Re: How to play an old floppy disk.
- From: "mscotgrove@xxxxxxx" <mscotgrove@xxxxxxx>
- Date: Mon, 9 Jun 2008 20:44:36 -0700 (PDT)
On Jun 10, 4:12 am, mm <NOPSAMmm2...@xxxxxxxxxxx> wrote:
On Mon, 09 Jun 2008 08:59:26 +1000, Franc Zabkar
<fzab...@xxxxxxxxxxxxxxxxx> wrote:
On Sat, 07 Jun 2008 22:58:37 -0400, mm <NOPSAMmm2...@xxxxxxxxxxx> put
finger to keyboard and composed:
On Sun, 08 Jun 2008 09:06:21 +1000, Franc Zabkar
<fzab...@xxxxxxxxxxxxxxxxx> wrote:
If your diskette is a foreign format, then try Sydex's 22disk and/or
Anadisk. AIUI, Anadisk can analyse the physical format of your
diskettes
I want to try all the recommended programs, but so far, I've just
gotten Anadisk, and it's version 2.07 from 1992. It can create a disk
with user-defined sectors and stuff, but everything else gives the
message, Not ready reading drive B. I have to find a more recent
version. :)
I just tried version 2.07 on some 20-year-old 5.25" Nashua CP/M
diskettes. One was a DSQD 96TPI MD2F, the other a DSDD 96TPI MD2F.
Both were detected as double density with a sector size of 256 bytes
(MS uses 512 bytes), 16 sectors per track and 80 tracks per side. I
was also able to detect a DD 48TPI DOS diskette.
Hmmm. Then there is still the issue you raised about what OS was used
to write it. I called the owner and to my surprise, she said she had
had a macintosh in her office then, but then her husband called to her
that he had never seen a disk like this, 5.25 floppy, for a macintosh,
and he has used Macintosh at work for 10 or 20 years.
I must have misunderstood. Did Macintosh use the same 5.25" floppies
that PC's did? Could the wife be right?
On the theory she was right, I googled and learned about MacDisk for
Windows, downloaded that, and tried it. When I click on B-drive, it
freezes for a while, and eventually comes back with the reply that the
drive is broken or there is no media in the drive (Drive doesn't
reply). (As an aside, sometimes it comes back with that message but
the computer stays frozen, and one time it unfroze the computer (based
on the ability to move the cursor) . As I said, I've used the drive
for my own floppies in the last two days and it works fine.
I get a message each time I start MacDisk that the ASPI isn't up to
date and to run the ASPI program that was included in the download,
but the date on that is actually a few months older than any of my
other ASPI files, and I don't want to risk installing an older
file(s). Should I look into that further? I can probably
update/backdate ASPI and then undo the damage later.
The advantage of RESQFLPY was that it doesn't abort if it comes across
a bad sector. It just goes to the next sector. However it thinks
every sector is bad and that doesn't seem likely.
Hopefully it leaves you with a log that tells you which sectors were
bad and which were really zero-filled.
It didn't, but maybe that's because it thought every sector was bad.
I would think that in the absence of a log, one better way to flag a
bad sector would be to write "BAD" repetitively all over the relevant
section of the image file.
Me too. But it just said Null, according to Notepad+. I wish I still
had 4DOS installed. It has a great, easy to use, List program that
displays data in place just as it is, in hex and ascii. I could find
the disks and reinstall it, but I'm so busy.
BTW, I always check my discs for physical damage by rotating the disc
inside the jacket and looking for scratches or signs of mould.
OK, I'm doing that right now. Sometimes it rotates fairly easily, but
much of the time it doesn't want to rotate at all. I can see the disc
bending in the main window**, and I have to let go.
Any chance the disc isn't really spinning and that's causing all of
this? How do I make sure it's spinning when in the drivee? I've had
trouble spinning discs before, and not especially discs that didn't
work. I figured it was just hard to do, or I was no good at doing it.
**By main window, I mean the windows on each side that are shaped like
a running track that surrounds a football field. Not counting the
little round hole it uses just to know the disc is spinning, That's
the only place where it reads data, right? That is, in order to
rotate the disc, when just putting two fingers in the middle hole
wouldn't grip the disc hard enough, I used my thumbs and forefingers
on some of that part of the media that one can see through the center
hole. I left fingerprint oil probably. Is what I did bad?
If
mould clogs your R/W heads, then you risk damaging other diskettes.
What I could see of the media looked ok. No mould and no apparent
scratches.
- Franc Zabkar
If you are inclined to email me
for some reason, remove NOPSAM :-)- Hide quoted text -
- Show quoted text -
I don't think I have ever seen a 5.25" Macintosh disk
I think the original Apple disks had two versions, a 13 and a 16
sector version for the original 5.25" Apple. These were both GCR and
can not be read with any standard PC hardware, hence the reason I was
designing disk controllers 24 years ago. There were then several
logical formats for these disks, Apple DOS, ProDos to name just 2, but
there are more.
Michael
.
- References:
- How to play an old floppy disk.
- From: mm
- Re: How to play an old floppy disk.
- From: Franc Zabkar
- Re: How to play an old floppy disk.
- From: mm
- Re: How to play an old floppy disk.
- From: Franc Zabkar
- Re: How to play an old floppy disk.
- From: mm
- Re: How to play an old floppy disk.
- From: Franc Zabkar
- Re: How to play an old floppy disk.
- From: mm
- How to play an old floppy disk.
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