Date: Thu, 09 Oct 1997 23:32:02 -0700 From: Darryl Okahata <darrylo@mina.sr.hp.com> To: hardware@FreeBSD.ORG Subject: Re: Assembling new machine Message-ID: <199710100632.AA100695123@mina.sr.hp.com> In-Reply-To: Your message of "Thu, 09 Oct 1997 07:25:16 %2B0200." <19971009072516.54187@keltia.freenix.fr>
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Ollivier Robert <roberto@keltia.freenix.fr> wrote:
> If you don't need a 7200 rpm drive, IBM has several good drives at 5400
> rpm. They run slower but also cooler than 7200 ones. I have a DORS-32160 (2
> GB) and a DCAS-34330W (4 GB) and they run fine. Both are Ultra and the
> 34330W is of course also wide.
Let me second the recommendation for the IBM 5400RPM DCAS 34330.
Although it's only a 5400 RPM drive, it's relatively fast -- comparable
to my old Quantum Atlas I's, which are 7200RPM drives. The IBM is also
a *lot* quieter and a *lot* cooler. The 4GB version is also pretty
inexpensive at $399 (http://www.basoncomputer.com), although this is for
a bare drive *without* instructions (you can get the basic information
off a sticker on the drive, or you can go to IBM's web site for detailed
drive information).
[ A couple of months back, I asked here for recommendations for quiet
drives, and the IBM was what I got based upon the responses. The
IBM's a very nice drive, but it's pretty hard to find. ]
Here are some bonnie results, based upon 2.2.1, a P133, NCR810,
64MB RAM, & 4GB drives:
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
IBM DCAS 256 4777 91.3 5550 21.7 1891 12.2 5066 92.6 6274 25.1 74.8 3.1
Atlas I 256 3350 66.8 3387 14.8 2027 15.9 4671 90.0 6065 24.6 87.5 4.1
Both of these tests were done with the drives over 3/4s full, so these
numbers reflect measurements on the inner tracks.
IOZONE numbers (256MB file, inner tracks):
IBM DCAS:
5641066 bytes/second for writing the file
6355852 bytes/second for reading the file
Quantum Atlas I:
3464032 bytes/second for writing the file
6176476 bytes/second for reading the file
-- Darryl Okahata
Internet: darrylo@sr.hp.com
DISCLAIMER: this message is the author's personal opinion and does not
constitute the support, opinion, or policy of Hewlett-Packard, or of the
little green men that have been following him all day.
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