From owner-freebsd-questions Thu Jun 22 7:33:29 2000 Delivered-To: freebsd-questions@freebsd.org Received: from backup.af.speednet.com.au (af.speednet.com.au [202.135.188.244]) by hub.freebsd.org (Postfix) with ESMTP id 6513C37B680 for ; Thu, 22 Jun 2000 07:33:24 -0700 (PDT) (envelope-from andyf@speednet.com.au) Received: from backup.af.speednet.com.au (andyf@backup.af.speednet.com.au [172.22.2.4]) by backup.af.speednet.com.au (8.9.3/8.9.3) with ESMTP id AAA04492; Fri, 23 Jun 2000 00:33:16 +1000 (EST) (envelope-from andyf@speednet.com.au) Date: Fri, 23 Jun 2000 00:33:15 +1000 (EST) From: Andy Farkas X-Sender: andyf@backup.af.speednet.com.au To: chris.smith@raytheon.co.uk Cc: freebsd-questions@FreeBSD.ORG Subject: Re: SCSI vs ATA disks In-Reply-To: <961669213.3951e85d3373a@www.tdyc.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Thu, 22 Jun 2000 chris.smith@raytheon.co.uk wrote: > My box is thrashing badly with 30 users over telnet doing various things (cur > specs:- 233/128M/20G ATA33 disk)! vmstat shows that memory really isn't a > problem (it hardly touches swap) but it's in iowait 70% of the time (excuse the > solaris term). It's being upped to a P2/400 with 256M RAM and a nice Asus > board next week but is still stuck disk wise (I assume that is whats really > causing the problems). More memory will definately help... > Is it worth putting a 2-4 SCSI-UW disks in instead? If so, what is likely to > be the best cost/performance economy:- > > 4 x 4.5Gb disk > 2 x 9.1Gb disk In my unexperienced eyes, more spindles == better performance, and even better is to have each spindle on its own controller... so for better performance, get 4 x 4.5Gb disks AND 4 controllers AND run vinum or ccd. -- :{ andyf@speednet.com.au Andy Farkas System Administrator Speednet Communications http://www.speednet.com.au/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message