[comp.sys.sgi] SGI add on hard drives

dwatts@ki.UUCP (Dan Watts) (05/30/90)

A while back, someone was discussing add-on hardware for the Personal Iris.
I'm in the process of getting a quote for an external configuration of a
Seagate 700+ MB unformatted drive with enclosure and power supply.  I imagine
the connector that looks like it has a SCSI terminator on it in the back of
the Personal Iris is where I'd connect it.

Does anyone have any personal experience with Seagate drives and their
reliability?

If the drive comes unformatted, what will I need to do to get it up and
running?  I presume there's got to be man pages somewhere....
I found mkfs in the man pages.  So where does one go to figure out what
the parameters to mkfs are? I presume that most come from the drive
specifications, but what about the "special" file they refer to?  There's
quite a few entries in /dev/dsk.

So, getting it up and running should be to set the SCSI address uniquely,
format the drive, and reboot?

Any help is greatly appreciated.
-- 
#####################################################################
# CompuServe: >INTERNET:uunet.UU.NET!ki!dwatts    Dan Watts         #
# UUCP      : ...!uunet!ki!dwatts                 Ki Research, Inc. #
############### New Dimensions In Network Connectivity ##############

davis@ADENOSINE.PHARM.UTAH.EDU ("Darrell R. Davis") (05/30/90)

on Tue, 29 May 90 18:09:09 CDT,
Mike Goss <goss@snow-white.merit-tech.com> said:
Mike> Posted-Date: Tue, 29 May 90 18:09:09 CDT
Mike> Received-Date: Tue, 29 May 90 18:31:12 MDT

> From: Dan Watts <ki!dwatts@uunet.uu.net>

Mike> Seagate bought Imprimis (formerly the disk drive division of CDC)
Mike> recently, so the Seagate drive you are looking at may actually be an

I have installed several Imprimis drives on PI's, a couple of 380's
and also 2 766's.  The 380's were from SGI and I bought the 760's raw
from a company called Almac in Seattle.  In addition, I know of a
third party vendor who is putting together a SCSI tower that holds 4
disks (take your pick from 380, 760 or 1600 Mbyte).  Some of this I've
posted before.  Anyway, the fx utility seems to work fine for all of
these guys, though I haven't personally tried it on the 1.2's.  As I
see it, the key to the process is to set the SCSI address correctly
(with jumpers) I believe 5 and 2 are the most commonly used. The
system gets upset if there is an address conflict, this is from
experience.  Power up the machine, then check that everything is
hunky-dory using the hinv command.  You can then format the disk using
fx, I actually found the man page comforting in this case to convince
yourself that you are not re-formatting your other disks.  Supposedly
fx will correctly format a 1.2G (I hear this is an overnight
proposition).  To set up the file system, SGI provides a nice script
called 'Add_disk' there is a man page for Add_disk, basically it does
all of the steps required to create the filesystem and mount it.

P.S.  One of the CDC 760's has been going for about 1.2 years, the
other for 6 months.   

--------------------------------------------------------------
                           *                                  
Darrell R. Davis       *   *   *    "Faster, faster, until the
Assistant Professor      * * *       thrill of speed overcomes
Medicinal Chemistry   *A**L**T**A*   the fear of death."
University of Utah       * * *       
                       *   *   *       --H.S. Thompson 
                           *
--------------------------------------------------------------