From: Mike Snitzer <snitzer@redhat.com>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] Advanced Format disks mixed with regular disks?
Date: Mon, 14 Mar 2011 14:02:50 -0400 [thread overview]
Message-ID: <20110314180250.GA18622@redhat.com> (raw)
In-Reply-To: <4D7E5144.7060200@gmail.com>
On Mon, Mar 14 2011 at 1:32pm -0400,
Les Mikesell <lesmikesell@gmail.com> wrote:
> On 3/14/2011 12:17 PM, Mike Snitzer wrote:
> >
> >>Is there any concern with mixing 4KB-sector drives with 512-byte
> >>sector drives in the same LV?
> >
> >Both LVM2 and Device Mapper have been updated to accommodate stacking
> >such a mix of drives.
> >
> >See this for a bit more detail:
> >http://people.redhat.com/msnitzer/docs/io-limits.txt
> >
> >Particularly, the "Stacking I/O Limits" section.
> >
> >The concern raised for partial (4k) writes to the 512b drive was
> >discussed a bit more here: http://lkml.org/lkml/2010/2/22/295
>
> Are there any version-level hints about when/where these changes
> appear and come together in the real world (i.e. distributions like
> RHEL, debian, Ubuntu)?
For the kernel, the bulk of associated infrastructure (ata, scsi, block,
dm, md, etc) went in 2.6.31, 2.6.32 saw some improvements, and 2.6.33
and 2.6.34 saw a few bug fixes.
v2.6.32.11 saw a backport of the 2.6.33 and 2.6.34 bug fixes via commit
9b2ff97
RHEL6 has all this. I cannot speak for debian and/or Ubuntu.
As for LVM2, you'd want >= 2.02.62.
Mike
next prev parent reply other threads:[~2011-03-14 18:02 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-14 16:47 [linux-lvm] Advanced Format disks mixed with regular disks? Ron Johnson
2011-03-14 17:17 ` Mike Snitzer
2011-03-14 17:32 ` Les Mikesell
2011-03-14 18:02 ` Mike Snitzer [this message]
2011-03-14 18:09 ` Ron Johnson
2011-03-14 19:13 ` Ron Johnson
2011-03-14 20:00 ` Mike Snitzer
2011-03-15 8:02 ` Karel Zak
2011-03-15 14:24 ` Stuart D. Gathman
2011-03-15 17:36 ` Stuart D. Gathman
2011-03-15 0:15 ` John Drescher
2011-03-16 20:45 ` Phillip Susi
2011-03-16 22:55 ` Mike Snitzer
2011-03-16 23:11 ` Les Mikesell
2011-03-17 0:02 ` Mike Snitzer
2011-03-17 0:18 ` Mike Snitzer
2011-03-17 0:12 ` Phillip Susi
2011-03-17 0:39 ` Martin K. Petersen
2011-03-17 14:21 ` hansbkk
2011-03-17 23:47 ` Ron Johnson
2011-03-22 10:23 ` Karel Zak
2011-03-22 16:51 ` Les Mikesell
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