[linux-lvm] Filesystem corruption with LVM's pvmove onto a PV with a larger physical block size
Stuart D. Gathman
stuart at gathman.org
Tue Mar 5 00:12:24 UTC 2019
On Mon, 4 Mar 2019, Cesare Leonardi wrote:
> Today I repeated all the tests and indeed in one case the mount failed: after
> pvmoving from the 512/4096 disk to the 4096/4096 disk, with the LV ext4 using
> 1024 block size.
> The error happened where you guys expected. And also for me fsck showed no
> But doesn't look like a filesystem corruption: if you pvmove back the data,
> it will become readable again:
THAT is a crucial observation. It's not an LVM bug, but the filesystem
trying to read 1024 bytes on a 4096 device. I suspect it could also
happen with an unaligned filesystem on a 4096 device.
Stuart D. Gathman <stuart at gathman.org>
"Confutatis maledictis, flamis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.
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