Date: Fri, 27 Feb 2009 14:14:49 +0100 From: Julien Cigar <jcigar@ulb.ac.be> To: freebsd-questions@freebsd.org Subject: poor performances with Intel Raid Controller (iir) Message-ID: <1235740489.2747.17.camel@frodon.be-bif.ulb.ac.be>
next in thread | raw e-mail | index | archive | help
Hello, I've a machine with an integrated Intel RAID controller (U320) which uses the iir driver. I have two arrays, one RAID 1 with two disks and one RAID 5 with 8 disks. The disks are all Seagate 320MB/s. The system is running FreeBSD 7.0-RELEASE with 8 processors (2,40 Ghz) and 4GB or RAM. I have very poor performances, around ~50 MB/s, is it normal ? jcigar@bccm-it ~ % dd if=/dev/zero of=blah bs=10M count=100 100+0 records in 100+0 records out 1048576000 bytes transferred in 20.168689 secs (51990290 bytes/sec) Are there any tool to detect what could be the bottleneck(s) ? Thanks, Julien -- Julien Cigar Belgian Biodiversity Platform http://www.biodiversity.be Université Libre de Bruxelles (ULB) Campus de la Plaine CP 257 Bâtiment NO, Bureau 4 N4 115C (Niveau 4) Boulevard du Triomphe, entrée ULB 2 B-1050 Bruxelles Mail: jcigar@ulb.ac.be @biobel: http://biobel.biodiversity.be/person/show/471 Tel : 02 650 57 52
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1235740489.2747.17.camel>