Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!umcp-cs!chris
From: chris@umcp-cs.UUCP (Chris Torek)
Newsgroups: net.unix-wizards
Subject: Re: RAxx disk partitons
Message-ID: <4131@umcp-cs.UUCP>
Date: Sat, 1-Nov-86 18:37:18 EST
Article-I.D.: umcp-cs.4131
Posted: Sat Nov  1 18:37:18 1986
Date-Received: Mon, 3-Nov-86 23:38:36 EST
References: <4539@brl-smoke.ARPA> <2452@phri.UUCP>
Reply-To: chris@umcp-cs.UUCP (Chris Torek)
Organization: University of Maryland, Dept. of Computer Sci.
Lines: 19

In article <2452@phri.UUCP> roy@phri.UUCP (Roy Smith) writes:
>...  One of the problems is that it is not easy for the software
>to tell if you actually have an RA60, 80, or 81 out there

Actually, it is easy; there is a media identifier in the on line
end (response) packet.  There is another (different, printable) ID
in the get unit status end packet.

>Another problem, I think, is that I've seen DEC literature which
>alternately lists the RA81 as having 51 or 52 sectors per track (I
>believe 51 is the right number, but don't hold me to that).  The
>UDA-50 does a pretty good job of hiding cylinder boundaries anyway.

(Perhaps too good.)  The RA81 has 52 sectors per track, but one
sector on every track is reserved for bad block replacement.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7690)
UUCP:	seismo!umcp-cs!chris
CSNet:	chris@umcp-cs		ARPA:	chris@mimsy.umd.edu