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From: roger@grenada.UUCP (Roger Corman)
Newsgroups: comp.sys.mac
Subject: Re: SE/30 problem with external SCSI drive
Message-ID: <418@grenada.UUCP>
Date: 3 Jun 89 00:30:57 GMT
References: <107154@sun.Eng.Sun.COM> <327@smsdpg.uu.net> <7598@spool.cs.wisc.edu> <25065@agate.BERKELEY.EDU> <1790@taux01.UUCP>
Reply-To: roger@grenada.uu.net (Roger Corman)
Organization: Island Graphics, Santa Rosa, California
Lines: 20

>.In article <7598@spool.cs.wisc.edu> engber@shorty.cs.wisc.edu (Mike Engber) writes:
>.>Has anyone else had problems booting an SE/30 with an external SCSI
>.>drive attached, but not powered up. This seems like the same problem
>.>a mac+ with old ROMs has. Did Apple make the same mistake twice?
>.>(the drive I used was a CMS 40M)
>.>-ME
>.
>.Nah, it's not Apple's fault. All SCSI devices on a chain must be on.
>.That includes your external drive, since it's connected.
>.
>.--- Alex
I have been through this problem with an external drive on my IIx and
discovered that most people are confused on this issue.  The Mac IIx,
IIcx and SE/30 do not require all SCSI devices to be powered on to boot.
They DO require proper termination.  The drive I had connected had an 
internal SCSI terminator which only works with power on.  To allow
booting from the internal drive with the external drive powered off
I added an external SCSI terminator.  My advice is to spend the $18 or
so and add the terminator so that you have the option.
Roger Corman