Date: Sun, 17 Apr 2005 11:49:40 -0700 From: Paul Saab <ps@mu.org> To: Mikhail Teterin <mi+kde@aldan.algebra.com> Cc: freebsd-scsi@FreeBSD.org Subject: Re: speed of a ciss-based pseudo-disk Message-ID: <4262AFC4.8010107@mu.org> In-Reply-To: <200504171439.14530@aldan> References: <200504171439.14530@aldan>
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Mikhail Teterin wrote: > Hello! > > I have two U320 SCSI drives in a RAID-0 combination attached to HP's > Smart Array 642. This is the dmesg: > > ciss0: <HP Smart Array 642> port 0xb800-0xb8ff mem > 0xfea80000-0xfeabffff,0xfeafe000-0xfeafffff irq 29 at device 1.0 on pci4 > da0 at ciss0 bus 0 target 0 lun 0 > da0: <COMPAQ RAID 0 VOLUME OK> Fixed Direct Access SCSI-0 device > da0: 135.168MB/s transfers > da0: 69419MB (142171680 512 byte sectors: 255H 32S/T 17423C) > > Why is the reported speed only 135.168MB/s? All equipment is U320, so > I'd expect the nominal speed of 320MB/s... Because it is a bogus number. There's no way to query for this. You're running at full speed. > Also, what, if anything, are people using to monitor/control ciss-based > arrays? HP offers software, but only for Linux and Windows... HP has not released their acu, so you're limited to what the driver reports in syslog.
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