Date: Wed, 11 Apr 2007 20:09:21 +0800 From: "Tzu-Hua Wang" <biogary@gmail.com> To: "Ivan Voras" <ivoras@fer.hr> Cc: freebsd-hardware@freebsd.org Subject: Re: the performance of SAS is not better than SCSI in FreeBSD, WHY? Message-ID: <224a745a0704110509o17941a25tc1d4b8080f0841e6@mail.gmail.com> In-Reply-To: <461CB798.8010501@fer.hr> References: <224a745a0704092137h67f5f463w6b355535a6b8415f@mail.gmail.com> <evgqk5$du4$1@sea.gmane.org> <224a745a0704110245n30b2859ew7673406e33b61b10@mail.gmail.com> <461CB798.8010501@fer.hr>
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2007/4/11, Ivan Voras <ivoras@fer.hr>: > > Tzu-Hua Wang wrote: > > Hi: > > > > Thank you for your response. > > > > 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 > 2.5" or 3.5" disks? 2.5" > The SAS Chip of my HP ProLiant DL380 G5 is Smart HP Smart Array P400. > > 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. > > > > I configure my SAS HD as RAID 0. > > > > Will this affect the performance? > > RAID should be much faster than RAID1 for the kind of tests diskinfo > performs. > > Do you mean that RAID 0 perform better than RAID 1? How about RAID 5? Thank you
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