Date: Sat, 8 Apr 1995 08:54:45 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> To: wilko@yedi.iaf.nl (Wilko Bulte) Cc: smpatel@wam.umd.edu, hackers@FreeBSD.org Subject: Re: large filesystems/multiple disks [RAID] Message-ID: <199504081554.IAA15309@gndrsh.aac.dev.com> In-Reply-To: <199504080829.KAA02104@yedi.iaf.nl> from "Wilko Bulte" at Apr 8, 95 10:29:54 am
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> > [del] > > > Your choice of controllers was poor. I have run 2 drives on a 1742 > > doing iozone to both drives at the same time (3+MB/sec each drive) > > for a controller throughput of 6MB/sec. > > I have run 2 4MB/sec drives on an NCR 825 based controller and got > > 7+MB/sec combined throughtput. > > > > Ultrastore controllers have become famous for there in ability to do > > a decent job of getting data to and from the disk. > > > Rod Grimes rgrimes@gndrsh.aac.dev.com > > ? As an owner of U24F card I'm interested in what is wrong with 'm? Is > grief and misery lurking somewhere ;-) ? No, they just don't perform well. The scsi command over head is high on them. I am not sure if this applies to the 24F, but the 34F is a bus pig (it grabbs the vlb bus for long periods of time, locking out other interrupts :-(). They are reliable boards, just not fast boards. -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Custom computers for FreeBSD
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