Date: Wed, 17 Mar 1999 11:27:12 +0000 ( ) From: Michael Nelson <nelson@seahunt.imat.com> To: klein002@bama.ua.edu Cc: amlai@columbia.edu, aic7xxx@FreeBSD.ORG Subject: Re: aic7895, IBM 9ZX, Quantum Viking, slow transfer rates Message-ID: <199903171127.DAA04425@seahunt.imat.com> In-Reply-To: <Pine.SOL.4.02A.9903162240330.19502-100000@bama.ua.edu>
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-> 100 mb with bonnie is not a representative benchmark of _disk_ speed. use
-> 4 x your amount of physical memory.
Just as a datapoint, I ran bonnie with 512MB file size (I have 128MB
RAM, using an Adaptec AHA2940-U2W card and IBM 9LZX DRVS-09V). Note
that I don't yet have an LVD cable so this drive is running in ULTRA2/SE
mode (40MB/sec). This is a Celeron 400 o/c to 450 on an Asus P2B MB with
1008 BIOS:
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
IBM DRVS 512 6535 93.7 15863 21.0 5694 14.9 5546 89.5 16018 14.1 91.5 1.6
And the same test on my Quantum Viking 2.3NSE Ultra Narrow running on a 2940
Ultra controller, same machine:
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
Quantum 512 5640 80.9 6207 8.2 3099 7.1 5293 84.7 10036 8.1 67.6 1.1
Michael
--
"I am not a paranoid." - Randy
Michael Nelson San Francisco, CA nelson@imat.com
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