From: Phillip Susi <psusi@cfl.rr.com>
To: Mark Lord <lkml@rtr.ca>
Cc: Chris Snook <csnook@redhat.com>, Paa Paa <paapaa125@hotmail.com>,
linux-kernel@vger.kernel.org
Subject: Re: Lower HD transfer rate with NCQ enabled?
Date: Tue, 03 Apr 2007 15:17:40 -0400 [thread overview]
Message-ID: <4612A854.1070702@cfl.rr.com> (raw)
In-Reply-To: <4612852C.2030801@rtr.ca>
Mark Lord wrote:
> But WD drives, in particular the Raptor series, have a firmware "feature"
> that disables "drive readahead" whenever NCQ is in use.
Why is this an issue? Shouldn't the kernel be sending down its own
readahead requests to keep the disk busy?
next prev parent reply other threads:[~2007-04-03 19:17 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-03 7:11 Lower HD transfer rate with NCQ enabled? Paa Paa
2007-04-03 9:18 ` Nick Piggin
2007-04-03 21:31 ` Paa Paa
2007-04-04 2:06 ` Nick Piggin
2007-04-06 21:33 ` Bill Davidsen
2007-04-03 16:31 ` Chris Snook
2007-04-03 16:47 ` Mark Lord
2007-04-03 19:17 ` Phillip Susi [this message]
2007-04-04 15:36 ` Mark Lord
2007-04-05 15:30 ` Phillip Susi
2007-04-05 16:11 ` Mark Lord
2007-04-05 16:45 ` Lennart Sorensen
2007-04-09 14:46 ` Phillip Susi
2007-04-10 3:58 ` Mark Lord
-- strict thread matches above, loose matches on Subject: below --
2007-04-05 16:26 Paa Paa
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4612A854.1070702@cfl.rr.com \
--to=psusi@cfl.rr.com \
--cc=csnook@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=lkml@rtr.ca \
--cc=paapaa125@hotmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox