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- Path: sparky!uunet!olivea!sgigate!odin!fido!zola!twilight!zuni!anchor!olson
- From: olson@anchor.esd.sgi.com (Dave Olson)
- Newsgroups: comp.sys.sgi
- Subject: Re: SCSI disk info please.
- Message-ID: <njg5qjo@zuni.esd.sgi.com>
- Date: 22 Jul 92 01:33:41 GMT
- References: <2804@contex.contex.com> <ni3j6m8@zuni.esd.sgi.com> <2808@contex.contex.com>
- Sender: news@zuni.esd.sgi.com (Net News)
- Organization: Silicon Graphics, Inc. Mountain View, CA
- Lines: 37
-
- In <2808@contex.contex.com> frank@marvin.contex.com (Frank Perdicaro) writes:
- | In article <ni3j6m8@zuni.esd.sgi.com> olson@anchor.esd.sgi.com (Dave Olson) writes:
- | >In <2804@contex.contex.com> frank@marvin.contex.com (Frank Perdicaro) writes:
- | >
- | >| Can anybody out there comment on these SCSI disks? Do they work with the
- | >| 4.0.x IRIX, and what are they? Thanks.
- | >|
- | >| Maxtor XT8383S 5.25", 383Mb? Too slow for sync. SCSI.
- | >| Maxtor XT8760S 5.25", 760Mb? Too slow for sync. SCSI.
- | >
- | >Sync SCSI works on these drives, I'm not sure what 'Too slow' means;
- | >it does improve the transfer rate for SGI systems. The are a generation
- | >or 2 old now, but may still be sufficient for your needs.
- | >
- | I have used these two drives a bit, and found that they work just fine
- | on a 4D20 running any IRIX. Having personally upgraded about a dozen
- | of theses ( 4D20/Maxtor ) to 4D25s, I found that in all but 1, the disk
- | could not keep up in sync. mode, and IRIX would panic. Our experience
- | in the field confirmed my experience in house.
-
- Then you got drives with broken firmware, or something was misconfigured.
- Our eval drives ran fine (I had an 8760 as my root drive for several
- months, and believe, it was running in sync mode!).
-
- Besides that, the analysis doesn't quite make sense. I could name
- one of dozens of potential firmware bugs that could cause something
- to get hung up on the bus, and very few of them have anything to do
- with 'keeping up'.
-
- Unless you were running 3.2 though, I'm surprised to hear it panic'ed
- the system, unless you were getting very frequent SCSI bus resets,
- in which case sooner or later you will cause a disk error that we
- can't recover from (in particular, a couple of places in the swap code).
- --
- Let no one tell me that silence gives consent, | Dave Olson
- because whoever is silent dissents. | Silicon Graphics, Inc.
- Maria Isabel Barreno | olson@sgi.com
-