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From: Phillip Susi <psusi@cfl.rr.com>
To: linux-lvm@redhat.com
Subject: [linux-lvm] Data alignment
Date: Fri, 19 Mar 2010 14:13:18 -0400	[thread overview]
Message-ID: <4BA3BEBE.2010204@cfl.rr.com> (raw)

I have been trying to get my logical volume to be aligned to a 512 KB
boundary on my SSD so it lines up with the flash erase block.  I thought
I could do this with pvcreate --dataalign 1024, but this caused the data
to be aligned to a 1024 sector boundary within the partition, which
itself starts on sector 63.  I then thought the --dataalignoffsest
switch would help, but specifying 63 there caused the data to be moved
to sector 1087.  I tried giving it -63, but was told that a negative
number is not allowed.  Why not?  How can I get the data to start on
sector 1024-63 of the partition so it ends up on pysical sector 1024 of
the disk?

             reply	other threads:[~2010-03-19 18:13 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-03-19 18:13 Phillip Susi [this message]
2010-03-19 18:36 ` [linux-lvm] Data alignment Eugene Vilensky
2010-03-19 18:54   ` Phillip Susi
2010-03-19 19:54     ` Ray Morris
2010-03-19 21:20       ` Phillip Susi
2010-03-20  7:32     ` Luca Berra
2010-03-19 19:25 ` Mike Snitzer
2010-03-19 21:27   ` Phillip Susi
2010-03-19 22:21     ` Mike Snitzer
2010-03-19 23:11       ` Mike Snitzer
2010-03-25 12:54       ` [linux-lvm] Called while suspended Fredrik Skog
2010-03-20 23:02 ` [linux-lvm] Data alignment Stuart D. Gathman
2013-02-12 14:58 Phillip Susi
2013-02-12 15:10 ` Mike Snitzer

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