From owner-freebsd-hardware@FreeBSD.ORG  Thu Apr 12 06:18:14 2007
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Date: Wed, 11 Apr 2007 12:25:28 +0200
From: Ivan Voras <ivoras@fer.hr>
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Cc: freebsd-hardware@freebsd.org
Subject: Re: the performance of SAS is not better than SCSI in FreeBSD, WHY?
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Tzu-Hua Wang wrote:
>    Hi:
>=20
>    Thank you for your response.
>=20
>    Ther performance of your server is significantly better than mine.

Only in seek times, but this may be an artifact of RAID1. Do you use=20
2.5" or 3.5" disks?

>    The SAS Chip of my HP ProLiant DL380 G5 is Smart HP Smart Array P400=
=2E

Mine was E200i.

>    It uses the FreeBSD driver ciss0

Same here.

>    I think that there is only one difference between your HP server and=

>    mine.
>=20
>    I configure my SAS HD as RAID 0.
>=20
>    Will this affect the performance?

RAID should be much faster than RAID1 for the kind of tests diskinfo=20
performs.


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