Path: utzoo!attcan!uunet!cs.utexas.edu!sun-barr!texsun!convex!concave!datri
From: datri@concave.uucp (Anthony A. Datri)
Newsgroups: comp.unix.wizards
Subject: Re: Trashed Disk Labels Under Sun OS 3.5
Message-ID: <1509@convex.UUCP>
Date: 10 Aug 89 15:36:43 GMT
References: <5253@wiley.UUCP>
Sender: usenet@convex.UUCP
Reply-To: datri@convex.com
Organization: Convex Computer Corporation, Richardson, Tx.
Lines: 11

>How come when I mount all of the disk as swap or anything in an 'a'
>partition on a local Micropolis 1355 disk connected to one of our
>clients the disk label gets trashed?

Sun's RTF or release notes document this -- the label occupys the
first sector (track?) on the disk, and using the normal a partition
as swap overwrites it; it seems that the filesystem code skips over it.
Their solution is to make a 1 cylinder a partition, then have b go
from there to the end of the disk, and use b for swap.  I suspect that
making the label with the a parititon starting at cylinder 1 instead of
0 would work as well.