exodus@uop.UUCP (Freddy Kreuger) (10/24/87)
Since I have had a few requests, here is what should be done to add more
storage to a SH204 drive....
Make or buy a 34 conductor ribbon cable with three card-edge connectors.
Make or buy a n-conductor (I have no idea-- 14 I think) ribbon cable, female
pin connector one end, card edge the other (duplicate the existing cable
leading to the 3.5" drive already in the SH204).
Make or buy (!) a bigger power supply. Maybe a nice cabinet if you want
everything in one box. Probably would be safer.
Buy a nice hard drive of nearly any size, any IBM XT compatible drive should
work, I think the name of the standard is ST506. Connect both drives to the
controller board with the three connector, 34 conductor cable. Then plug the
new drive into the second n-pin connector on the controller board. The drive
(new one) will have a jumper somewhere to make it device #2 (drive #2). Fix
that.
Use Supra's formatter to format the new drive (SCSI 0, LUN 1). It should
work.
I, of course, claim no responsibility for any claims of damages or lost
information as a result of following the instructions in this article.
I have not done this yet as I have no power supply and the internal SH204
supply can not support much else than it already does. I _have_ though
unplugged the internal Tandem drive and replaced it with a Micropolis
1304 44 Meg (unf.) drive and it works wonderfully. The 28ms seek time
is definitely noticeable. I also recommend the Beckemeyer Hard Disk
accelerator. I can use GULAM to produce a recursive directory (60 folders,
the root only has 3, 460 files) without accessing the drive at all with a
64k cache buffer!!
Greg Onufer GEnie: G.ONUFER University of the Pacific
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