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From: Michael Weissenbacher <mw@dermichi.com>
To: linux-xfs@oss.sgi.com
Subject: Re: XFS and DPX files
Date: Mon, 14 Dec 2009 18:49:51 +0100	[thread overview]
Message-ID: <4B267ABF.6090706@dermichi.com> (raw)
In-Reply-To: <hg5oeo$bh2$1@osprey.mgras.de>

Hi!
> 
> I've been under the impression that "modern disks" (TM), at minimum the
> server-type products, are supposed to re-use the remaining spin-energy
> for generating the required power and thus writing the content of their
> on-disk write cache to the disks.
> 
Nope, they don't. All disks do is use the remaining spin energy to
mechanically park the disk heads. Server-grade disks should always ship with
their drive write cache turned off per default.
The only thing possible imho would be a small ssd on disk for the cache, but
no disk manufacturer does this either.

cya,
  Michael

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  reply	other threads:[~2009-12-14 17:49 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-10-31 12:26 XFS and DPX files AndrewL733
2009-10-31 14:18 ` Emmanuel Florac
2009-10-31 14:37   ` AndrewL733
2009-10-31 16:48     ` Emmanuel Florac
2009-11-02 11:05       ` Michael Monnerie
2009-11-02 17:52         ` Emmanuel Florac
2009-11-02 21:50           ` AndrewL733
2009-11-02 22:26             ` Emmanuel Florac
2009-11-03  3:09             ` Eric Sandeen
2009-11-02 21:58           ` Michael Monnerie
2009-11-03 11:19             ` Emmanuel Florac
2009-11-03 20:58               ` Michael Monnerie
2009-12-14 16:17             ` Martin Spott
2009-12-14 17:49               ` Michael Weissenbacher [this message]
2009-11-02 21:34     ` Eric Sandeen

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