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From: martyz@ted.cs.uidaho.edu
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: Re: Exchanging 3.5" floppies with non-PS2 machines (trouble!)
Message-ID: <1991Apr04.213512.1756@groucho>
Date: 4 Apr 91 21:35:12 GMT
References: <1991Apr2.234458.4806@newross.Princeton.EDU> <1991Apr3.081927.3295@nntp-server.caltech.edu>
Sender: martyz@ted.cs.uidaho.edu (Marty Zimmerman)
Organization: University of Idaho
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In article <1991Apr3.081927.3295@nntp-server.caltech.edu> nyet@nntp-server.caltech.edu (n liu) writes:
>hundt@samadams.princeton.edu (Tom Hundt) writes:
>
>
>>Here I thought it was just my own fault.  My Model 80 at work
>>wouldn't exchange floppies (reliably) with my clone at home... 
>>Problems came with 720K disks especially.  If I formatted a disk
>
...

>The deal (i think) is this.. PS/2 1.44 drives don't check for HD
>holes on disk. This means that 720K disks get formatted to 1.44M

It's not just the density problem.  I've found that exchanging disks
between PS/2's and non-PS/2's is unreliable even if the disks are formatted
low density (720K).  In fact, in our 80-machine lab, it is common for a
disk written on one PS/2 to be unreadable by the machine next to it.  If
anyone has a solution, I'd like to hear it.