From: Russell Coker <bofh@coker.com.au>
To: linux-lvm@sistina.com, Scott Laird <laird@internap.com>
Cc: zoo1@corecomm.net
Subject: Re: [linux-lvm] hard drive shock tolerance
Date: Mon, 15 Jan 2001 15:37:24 +1100 [thread overview]
Message-ID: <01011515372404.01200@lyta> (raw)
In-Reply-To: <Pine.LNX.4.21.0101121331460.13252-100000@lairdtest1.internap.com>
On Saturday 13 January 2001 08:41, Scott Laird wrote:
> On Sat, 13 Jan 2001, Russell Coker wrote:
> > Given a choice I prefer hard drives with lower rotational speeds because
> > of the lesser heat production. Read the spec sheets and you'll see that
> > as a general rule 10K rpm drives use twice as much power as 7200 rpm
> > drives, twice the power == twice the heat!
>
> Hmm. Seagate's current 9GB 7200 RPM drive, the ST39236LC draws 7W when
> idle. Their current 9 GB 10k RPM drive, the ST39204LC draws 8.5W when
> idle. IMHO, that's not really very significant anymore, especially when
> your CPU eats 20-70W. Both of these numbers are way better then drives
> only a generation or two back -- last year's ST39175 (9 GB, 7200 RPM) drew
> 9.75W when idle.
I've just done some more research on this, IBM Deskstar workstation drives
40G:
7200RPM - 6.7W idle
5400RPM - 4.9W idle
IBM UltraStar server drives 36G:
Ultra 160SCSI 10K rpm - 7.4W idle
FCAL 10K rpm - 9.4W idle
Ultra 160SCSI 7200rpm - 8.9W idle
These results surprise me. It seems that the only way of significantly
reducing power by using a lower speed is when using Deskstar IDE drives.
Also I am curious as to why a drive that uses FC-AL will take so much more
power because of it!
My previous message on this topic was based on information that is (now)
obviously out of date.
--
http://www.coker.com.au/bonnie++/ Bonnie++ hard drive benchmark
http://www.coker.com.au/postal/ Postal SMTP/POP benchmark
http://www.coker.com.au/projects.html Projects I am working on
http://www.coker.com.au/~russell/ My home page
prev parent reply other threads:[~2001-01-15 4:37 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-06 23:54 [linux-lvm] any way to locate vg's on, say, /etc? Steven Lembark
2001-01-07 7:27 ` Russell Coker
2001-01-07 19:47 ` Joe Thornber
[not found] ` <0101090031381K.05036@lyta>
[not found] ` <3A5AAF8C.305C862D@wrkhors.com>
2001-01-09 14:39 ` Russell Coker
2001-01-11 0:54 ` [linux-lvm] hard drive shock tolerance zoo1
2001-01-12 18:51 ` Russell Coker
2001-01-12 21:41 ` Scott Laird
2001-01-15 4:37 ` Russell Coker [this message]
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