All from memory. Assuming they're Apple --
The original format was 35 cylinders, 13 sectors per cylinder, 256 bytes
per
sector (116480 bytes/disk).
Then thru a firmware upgrade to the diskdrive controller card, the
sector/cylinder went from 13 to 16 (143360 bytes/disk).
Apple had a variety of operating systems for 5-1/4.
dos 3.2
dos 3.3
ProDOS - latest rev was 1.9
I think GS/OS was for Apple 3.5 drives
They also could be CP/M-based (which also worked in Apple via a Z80
cpu-card)
If it's not copy-protected, and if the contents haven't succumbed to
bit-rot,
then it can be read - but not by a PC floppy (360/720/1.2). You need an
Apple
II, a floppy controller, & 1 Apple floppy drive (preferrably 2) - 1 for
boot
media, & 1 for the disk(s) you need to read.
Of course, after you're able to read it, you'll want to copy the contents
(like to a x86 platform). For that, an Apple "Super Serial Card" is needed
(19.2kbps max) + modem software.
The keyboard is built-in. The video is RCA composite "banana-plug". Attach
to
just about any TV or VCR. Text display is either 40x24 (or 80x24 with a
Apple
80-column card -- Apple IIe specific).
Graphics mode is 16-color 48x40 (lo-res) or 8-color 192x280 (hi-res).
I have several of these (working, but not in use). I just can't bring
myself
to throw away functional hardware. I still use my 1st Apple II (since
1985).
I upgraded it with a 40MB hard drive & 3MB ram (default is 64 or 128k). I
use
it for my checkbook & tense up every time I have to turn it off - for fear
that the drive won't spin up again.
If you want to try recovery yourself, let me know & I can provide you the
hardware (minus the modem) <$20.
Or I can try to read your disks - no charge. & copy the contents to a
floppy,
cd, or zip.
Let me know.
--
Tom Picray, Unix Sysadm/Secadm & long-time Apple user.
tom.picray.b@bayer.com
513.755.6795 (Cincinnati area)
#include <std/disclaimer.h>
sety martin <wearing_a_greyhat@yahoo.com>
08/23/2004 10:47 AM
To: forensics@securityfocus.com
cc:
Subject: 5.25 Inch Disk Data Recovery
Hi all,
I would appreciate any help in trying to resolve a
problem I am having.
I am trying to recover data from some 5.25 inch disks.
They came off an older Apple system. (Apple 2?).
I have tried using dd, Ghost, Encase, FTK, Winhex and
Norton Utilites to view/image these diskettes without
any success.
It is not clear to me if there is still valid data on
these disks. My experience has shown me that data on
a 5.25 inch can get corrupted over time. Does anyone
know if the tools above could successfully read these
disks? I am using a 1.2 Mb drive. If these tools
can't do the job, does anyone know of a definitive way
to get at this data using an x86 or Sun system?
Thanks all,
Sety
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