Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!zaphod.mps.ohio-state.edu!unix.cis.pitt.edu!dsinc!bagate!cbmvax!daveh
From: daveh@cbmvax.commodore.com (Dave Haynie)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: A3000 and Syquest -- booting
Message-ID: <21605@cbmvax.commodore.com>
Date: 15 May 91 16:48:34 GMT
References: <21010.282c6b6a@oregon.uoregon.edu> <1991May13.115455@alamo.Berkeley.EDU> <21017.282eec91@oregon.uoregon.edu>
Reply-To: daveh@cbmvax.commodore.com (Dave Haynie)
Distribution: usa
Organization: Commodore, West Chester, PA
Lines: 34

In article <21017.282eec91@oregon.uoregon.edu> gpotts@oregon.uoregon.edu writes:

>> This is not a Syquest specific problem. I have a Syquest 44 and a Seagate 
>> 277 in an external box, and I also have to disconnect the cable when leaving
>> them powered off. 

>Well, this suonds to me like a serious shortcoming of the A3000's SCSI
>manager. The Mac's SCSI manager, for all its problems, can at least go
>out on the external buss, find what is there and powered up, mount what
>is flagged as mountable, and ignore the rest, so we know it can be done.

There's no guarantee that any kind of bus/software combination can deal with
things left turned off but still connected.  Most devices have a totally
unknown characteristic when left powered down.  You can actually have a powered
down bus buffer kind of turn on when power from the bus reached its inputs.  
The likely outcome of such a condition is that the whole bus gets dragged 
down.  This has nothing to do with any problems that may or may not be seen
in a system with fully powered up devices.  If such a removable media device
is powered up but not fitted with a disk, there's no hardware reason any system
software shouldn't be able to deal with it.

>On a related note -- is it possible to se a HD partition to SKIP with the
>HDToolbox? With my Supra SCSI controller I was able to set a partition to
>BOOT, MOUNT, or SKIP and thus create partitions that did not mount at boot
>time but that could be mounted later with the AmigaDOS "Mount" command. 

While I have never tried it, HDToolBox does let you designate partitions as
automounted or not, which I guess is the same thing you're talking about
here.

-- 
Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests"
   {uunet|pyramid|rutgers}!cbmvax!daveh      PLINK: hazy     BIX: hazy
      "That's me in the corner, that's me in the spotlight" -R.E.M.