Path: utzoo!utgpu!watmath!uunet!labrea!bloom-beacon!mit-eddie!andante!att!icus!lenny
From: lenny@icus.islp.ny.us (Lenny Tropiano)
Newsgroups: unix-pc.general
Subject: Re: Drive in 3B1?
Message-ID: <542@icus.islp.ny.us>
Date: 13 Nov 88 04:33:44 GMT
References: <1015@naucse.UUCP> <498@kosman.UUCP>
Reply-To: lenny@icus.islp.ny.us (Lenny Tropiano)
Distribution: unix-pc
Organization: ICUS Software Systems, Islip, New York
Lines: 28

In article <498@kosman.UUCP> kevin@kosman.UUCP (Root) writes:
|>In article <1015@naucse.UUCP> sbw@naucse.UUCP (Steve Wampler) writes:
|>>I have a (he thinks) fairly simple question about replacing
|>>the drive in a 3B1.  I see that Miniscribe has a drive, the
|>>model 6128, that is ST506/412, 110.1MB(formatted), with 1024
|>>cylinders and 8 heads.  Can I drop one of these straight into
|>>my 3B1 (which currently has a 40MB drive)?
|>> ...
|>>  Any comments?
|>
|>Hmmmm.  The standard "67MB" UNIX PC drive has 1024 cylinders, and 8 heads.
|>It is actually a 71.3 MB drive, but after allowing for alternate sectors
|>there are 67 MB available.  How does the 6128 get 110.1 MB???  
...
The Miniscribe 6128 is a 128MB (unformatted) and 109MB (formatted) HD 
with 8 heads and 1024 cylinders.  The only bad part is that it 
uses the RLL recording format, something the WD1010 disk controller
doesn't support.  What you have in your machine with a 85.3MB (unformatted)
and 71.3MB (formatted) Miniscribe 6085 drive that uses the MFM recording
method.  If you want >1024 cylinders the WD2010 needs to be used.  If you
need >8 heads then you need the P5.1 upgrade to be installed.

-Lenny
-- 
Lenny Tropiano             ICUS Software Systems         [w] +1 (516) 582-5525
lenny@icus.islp.ny.us      Telex; 154232428 ICUS         [h] +1 (516) 968-8576
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