Date: Fri, 23 Jun 2000 00:33:15 +1000 (EST) From: Andy Farkas <andyf@speednet.com.au> To: chris.smith@raytheon.co.uk Cc: freebsd-questions@FreeBSD.ORG Subject: Re: SCSI vs ATA disks Message-ID: <Pine.BSF.4.10.10006230025490.535-100000@backup.af.speednet.com.au> In-Reply-To: <961669213.3951e85d3373a@www.tdyc.com>
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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/
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