Date: Wed, 11 Apr 2007 12:25:28 +0200 From: Ivan Voras <ivoras@fer.hr> To: thwang@mail.nhcue.edu.tw Cc: freebsd-hardware@freebsd.org Subject: Re: the performance of SAS is not better than SCSI in FreeBSD, WHY? Message-ID: <461CB798.8010501@fer.hr> In-Reply-To: <224a745a0704110245n30b2859ew7673406e33b61b10@mail.gmail.com> References: <224a745a0704092137h67f5f463w6b355535a6b8415f@mail.gmail.com> <evgqk5$du4$1@sea.gmane.org> <224a745a0704110245n30b2859ew7673406e33b61b10@mail.gmail.com>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig07823BA531A513F2CDC1AC08 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable 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. --------------enig07823BA531A513F2CDC1AC08 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iD8DBQFGHLeYldnAQVacBcgRAoDOAJ9msx7YaXhQvt4s+kHn3zew6GkNMACg77I+ wzhf5hTJGL3qHYiwsArQ9cw= =aI9d -----END PGP SIGNATURE----- --------------enig07823BA531A513F2CDC1AC08--
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