From owner-freebsd-hackers Sat Apr 8 08:55:13 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id IAA17353 for hackers-outgoing; Sat, 8 Apr 1995 08:55:13 -0700 Received: from gndrsh.aac.dev.com (gndrsh.aac.dev.com [198.145.92.241]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id IAA17347 for ; Sat, 8 Apr 1995 08:55:10 -0700 Received: (from rgrimes@localhost) by gndrsh.aac.dev.com (8.6.8/8.6.6) id IAA15309; Sat, 8 Apr 1995 08:54:46 -0700 From: "Rodney W. Grimes" Message-Id: <199504081554.IAA15309@gndrsh.aac.dev.com> Subject: Re: large filesystems/multiple disks [RAID] To: wilko@yedi.iaf.nl (Wilko Bulte) Date: Sat, 8 Apr 1995 08:54:45 -0700 (PDT) Cc: smpatel@wam.umd.edu, hackers@FreeBSD.org In-Reply-To: <199504080829.KAA02104@yedi.iaf.nl> from "Wilko Bulte" at Apr 8, 95 10:29:54 am X-Mailer: ELM [version 2.4 PL23] Content-Type: text Content-Length: 1078 Sender: hackers-owner@FreeBSD.org Precedence: bulk > > [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