[comp.sys.mac.hardware] Shut off Syquest after boot?

johnsone@uxh.cso.uiuc.edu (03/01/90)

Some time back (a couple weeks ago, I think) there was a discussion of the
Syquest removables and the fact that one can not boot up the Mac if the
Syquest was not already booted due to the fact that the SCSI terminator in
the Syquest needed power to terminate (that is unless the necessary
hardware mod's were made to the Syquest).

Well, my question is, Is there any problem with turning the Syquest off
after the Mac is all boot'ed up?


                                     Erik A. Johnson
                                     Graduate Student, Aero/Astro Engineering
                                     University of Illinois at Urbana-Champaign
                                     johnsone@uxh.cso.uiuc.edu

bill@cambridge.apple.com (Bill St. Clair) (03/01/90)

In article <88500011@uxh.cso.uiuc.edu> johnsone@uxh.cso.uiuc.edu writes:

   Some time back (a couple weeks ago, I think) there was a discussion of the
   Syquest removables and the fact that one can not boot up the Mac if the
   Syquest was not already booted due to the fact that the SCSI terminator in
   the Syquest needed power to terminate (that is unless the necessary
   hardware mod's were made to the Syquest).

   Well, my question is, Is there any problem with turning the Syquest off
   after the Mac is all boot'ed up?

It doesn't work on my machine.  After turing off the Syquest drive, my
internal SCSI disk does not respond (the MAC hangs waiting for disk I/O)
until I turn it back on again.

Bill St. Clair
bill@cambridge.apple.com

psych@watserv1.waterloo.edu (R.Crispin - Psychology) (03/01/90)

I have a DPI removable that has just been upgraded to the new Syquest
mechanism (20ms access time). I can boot my machine with the drive
shut off. Happily, it also appears to no longer have internal
termination.
I don't know if this would apply to other drives.
 
Richard Crispin                        psych@watdcs.UWaterloo.ca
Dept. of Psych/Univ. of Waterloo       psych@watserv1.uwaterloo.ca
Waterloo, Ont.  N2L 3G1
(519)885-1211 ext. 2879