Path: utzoo!mnetor!uunet!lll-winken!lll-tis!ames!mailrus!rutgers!umd5!trantor.umd.edu!chris
From: chris@trantor.umd.edu (Chris Torek)
Newsgroups: comp.unix.wizards
Subject: Re: Disk maps on unix disks (a standard???)
Message-ID: <2568@umd5.umd.edu>
Date: 17 Apr 88 22:34:03 GMT
References: <355@tandem.UUCP>
Sender: ris@umd5.umd.edu
Reply-To: chris@trantor.umd.edu (Chris Torek)
Organization: University of Maryland, College Park
Lines: 19

In article <355@tandem.UUCP> narayan@tandem.UUCP (Narayan Mohanram) writes:
>In most unix systems, when one makes a file system via an FSCK,

(Must be painful.  I use newfs or mkfs. :-) )

>... Has any-one come up with a standard for putting these partition map
>info on the front a disk on a super-super block so to speak.

4.3-Tahoe has pack labels.  These are stuffed into the middle of the
boot sector.  Only the hp (massbuss disk) and ra (uda50 disk) drivers
really support labels, unless someone has done the up (Emulex sc21
Unibus) driver recently (kre??).

>Then one can mount a disk pack on any unix system, and read it.

Not quite: the label is stored in `native' byte order, so moving
from, e.g., a Vax to a Tahoe will not work.
-- 
In-Real-Life: Chris Torek, Univ of MD Computer Science, +1 301 454 7163
Domain: chris@mimsy.umd.edu		Path: ...!uunet!mimsy!chris