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- From: olson@anchor.esd.sgi.com (Dave Olson)
- Subject: Re: Should I Get a Barracuda for My Indigo?
- Message-ID: <shiilg0@zuni.esd.sgi.com>
- Keywords: disk drive
- Sender: news@zuni.esd.sgi.com (Net News)
- Organization: Silicon Graphics, Inc. Mountain View, CA
- References: <1992Nov18.192526.9440@ringer.cs.utsa.edu>
- Date: Wed, 18 Nov 92 23:13:47 GMT
- Lines: 36
-
- In <1992Nov18.192526.9440@ringer.cs.utsa.edu> senseman@ricky.brainlab.utsa.edu (David M. Senseman) writes:
-
- | SGI machines in general and Indigos in particular seem to work
- | well with disk drives from Seagate. Now Seagate has introduced
- | a really interesting drive -- the BARRACUDA -- 2.1 GB in a 3 1/2
- | inch form factor. It should be much faster than the IBM drive
- | SGI is currently shipping since it comes with a 1,024KB cache,
- | giving it an 8 ms access time :-) Best of all, Seagate has priced
- | them very competitively ($2,495 in OEM quantitites).
- |
- | Has anyone (Dave?) had a chance to look at the ST12550 (Barracuda)
- | and/or the other members of the family (i.e. ST12400, ST31200)?
-
- No. I'd be very surprised if you could go order one and actually
- get it. I can't say much more because of non-disclosure agreements,
- but think about how long it was between announcements of 3.5" 1+GB
- drives and general availability...
-
- | If someone did buy an ST12550, and put it in an R4K Indigo,
- | could the Indigo's SCSI contoller take advantage of the drive's
- | support for FAST and FAST/WIDE SCSI-2?
-
- Indigo (all r4k and all the newer r3k) has a SCSI chip capable of fast
- SCSI, but the DMA controller can't handle the full 10 MB a second the
- chip is capable of. We can only sustain 5.5 MB/s. Future machines
- have a newer DMA controller that allows for 10MB/s. However, even at
- 5.5MB/s, we are still faster than the drive rate of any *single* SCSI
- drive, although drives are fast approaching that.
-
- This is something I've mentioned a number of times, and have really
- tried to beat into our sales and marketing folks, since visions of 10
- MB/s sustained seem to keep dancing through their heads ;)
- --
- 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
-