From: Phillip Susi <psusi@cfl.rr.com>
To: LVM general discussion and development <linux-lvm@redhat.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Subject: Re: [linux-lvm] getting pe_start right
Date: Tue, 10 May 2011 10:28:18 -0400 [thread overview]
Message-ID: <4DC94B82.1090408@cfl.rr.com> (raw)
In-Reply-To: <20110506152129.GA25531@redhat.com>
On 5/6/2011 11:21 AM, Mike Snitzer wrote:
> chances are lvm2's data_alignment_detection will shift the data start to
> the start of the next full stripe of the raid5.
That appears to be what was going on. I found entries in lvm.conf to
enable/disable autodetection of the raid stripe width and turned it off.
> You should be able to specify the old start with:
>
> --dataalignment 192k --dataalignmentoffset 0
>
> (--dataalignmentoffset 0 likely isn't needed, but it just overrides
> lvm2's data_alignment_offset detection if it just so happens that
> raid5 has alignment_offset!=0)
The command line switches did not appear to override the autodetection;
I had to shut it off in the conf file. Is this a bug?
prev parent reply other threads:[~2011-05-10 14:28 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-06 14:55 [linux-lvm] getting pe_start right Phillip Susi
2011-05-06 15:05 ` CHANDRASEKARAN, GIRIDHAR (GIRI) (ATTSI)
2011-05-06 15:16 ` Milan Broz
2011-05-06 15:21 ` Mike Snitzer
2011-05-10 14:28 ` Phillip Susi [this message]
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