From owner-freebsd-scsi  Tue Apr  7 12:39:47 1998
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Date: Tue, 7 Apr 1998 15:37:23 -0400 (EDT)
From: Kyle McPeek <kyle@stdio.com>
To: freebsd-scsi@FreeBSD.ORG
Subject: CAM Performance...
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Hi All,

For a project at work I need to be able to write 400MB sequentially to an 
Ultra-Wide harddisk (Seagate ST32171W 2GB) from an nfs mounted drive as 
fast a possible.  right now we have it down to around 3:45 seconds using 
the old scsi code.

I am using dd with bs=27163 (Approximately = data on one track) to write 
to /dev/rsd0s2c.

Would the cam code improve sequential scsi writes?  Also, what sort of 
general speed improvements has everyone seen using the cam code?

I do still plan to test the cam code myself, but I would like to know 
what other people have experienced.

Kyle McPeek
TEKsystems Consultant at 
Lexmark International.

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