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Subject: RE: Creating a copy protected floppy
Date: Wed, 20 Jul 2005 15:32:08 -0600
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Thread-Topic: djgpp weekly digest for 16 Jul 2005
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From: "Schumacher, Gordon" <gordon_schumacher AT maxtor DOT com>
To: "DJGPP List \(E-mail\)" <djgpp AT delorie DOT com>
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# From: Ari Lukumies <nospam DOT ari DOT lukumies AT gmail DOT com DOT invalid>
# Subject: Re: Creating a copy protected floppy
# Date: Thu, 14 Jul 2005 19:45:07 +0300
# To: djgpp AT delorie DOT com
# 
# BTW, this goes for hard disks, also: if you use one in one computer 
# and move it to another, it may require reformatting before being 
# usable (or reliably stabile, at least).

Nope; this is thoroughly false (with the exception of very old
SCSI setups, which I'll get back to).

The heads are contained within the hard disk - there's nothing
that changes about the media or heads by changing computers.
The only thing that could cause a problem is if something about
one machine's hardware is out of spec (i.e., mistimed PCI bus,
improper cable length, etc.) but in those cases it'll have
problems no matter what - it's a hardware problem and
reformatting the drive won't help.

About the old SCSI thing: once upon a time, the computer relied
on the physical layout of the disk, and some SCSI controllers
used this in a proprietary way, not portable to other SCSI
controllers.  You won't need to worry about this if you're using
even *vaguely* modern hardware, though.