB) diskettes; however, HD diskettes seem to almost never have a hub ring, while DD diskettes usually do.
– Synetech
Mar 7 '12 at 18:01
2
With the caveat that it isn't 100% reliable, if you've noticed that pattern with the manufacturer in your stack of disks, it may be a reliable indicator for that manufacturer.
– EKW
Mar 7 '12 at 18:57
1
> it may be a reliable indicator for that manufacturer. At least to some extent. I’ve seen people nag that one batch of Verbatim DVDs is good while another is garbage, so even within an mfg…
– Synetech
Mar 7 '12 at 23:50
|
show 2 more comments
Unless the manufacturer chose to mark the disks, there's no difference between them.
The ring in the centre of the disk was a manufacturing feature to prolong the life of the disk itself.
Double-sided disks will have the write-protect notch on both the left and right sides of the disk if they were intended for use in single-sided drives, but even that isn't a reliable indicator of sidedness.
You should generally be safe assuming DSDD for 5.25" disks, however, as DSHD 5.25" disks weren't very common (3.5" disks were more durable and reliable).
answered Mar 7 '12 at 17:24
EKWEKW
1,020810
Unless the manufacturer chose to mark the disks, there's no difference between them.
The ring in the centre of the disk was a manufacturing feature to prolong the life of the disk itself.
Double-sided disks will have the write-protect notch on both the left and right sides of the disk if they were intended for use in single-sided drives, but even that isn't a reliable indicator of sidedness.
You should generally be safe assuming DSDD for 5.25" disks, however, as DSHD 5.25" disks weren't very common (3.5" disks were more durable and reliable).
answered Mar 7 '12 at 17:24
EKWEKW
1,020810
answered Mar 7 '12 at 17:24
EKWEKW
1,020810
answered Mar 7 '12 at 17:24
EKWEKW
1,020810
answered Mar 7 '12 at 17:24
EKWEKW
1,020810
1,020810
-1. It is a mixture of DD and HD disks plus some without any stickers whatsoever. As I indicated, all of the DD ones have the ring, while none of the HD ones have.
– kinokijuf
Mar 7 '12 at 17:26
2
I've owned many 5.25" DD floppies without hub rings. HD floppies would frequently not have a ring, but it definitely isn't a reliable indicator that a disc is HD.
– EKW
Mar 7 '12 at 17:33
1
@kinokijuf, yes, and it also says that it is not a reliable indicator like EKW said: DD 5.25" (360kB) diskettes look very much like HD 5.25" (1.2MB) diskettes; however, HD diskettes seem to almost never have a hub ring, while DD diskettes usually do.
– Synetech
Mar 7 '12 at 18:01
2
With the caveat that it isn't 100% reliable, if you've noticed that pattern with the manufacturer in your stack of disks, it may be a reliable indicator for that manufacturer.
– EKW
Mar 7 '12 at 18:57
1
> it may be a reliable indicator for that manufacturer. At least to some extent. I’ve seen people nag that one batch of Verbatim DVDs is good while another is garbage, so even within an mfg…
– Synetech
Mar 7 '12 at 23:50
|
show 2 more comments
-1. It is a mixture of DD and HD disks plus some without any stickers whatsoever. As I indicated, all of the DD ones have the ring, while none of the HD ones have.
– kinokijuf
Mar 7 '12 at 17:26
2
I've owned many 5.25" DD floppies without hub rings. HD floppies would frequently not have a ring, but it definitely isn't a reliable indicator that a disc is HD.
– EKW
Mar 7 '12 at 17:33
1
@kinokijuf, yes, and it also says that it is not a reliable indicator like EKW said: DD 5.25" (360kB) diskettes look very much like HD 5.25" (1.2MB) diskettes; however, HD diskettes seem to almost never have a hub ring, while DD diskettes usually do.
– Synetech
Mar 7 '12 at 18:01
2
With the caveat that it isn't 100% reliable, if you've noticed that pattern with the manufacturer in your stack of disks, it may be a reliable indicator for that manufacturer.
– EKW
Mar 7 '12 at 18:57
1
> it may be a reliable indicator for that manufacturer. At least to some extent. I’ve seen people nag that one batch of Verbatim DVDs is good while another is garbage, so even within an mfg…
– Synetech
Mar 7 '12 at 23:50
-1. It is a mixture of DD and HD disks plus some without any stickers whatsoever. As I indicated, all of the DD ones have the ring, while none of the HD ones have.
– kinokijuf
Mar 7 '12 at 17:26
-1. It is a mixture of DD and HD disks plus some without any stickers whatsoever. As I indicated, all of the DD ones have the ring, while none of the HD ones have.
