Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: mcneil@lll-crg.llnl.gov (Mike McNeill)
Newsgroups: comp.sys.sun
Subject: Re: Booting from SCSI drive at address 1 vs. 0
Keywords: Hardware
Message-ID: <23278@lll-winken.LLNL.GOV>
Date: 25 Apr 89 11:10:59 GMT
References: <1354@infopiz.uucp>
Sender: usenet@rice.edu
Organization: Sun-Spots
Lines: 10
Approved: Sun-Spots@rice.edu
Original-Date: Sat Apr  8 09:35:35 1989
X-Sun-Spots-Digest: Volume 7, Issue 246, message 2 of 12

lupine!infopiz!mark@uunet.uu.net (Mark Pizzolato 415-369-9366) writes:
>We've got lots of Sun 3/60s and LOTS more SCSI disk drives.  From time to
>time it has been desirable to boot Sun OS 3.x from a SCSI disk whose SCSI
>address is other than 0.  We have been totally unsuccessful with regard to
>achieving this result.  Any ideas?

I had the exact same situation earlier on a standalone 3/60 with 2 SCSI
disks (addrs 0 and 1).  The formula I got for determing unit in b(cntlr,
unit, part) for embedded SCSI disks is unit = SCSI_address << 2.  I leave
it to someone else to explain _why_ this is so...............Mike