Date: Thu, 07 Apr 2005 11:21:49 +1000 From: Carl Makin <carl@xena.IPAustralia.gov.au> To: Eugene Mitrofanov <eugene@imedia.ru> Cc: freebsd-questions@freebsd.org Subject: Re: IBM eServer 346 ServeRaid is too slow Message-ID: <42548B2D.9010503@xena.ipaustralia.gov.au> In-Reply-To: <200504061842.43294.eugene@imedia.ru> References: <200504061842.43294.eugene@imedia.ru>
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Hi Eugene, Eugene Mitrofanov wrote: >I've got Subj and FreeBSD-5.4PRE on it. But RAID0 is too slow: >root@beta:eugene# dd if=/dev/zero of=/var/tmp/1 bs=1m count=100 >100+0 records in >100+0 records out >104857600 bytes transferred in 31.949508 secs (3281979 bytes/sec) > >mpt0: <LSILogic 1030 Ultra4 Adapter> port 0x4000-0x40ff mem >0xcffe0000-0xcffeffff,0xcfff0000-0xcfffffff irq 28 at device 1.0 on pci4 > > >da0 at mpt0 bus 0 target 0 lun 0 >da0: <LSILOGIC 1030 IM IM 1000> Fixed Direct Access SCSI-2 device >da0: 320.000MB/s transfers (160.000MHz, offset 127, 16bit), Tagged Queueing >Enabled >da0: 34678MB (71020544 512 byte sectors: 255H 63S/T 4420C) > > I'd say you are seeing the same as I am with the same card in a Dell 1855. There is something wrong with the mpt driver and the disks when they are setup in a raid0 set. If you split the disks and use them as individual drives then you will get full performance. Carl.
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