RE: 5.25 Inch Disk Data Recovery

Some of these tools may be interesting...

http://www.emulation.net/apple2/

-----Original Message-----
From: Valdis.Kletnieks@vt.edu [mailto:Valdis.Kletnieks@vt.edu]
Sent: Wednesday, August 25, 2004 2:16 PM
To: sety martin
Cc: forensics@securityfocus.com
Subject: Re: 5.25 Inch Disk Data Recovery 


On Mon, 23 Aug 2004 07:47:41 PDT, sety martin said:
> I am trying to recover data from some 5.25 inch disks.
>  They came off an older Apple system. (Apple 2?).

I seem to recall that Apple played some funny games with the
floppies - rather than a constant angular velocity and 18 blocks
on each track inside to outside, they had a drive motor that
could change speeds, so they ran constant *linear* velocity,
got 18 blocks/track on the innermost tracks, and a bit higher
on the middle tracks, and something like 30 blocks/track on the
outermost tracks.

If this is the case, you'll need hardware/software that's capable of
doing the Apple speed tricks....

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