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From: rbj@icst-cmr.arpa (Root Boy Jim)
Newsgroups: comp.unix.wizards
Subject: Where does Ultrix put the partition tables for RA[2568][01235]s?
Message-ID: <7954@brl-adm.ARPA>
Date: Mon, 22-Jun-87 20:58:20 EDT
Article-I.D.: brl-adm.7954
Posted: Mon Jun 22 20:58:20 1987
Date-Received: Tue, 23-Jun-87 07:24:52 EDT
Sender: news@brl-adm.ARPA
Lines: 22


   I've been thinking about hacking this into 4.3BSD, and I thought it
   would be nice to put them in the same place that Ultrix does...

I always thought that using the odd blocks between the bad sector
info (DEC bad144 format, the first five even block of the last track)
would be a good idea.

   (we might have to run Ultrix at some time ...).

Well, then maybe it's a good idea to do it their way.

   When are the tables read in, at boot time, at first access to the
   drive, or when partition 'a' is mounted?

I would guess at boot time. My method has the advantage that you can
piggyback partitioning info onto the bad block processing, which has
to be done first anyway. Plus, the area is guaranteed to be good.

	(Root Boy) Jim Cottrell	<rbj@icst-cmr.arpa>
	National Bureau of Standards
	Flamer's Hotline: (301) 975-5688