From owner-freebsd-scsi  Mon Jul 19  5:37: 3 1999
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Date: Mon, 19 Jul 1999 13:38:06 +0100
From: Stuart Henderson <stuart@eclipse.net.uk>
Organization: Eclipse Networking Ltd.
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To: Freedom Bert <freenerd@hotmail.com>
Cc: scsi@freebsd.org
Subject: Re: Proliant 400 and Vikings II doing only 40MB/s
References: <19990719121148.63023.qmail@hotmail.com>
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> It came with a built-in onboard SCSI, an Integrated Single Channel
> Wide-Ultra2 SCSI controller  ( really a Symbios 53c895 )

here is some rope :) I have used this on our webcache since 
3.1-stable shortly before 3.1-release, as far as I can tell, it's 
been no less reliable than servers using identical hardware 
running at 40MB/s.

add the following to your kernel config,

   options SCSI_NCR_DFLT_SYNC=10

you should probably make clean && make depend && make all when
building it.

da1 at ncr0 bus 0 target 1 lun 0
da1: <HP 9.10GB A 80-6331 > Fixed Direct Access SCSI-2 device
da1: 80.000MB/s transfers (40.000MHz, offset 15, 16bit), Tagged Queueing
Enabled
da1: 8678MB (17773524 512 byte sectors: 255H 63S/T 1106C)
da0 at ncr0 bus 0 target 0 lun 0
da0: <HP 9.10GB A 80-DC1B DC1B> Fixed Direct Access SCSI-2 device
da0: 80.000MB/s transfers (40.000MHz, offset 15, 16bit), Tagged Queueing
Enabled
da0: 8678MB (17773524 512 byte sectors: 255H 63S/T 1106C)

BTW for anyone interested: the 895 support in FreeBSD works on more 
machines (specifically, HP LH4r - not tried in raid mode just as a 
standard controller) than Linux (redhat6, which fails at loading 
scripts code stage).


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