aic7895, IBM 9ZX, Quantum Viking, slow transfer rates

[Michael Nelson]

-> 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 at imat.com


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