Date: Fri, 11 Aug 1995 19:07:12 +0930 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: rgrimes@gndrsh.aac.dev.com (Rodney W. Grimes) Cc: msmith@atrad.adelaide.edu.au, john@zyqad.co.uk, freebsd-hardware@freebsd.org Subject: Re: Upgrade to my machine Message-ID: <199508110937.TAA03196@genesis.atrad.adelaide.edu.au> In-Reply-To: <199508110859.BAA03829@gndrsh.aac.dev.com> from "Rodney W. Grimes" at Aug 11, 95 01:59:32 am
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Rodney W. Grimes stands accused of saying: > > Generally, the 1G disk will perform better than a 1/2 price 500M unit, > > so two disks is false economy. > > This is absolutly the opposite of the real situation. 2 disk drives of > 1/2 the size and identical performance characteristecs give you 2 spindles But that's what I'm getting at; if you take a 1G disk that costs twice as much as some other 500M disk, it'll generally have _better_ performance characteristics. > that can be doing data trasfer at the same time and with proper load > balancing gives 2 times the over all performance. I have sold off _all_ > of my 1 and 2G drives and now stack 535MB 5400RPM 4.4MB/sec drives up to meet > what ever capacity I need. My make world times are down 45 minutes or so due It's nice if you can afford it; here the price point is on the 1G disks, so that's what I recommend. It's an interesting approach, though. I'm speccing up a new workstation, so I might see how it pans out as compared to a 4G Micropolis M3243. > > You can only boot from the first two disks in the system. IDE disks count > > first, then SCSI, so you can only boot from a SCSI disk if there's only > > one IDE. > > If you have only scsi disks you can boot from drive 5 if you like, unless > someone again has broken that piece of code :-(. That's dependant on BIOS support for more than two disk drives; certainly for the Ultrastor controller that's optional (and has caused problems with other non-operating systems). I don't recall what the situation is with other controllers 8/. > Rod Grimes rgrimes@gndrsh.aac.dev.com -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] My car has "demand start" - Terry Lambert [[
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