Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!apple!marc
From: marc@Apple.COM (Mark Dawson)
Newsgroups: comp.sys.mac.misc
Subject: Re: Apple file exchange
Message-ID: <44752@apple.Apple.COM>
Date: 12 Sep 90 23:26:19 GMT
References: <1990Sep11.175832.13343@Neon.Stanford.EDU> <44727@apple.Apple.COM> <1325@mts.ucs.UAlberta.CA>
Organization: Apple Computer Inc., Cupertino, CA
Lines: 37

In article <1325@mts.ucs.UAlberta.CA> userDJMA@mts.ucs.UAlberta.CA (Douglas James Martin) writes:
>In article <44727@apple.Apple.COM>, marc@Apple.COM (Mark Dawson) writes:
>>>
>>I don't know if AFE can read 360K disks, but I've never had any trouble using
>>AFE on 720K 3.5" disks (of course, that was about 1 1/2 yrs ago, but I can't
>>believe that feature would have been deleted).
>>
>>Mark
>>
>You misunderstood slightly, I think.
>HD diskettes have an extra hole opposite the write-protect hole.
>If you want to read a disk in a Superdrive (as well as many but
>not all other HD drives), the format MUST correspond to the
>presence/absence of the hole (i.e. 1.44 Meg format is required
>if you have the hole, it is forbidden if you don't). The problem
>arises if you format a disk using a drive that does not have this
>requirement and you do something like format a HD disk for 720K
>or a DD disk for 1.44Meg -- your Superdrive won't read it because
>the disk format doesn't correspond to the presence/absence of the
>hole.
> 
Well, I wasn't using a SuperDrive to read the disks, I was using a regular
"800K" Mac drive; I've never tried to use a 720K formatted HD diskette in
a SuperDrive (that I remember).  FYI I was using Kennect's Rapport (I developed
the Mac software/drivers for it) to be able to read the 720K format on the
regular drives (that was 1 1/2yrs ago, so my memory is a little hazy...).

Mark


-- 
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Mark Dawson                Service Diagnostic Engineering
AppleLink: Dawson.M

Apple says what it says; I say what I say.  We're different
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