Date: Wed, 24 Mar 2004 16:53:44 +0100 (CET) From: Olaf Hoyer <ohoyer@ohoyer.de> To: Nelis Lamprecht <nelis@brabys.co.za> Cc: freebsd-hardware@freebsd.org Subject: Re: Slow transfer speeds with U320 drives and HP Smart Array 641 Message-ID: <20040324164836.Q61406@gaff.hhhr.ision.net> In-Reply-To: <1080114966.33376.276.camel@enigma.8ball.co.za> References: <1080114966.33376.276.camel@enigma.8ball.co.za>
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On Wed, 24 Mar 2004, Nelis Lamprecht wrote: > Hi, > > With the ciss driver on my HP ProLiant ML350 I've noticed the transfer > speed on my RAID controller is only. > > da0 at ciss0 bus 0 target 0 lun 0 > da0: <COMPAQ RAID 1 VOLUME OK> Fixed Direct Access SCSI-0 device > da0: 135.168MB/s transfers > da0: 69459MB (142253280 512 byte sectors: 255H 32S/T 17433C) > > Both my drives on the RAID controller are U320 72GB pluggable SCSI's. > The RAID card also has the optional 64MB battery backed write back cache > enabler installed. Hi! well, I also see the possibility that in this case, the theoretical transfer limit of the PCI Bus is displayed... Yes, the the controllers are 64bit, but... would explain a bit. Just my 2 Cents Olaf -- Olaf Hoyer ohoyer@gaff.hhhr.ision.net Fuerchterliche Erlebniss geben zu raten, ob der, welcher sie erlebt, nicht etwas Fuerchterliches ist. (Nietzsche, Jenseits von Gut und Boese)help
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