1:1 controller performance under uPort sys V/AT 2.4.0-L

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1 total messages Started by Russell B. Jorgensen Sun, 31 Mar 1991 02:36

#105

Author: Russell B. Jorgensen
Date: Sun, 31 Mar 1991 02:36

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I recently replaced my old 2:1 MFM controller with a 1:1 RLL controller.
However, when benchmarking hard disk performance under Microport System V/AT
Version 2.4.0-L on my 8Mhz 286-AT clone, I discovered that a physical
interleave of 2:1 on my hard disk performed better than a physical interleave
of 1:1.  Does anyone know if there are any parameters in the kernel which
can be tweaked to make 1:1 interleaves efficient?  I've been considering
trying to write a disc driver which reads (and caches) complete tracks,
but that's a pretty difficult job that I'm not too sure I want to tackle.
Has anyone heard of any replacement disc drivers out there which are
any better than what Microport supplies?  Thanks.

Russell B. Jorgensen, AT&T Bell Laboratories, Denver, CO
email: rbj@druhi.att.com  or  ...!att!druhi!rbj

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