Adding SCSI drive to RT.

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2 total messages Started by Sam Moore Thu, 01 Jun 1989 13:28

#1817

Author: Sam Moore
Date: Thu, 01 Jun 1989 13:28

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Has anyone experience with adding a SCSI drive to an RT? I have
a 6151 with the 70 meg. ESDI disk now. I want to add a SCSI
drive to the thing. I am currently running AIX 2.2.1, but I
am thinking of running AOS 4.3.

Any comments on AOS and/or SCSI drives on the RT?

Sam

Re: Adding SCSI drive to RT.

#1819

Author: Steve Dyer
Date: Thu, 01 Jun 1989 15:43

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In article <3091@ncsuvx.ncsu.edu> sam@cave.ncsu.edu (Sam Moore) writes:
>Any comments on AOS and/or SCSI drives on the RT?

IBM's SCSI host interface works "out of the box" with their 678 "Athens" 200mb
and 400mb humongous 14" drives.  This may be out of your league -- size,
price and power-wise.  I suspect that it will work with other SCSI disks,
but it would probably require some amount of driver hacking.

I can't comment on AIX, but if you're running AOS 4.3, I highly,
highly, highly recommend avoiding the IBM SCSI interface and getting
Christer Bernerus' driver for the Adaptec AHA-1450A SCSI interface, a
PC/AT board which is very inexpensive: < $300.  His 4.3 device driver
is written the RIGHT way, so that device drivers of all types can be
slipped beneath the generic controller code.  He provides a Maxtor
4380S hard disk driver and a SCSI streaming tape driver, both of which
give you adequate boilerplate to write a driver for any kind of SCSI
device you want--I'm working on a CD-ROM driver right now based on his
hard disk driver.  I got the disk driver working with a Newbury Data 4380S
unit with a minimum of tweaking (mainly in defining the templates for
the MODE SENSE command, since different drives return different
pages.)  A Maxtor 4380S should work out of the box.

His code comes with a standard university-style disclaimer/copyright.
I don't know what his opinion is regarding this publicity, but I am
one very pleased individual.  His address in Sweden is
	bernerus@utc.chalmers.se.

-- 
Steve Dyer
dyer@ursa-major.spdcc.com aka {ima,harvard,rayssd,linus,m2c}!spdcc!dyer
dyer@arktouros.mit.edu

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