– kinokijuf
Mar 7 '12 at 17:26
2
2
I've owned many 5.25" DD floppies without hub rings. HD floppies would frequently not have a ring, but it definitely isn't a reliable indicator that a disc is HD.
– EKW
Mar 7 '12 at 17:33
I've owned many 5.25" DD floppies without hub rings. HD floppies would frequently not have a ring, but it definitely isn't a reliable indicator that a disc is HD.
– EKW
Mar 7 '12 at 17:33
1
1
@kinokijuf, yes, and it also says that it is not a reliable indicator like EKW said: DD 5.25" (360kB) diskettes look very much like HD 5.25" (1.2MB) diskettes; however, HD diskettes seem to almost never have a hub ring, while DD diskettes usually do.
– Synetech
Mar 7 '12 at 18:01
@kinokijuf, yes, and it also says that it is not a reliable indicator like EKW said: DD 5.25" (360kB) diskettes look very much like HD 5.25" (1.2MB) diskettes; however, HD diskettes seem to almost never have a hub ring, while DD diskettes usually do.
– Synetech
Mar 7 '12 at 18:01
2
2
With the caveat that it isn't 100% reliable, if you've noticed that pattern with the manufacturer in your stack of disks, it may be a reliable indicator for that manufacturer.
– EKW
Mar 7 '12 at 18:57
With the caveat that it isn't 100% reliable, if you've noticed that pattern with the manufacturer in your stack of disks, it may be a reliable indicator for that manufacturer.
– EKW
Mar 7 '12 at 18:57
1
1
> it may be a reliable indicator for that manufacturer. At least to some extent. I’ve seen people nag that one batch of Verbatim DVDs is good while another is garbage, so even within an mfg…
– Synetech
Mar 7 '12 at 23:50
> it may be a reliable indicator for that manufacturer. At least to some extent. I’ve seen people nag that one batch of Verbatim DVDs is good while another is garbage, so even within an mfg…
– Synetech
Mar 7 '12 at 23:50
|
show 2 more comments
The surface of DD disks are coated with iron oxide and when held up to strong light are brownish.
(Think type I cassettes)
HD are made with cobalt coating and are a blueish/purple tint when held up to the light.
EHD are made with a barium ferrite coating. Ive never seen one in the wild, so apart from looking brownish, anything is possible.
answered yesterday
I3aranaI3arana
1
New contributor
I3arana is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
The surface of DD disks are coated with iron oxide and when held up to strong light are brownish.
(Think type I cassettes)
HD are made with cobalt coating and are a blueish/purple tint when held up to the light.
EHD are made with a barium ferrite coating. Ive never seen one in the wild, so apart from looking brownish, anything is possible.
answered yesterday
I3aranaI3arana
1
New contributor
I3arana is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
The surface of DD disks are coated with iron oxide and when held up to strong light are brownish.
(Think type I cassettes)
HD are made with cobalt coating and are a blueish/purple tint when held up to the light.
EHD are made with a barium ferrite coating. Ive never seen one in the wild, so apart from looking brownish, anything is possible.
answered yesterday
I3aranaI3arana
1
New contributor
I3arana is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
The surface of DD disks are coated with iron oxide and when held up to strong light are brownish.
(Think type I cassettes)
HD are made with cobalt coating and are a blueish/purple tint when held up to the light.
EHD are made with a barium ferrite coating. Ive never seen one in the wild, so apart from looking brownish, anything is possible.
answered yesterday
I3aranaI3arana
1
New contributor
I3arana is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered yesterday
I3aranaI3arana
1
New contributor
I3arana is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered yesterday
I3aranaI3arana
1
answered yesterday
I3aranaI3arana
1
1
New contributor
I3arana is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
I3arana is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I3arana is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
Thanks for contributing an answer to Super User!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fsuperuser.com%2fquestions%2f398002%2fhow-to-tell-double-density-vs-high-density-in-5-25-floppies%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
I vaguely recall that the 1.2M ones have a notch in the side, in addition to the write notch along the top.
– Daniel R Hicks
Mar 7 '12 at 17:09
@DanH You are talking about 3,5" floppies.
– kinokijuf
Mar 7 '12 at 17:50
There was something about the notches on the 1.2M 5.25" floppies. Maybe there was a second notch on the top or some such.
– Daniel R Hicks
Mar 8 '12 at 1:58
@DanH No, there isn’t. I have them to confirm.
– kinokijuf
Mar 8 '12 at 12:45
Well, maybe I'm thinking of 8" floppies. I definitely remember another notch -- made the diskette as flimsy as slice of Swiss cheese.
– Daniel R Hicks
Mar 8 '12 at 17:03