Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!samsung!think!kulla!ephraim
From: ephraim@kulla (Ephraim Vishniac)
Newsgroups: comp.sys.mac.hardware
Subject: Re: SCSI question
Message-ID: <32253@news.Think.COM>
Date: 15 Dec 89 16:11:22 GMT
References: <1204@mit-amt.MEDIA.MIT.EDU> <1309@key.COM> <2390@jolnet.ORPK.IL.US>
Sender: news@Think.COM
Reply-To: ephraim@think.com
Organization: Thinking Machines Corporation, Cambridge MA, USA
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In article <2390@jolnet.ORPK.IL.US> hammen@jolnet.UUCP (Robert J. Hammen) writes:
>
>SE, II, Portable: boot from disk set in "Startup Device" cdev and stored in
>PRAM. Otherwise, boot from SCSI ID 0.

Here's something I've wondered about: A disk (SCSI device, in this
case) isn't the same thing as a volume.  You don't boot from a disk,
but from a volume on the disk.  But drive numbers for volumes are
assigned dynamically at boot time.  So what does "Startup Device"
actually record?  A SCSI ID?  A drive number?  If the former, which
volume does it use, given a choice?  If the latter, isn't that bogus? 

>Robert Hammen | Technical Editor | Personal Publishing | hammen@ddsw1.mcs.com

Ephraim Vishniac    ephraim@think.com   ThinkingCorp@applelink.apple.com
 Thinking Machines Corporation / 245 First Street / Cambridge, MA 02142
        One of the flaws in the anarchic bopper society was
        the ease with which such crazed rumors could spread.