[linux-lvm] Data alignment

Phillip Susi psusi at ubuntu.com
Tue Feb 12 14:58:56 UTC 2013


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I have been getting warnings from mke2fs lately that my logical
volumes are not aligned properly.  I am using a raid5 array as a pv
and it has a 1.5 MB stripe width, so logical volumes should be aligned
to that, but it appears lvm is not doing this.

It looks like you can specify this alignment at pvcreate time, but I
don't think I did and it doesn't seem to have been picked up
automatically.  Is there a way to change this without rebuilding the vg?

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