From owner-freebsd-scsi@FreeBSD.ORG  Fri May  6 12:20:43 2005
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Date: Fri, 6 May 2005 14:19:43 +0200
From: Herve Boulouis <amon@sockar.homeip.net>
To: Anton Turygin <pa3op@tsua.net>
Message-ID: <20050506121942.GB71715@ra.aabs>
References: <20050506130002.L13748@colt.tsua.net>
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cc: freebsd-scsi@freebsd.org
Subject: Re: Adaptec 2120S FreeBSD 4.11 poor performance
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Le 06/05/2005  13:09, Anton Turygin a écrit:
> 
> The speed in the array doesn't raise over 7 MB/s.
> Can anyone help me to figure out?
> Thanks in advance.

A common thing to do is to disable the read cache and only enable
write caching for your container.

CLI > open aac0
Executing: open "aac0"

AAC0> container show cache 0
Executing: container show cache 0

Global Container Read Cache Size  : 0
Global Container Write Cache Size : 16203776

Read Cache Setting        : DISABLE
Write Cache Setting       : ENABLE ALWAYS
Write Cache Status        : Active, not protected, battery not present 

Hope this helps.

-- 
Herve Boulouis