Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!amdcad!sun!pepper!cmcmanis
From: cmcmanis%pepper@Sun.COM (Chuck McManis)
Newsgroups: comp.sys.amiga
Subject: Re: Hard Disk Problems
Message-ID: <54765@sun.uucp>
Date: 27 May 88 17:26:04 GMT
References: <267@richp1.UUCP> <5972@cup.portal.com>
Sender: news@sun.uucp
Reply-To: cmcmanis@sun.UUCP (Chuck McManis)
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Organization: Sun Microsystems, Mountain View
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In article <5972@cup.portal.com> thad@cup.portal.com writes:
> From the Seagate manual for the ST238R, the drive has 4 heads, 615
> cylinders, and 2 disks.
>
> Probably C.Ltd wanted to be conservative, permitting 5 cylinders for
> use containing alternate sectors (mapped out from lower-numbered cyls).

I'll bet if you look at the specs for the ST238N (the SCSI version)
you will find the disk suddenly has fewer cylinders because the SCSI
controller reserves them for loading it's software and doing bad block
management. They are not available for general use. In general, whenever
on talks about a Seacrate^H^H^H^H^Hgate drive one has to specify the
letters and numbers after the model number because that has a very 
definite effect on how one interprets the question. 



--Chuck McManis
uucp: {anywhere}!sun!cmcmanis   BIX: cmcmanis  ARPAnet: cmcmanis@sun.com
These opinions are my own and no one elses, but you knew that didn't you.