29 Sep
1999
29 Sep
'99
5:23 p.m.
In a message dated 09/30/1999 1:05:05 AM Eastern Daylight Time, donm(a)cts.com
writes:
I think that you are confusing DSHD and 96tpi which
are not necessarily
the same thing.
You might be right (about my confusion) ;>)
Most DSDD disks will format to 96tpi (720k on
5.25"),
even the generics. But I have yet to successfully format a DSDD (360k)
to 1.2mb or a DSHD (1.2mb) to 360k.
ISTR formatting DSHD diskettes to 360 KB in an emergency (we're talking
IBM-type pcs here) but only after hitting them with a bulk tape eraser to
wipe them clean, and then using the proper DOS FORMAT parameters . . .
Then again, I've been wrong before ;>)
Regards,
Glen Goodwin
0/0
30 Sep
30 Sep
8:34 a.m.
On Thu, 30 Sep 1999 Glenatacme(a)aol.com wrote:
In a message dated 09/30/1999 1:05:05 AM Eastern
Daylight Time, donm(a)cts.com
writes:
Was this in a 1.2mb drive? I never tried that, only in a 360k drive.
Hmmm! Interesting, I just tried it and it seems to work. Even wrote to
it in a 360k drive and it was readable. Question is, how long?
- don
I think that you are confusing DSHD and 96tpi
which are not necessarily
the same thing.
You might be right (about my confusion) ;>)
Most DSDD disks will format to 96tpi (720k on
5.25"),
even the generics. But I have yet to successfully format a DSDD (360k)
to 1.2mb or a DSHD (1.2mb) to 360k.
ISTR formatting DSHD diskettes to 360 KB in an emergency (we're talking
IBM-type pcs here) but only after hitting them with a bulk tape eraser to
wipe them clean, and then using the proper DOS FORMAT parameters . . . Then again, I've been wrong before ;>)
Regards,
Glen Goodwin
0/0
9:46 a.m.
Don Maslin <donm(a)cts.com> wrote:
Hi
This is the same thing I was talking about, using a magnet
to erase with. The only problem you may have is if you then
write a file with a 360K disk drive, you can never write to
it again with the 1.2M drive. If you do, you'll not be able
to read it again with the 360K drive. As was mentioned before,
the 1.2M drive writes a narrower track. I do have a 360K drive
that I keep around just to make 360K copies but the
1.2M trick will work if nothing else is available.
Dwight
ISTR
formatting DSHD diskettes to 360 KB in an emergency (we're talking
IBM-type pcs here) but only after hitting them with a bulk tape eraser to
wipe them clean, and then using the proper DOS FORMAT parameters . . .
Was this in a 1.2mb drive? I never tried that, only in a 360k drive.
Hmmm! Interesting, I just tried it and it seems to work. Even wrote to
it in a 360k drive and it was readable. Question is, how long? 
11:43 a.m.
On Thu, 30 Sep 1999, Dwight Elvey wrote:
This is the same thing I was talking about, using a
magnet
to erase with. The only problem you may have is if you then
write a file with a 360K disk drive, you can never write to
it again with the 1.2M drive. If you do, you'll not be able
to read it again with the 360K drive. As was mentioned before,
the 1.2M drive writes a narrower track. I do have a 360K drive
that I keep around just to make 360K copies but the
1.2M trick will work if nothing else is available.
That's the right way to do it, ANY time that you have two different head
widths. (360K wide head v either 1.2M or 720K 5.25" narrow head)
A virgin disk would do fine, but these days it might be hard to find a
diskette that isn't either used or pre-formatted.
But if your data matters, avoid ever using a diskette with the wrong
coercivity.
11:36 a.m.
On Thu, 30 Sep 1999, Don Maslin wrote:
In the case of the ROYTYPE diskettes, the data looked just fine for 1 to
48 hours. YMMV
The type of drive won't make much difference, since it will be writing at
the "360K" write current level. Width of head will make SOME difference,
but probably not much.
ISTR
formatting DSHD diskettes to 360 KB in an emergency (we're talking
Hmmm!
Interesting, I just tried it and it seems to work. Even wrote to
it in a 360k drive and it was readable. Question is, how long?
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4 comments
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participants (4)
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cisin＠xenosoft.com -
donm＠cts.com -
elvey＠hal.com -
Glenatacme＠aol.com