On Sep 5, 2007, at 6:02 AM, Jeff Fisher wrote:
Create a new logical volume of the exact same size, unmount the
original
logical volume, then do:
dd if=/dev/vgsource/lvsource of=/dev/vgdest/lvdest bs=262144
This should be the fastest, and guaranteed to copy all the attributes.
The speed improvement doing it this way can be especially dramatic on
RAID 5 volumes, where writing small files is much slower than writing
large blocks. Minutes instead of hours, in some cases.
Also, the new LV doesn't have to be exactly the same size. The same
size *or larger* will do nicely. There will just be wasted space in
the LV until you expand the filesystem to match, which should be done
after the copy.
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