public inbox for linux-scsi@vger.kernel.org
 help / color / mirror / Atom feed
From: Jeff Garzik <jeff@garzik.org>
To: dougg@torque.net
Cc: Bryan Henderson <hbryan@us.ibm.com>,
	Jan Engelhardt <jengelh@linux01.gwdg.de>,
	linux-fsdevel@vger.kernel.org,
	Linux-ide <linux-ide@vger.kernel.org>,
	linux-scsi <linux-scsi@vger.kernel.org>,
	Ric Wheeler <ric@emc.com>
Subject: Re: impact of 4k sector size on the IO & FS stack
Date: Mon, 12 Mar 2007 15:28:18 -0400	[thread overview]
Message-ID: <45F5A9D2.4080406@garzik.org> (raw)
In-Reply-To: <45F5A6F7.9080108@torque.net>

Douglas Gilbert wrote:
> Bryan Henderson wrote:
>> What is an odd-aligned disk?
> 
> s/disk/partition/ ?


Example:  An odd-aligned disk in the 512-b logical / 1K-physical 
scenario is where odd LBAs indicate the start of a 1K physical sector. 
An even-aligned disk is where even LBAs indicate the start of a 1K 
physical sector.

In order to avoid too many RMW cycles, partition software SHOULD (using 
IETF language) be aware of the underlying physical sector size 
alignment, in order to align paritions for optimal performance.

	Jeff



  reply	other threads:[~2007-03-12 19:28 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-03-11 22:51 impact of 4k sector size on the IO & FS stack Ric Wheeler
2007-03-11 23:14 ` Jan Engelhardt
2007-03-12  2:45   ` Ric Wheeler
2007-03-12  3:27     ` Jan Engelhardt
2007-03-12  3:46       ` Andreas Dilger
2007-03-12 12:17       ` Alan Cox
2007-03-12 14:41       ` Jeff Garzik
2007-03-12 14:36   ` Jeff Garzik
2007-03-12 15:45     ` Alan Cox
2007-03-12 18:31     ` Bryan Henderson
2007-03-12 18:37       ` Sergei Shtylyov
2007-03-12 20:52         ` Bryan Henderson
2007-03-12 19:16       ` Douglas Gilbert
2007-03-12 19:28         ` Jeff Garzik [this message]
2007-03-12  0:02 ` Alan Cox
2007-03-12  0:44   ` Jeff Garzik
2007-03-12  2:37     ` Ric Wheeler
2007-03-12 12:24     ` Alan Cox
2007-03-12 13:32       ` Ric Wheeler
2007-03-12 15:21         ` Douglas Gilbert
2007-03-12 16:08           ` Martin K. Petersen
2007-03-12 14:26       ` Jeff Garzik
2007-03-13  5:11         ` Andreas Dilger
2007-03-13  6:34           ` Chris Wedgwood
2007-03-12  2:41   ` Ric Wheeler
2007-03-12  8:18 ` Christoph Hellwig
2007-03-12 14:40   ` James Bottomley
2007-03-12 14:45   ` Jeff Garzik
2007-03-12 14:57     ` Christoph Hellwig

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=45F5A9D2.4080406@garzik.org \
    --to=jeff@garzik.org \
    --cc=dougg@torque.net \
    --cc=hbryan@us.ibm.com \
    --cc=jengelh@linux01.gwdg.de \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-ide@vger.kernel.org \
    --cc=linux-scsi@vger.kernel.org \
    --cc=ric@emc.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