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Article #2794Re: Alternate IPI disks in a Sun
From: Hugh LaMaster
Date: Thu, 01 Mar 1990 01:55
Date: Thu, 01 Mar 1990 01:55
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In article <10538@alice.UUCP> andrew@alice.UUCP (Andrew Hume) writes: >listen, if you have an ipi interface, do yourself a favour >and get some real disks. For example, the Sabre 2HP is only >a little more expensive than the regular sabre, a tad smaller >but twice as fast. I assume that you mean 6 MB/sec. I guess Sun doesn't sell these. Are there any problems with drivers/formatting/etc? Can you just plug them in and run? I thought the filesystem was the bottleneck. The best you can get out of a 3 MB/sec disk is ~2MB/sec now. What kind of speeds can you get out of a 6 MB/sec disk? I believe that the maximum throughput to memory on a Sun-4/490 is 13.4MB/sec based on the paper by Hsieh et al. in last falls IEEE Computer Design. Do you have any insight into the aggregate performance improvement with faster disks? Hugh LaMaster, m/s 233-9, UUCP ames!lamaster NASA Ames Research Center ARPA lamaster@ames.arc.nasa.gov Moffett Field, CA 94035 Phone: (415)604-6117
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!elroy.jpl.nasa.gov!ames!ames.arc.nasa.gov!lamaster From: lamaster@ames.arc.nasa.gov (Hugh LaMaster) Newsgroups: comp.periphs Subject: Re: Alternate IPI disks in a Sun Message-ID: <43941@ames.arc.nasa.gov> Date: 1 Mar 90 01:55:52 GMT References: <5048@emory.mathcs.emory.edu> <43841@ames.arc.nasa.gov> <10538@alice.UUCP> Sender: usenet@ames.arc.nasa.gov Organization: NASA - Ames Research Center Lines: 23