Date: Fri, 4 Jan 2008 12:27:57 +0000
From: Stroller <classiccmp.org at stellar.eclipse.co.uk>
On 3 Jan 2008, at 18:35, John Robertson wrote:
...
What my group of friends (Tech Tools Mail List) are looking for is
a cost effective replacement for the ancient SCSI drives with flash
being an optimum solution, but trying to find the most cost
effective solution...
I've only found one solution (Adtron S35FA) on line ...
I'm not immediately able to find pricing on the Adtron product, but
IDE-SCSI adaptors - to allow you to connact an (E)IDE hard-drive to a
SCSI bus are readily available. CF flash memory cards "talk EIDE" and
again simple pin-out convertors are readily available - and also very
cheap - or you can make your own.
To get specific with part numbers...
Acard makes the Acard 7720 in a few varieties. In this case you'd want
the 7720U probably for its narrow interface (7720UW has 68 pin interface
and there are LVDS flavors as well). This has a narrow (50 pin) single
ended SCSI interface on the upstream side and a regular 3.5" IDE (as
opposed to notebook drive) interface on the downstream side.
It retails for about $70, but there's a fellow selling a boat-load of used
ones on Ebay for $30 each. I have some new ones I'm selling for $39
which include the little power splitter/adapter and a nice instruction
sheet. :-)
Once you have the 7720U, you have two directions you can go. Go as you
planned and get any of the inexpensive IDE<=>CF Card adapters, which
typically cost well under $10.
Geeks.com has an assortment for $5 each
with a dual CF card adapter for $7.50 in their "controllers/adapters"
section.
The other direction you could go is to get a 2.5" to 3.5" drive adapter
for about $5 (again at
geeks.com, there's a cheaper one, but the $5 one
comes with rails as well as circuit board) and add any of the 2.5" IDE
hard drives you can find littering the ground.
There can be gotchas depending on your equipment. One resourceful fellow
in Australia used an IDE to CF card adapter in the PowerBook 150, IIRC,
only to find that the IDE in the PB150 interpreted the device ID of CF
improperly (built before or around time spec was finalized) and would not
recognize it. His solution was to build an adapter board to recognize and
intercept the ID transaction and then let all other transactions pass.
As I mentioned, a resourceful fellow.
The point being, there are possible compatibility problems depending on
the equipment being used.
Jeff Walther