Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!ucsd!usc!ucla-cs!uci-ics!truesdel
From: truesdel@ics.uci.edu (Scott Truesdell)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Syquest-based drives?
Message-ID: <1989Nov13.230505.23646@paris.ics.uci.edu>
Date: 14 Nov 89 07:05:05 GMT
References: <10433@venera.isi.edu> <1904@atanasoff.cs.iastate.edu>, <4ZK9jla00jaPM0flxA@andrew.cmu.edu>
Distribution: comp
Lines: 29

jg2f+@andrew.cmu.edu (Jude Anand George) writes:

>isr@rodan.acs.syr.edu ( ISR group account) writes:
>> I have one of MicroNet's R45 models, (single removable). It's been about
>[..]
>> One interesting point I've noticed is that, if a cartridge is inserted when
>> the Mac powers up, it will appear on the desktop or boot from it, but
>> if a cartrdige is inserted after the Mac has powered up I have to run 
>> something that scans the SCSI bus for the MAc to recognize it. 
>> (The MicroNet S/W, SCSI DA, and Jasmine DriveWare all seem to do this)
>> I don't know if this is common to all Syquests or just this one.

>This is not true of Microtech or PLI drives.  An INIT is provided that
>polls the drive every second for insertions, similar to how the Mac ROMs
>poll the floppy drive.

Charles McConnathy, president of MicroNet, chose to not have an INIT
for two reasons: (1) general INIT proliferation and attendant
conflicts, and (2) the performance hit of polling the bus.

If a cartridge is in during boot, its driver will install itself and
recogize when fresh cartridges are inserted. Personally, I use
Steinberg's "Mount 'Em" Fkey. Optionally, SCSI Tools or SCSI Probe
cdevs will work also, but these are slower than Mount'Em.

  --scott

--
Scott Truesdell