[linux-lvm] Snapshot LE to PE Mapping
bowmailtmp-lvm at yahoo.com
bowmailtmp-lvm at yahoo.com
Wed Jun 30 21:18:37 UTC 2004
I am using LVM to debug a custom ASIC virtualization
chip for my company. I have found it quite useful.
One queston though, I have written scripts to convert
lvdisplay -vv table output into our own mapping
structures, but found this to be of limited use for
snapshots.
Is there a way to find out where the changed snapshot
data actually resides physically?
if you do lvdisplay for a snapshot volume, it only
gives you the LE->PE maps for the *original* LV. it
does not show you what extents the *changed* data got
moved to, so i don't know how to track it down and
verify it. is there another way to do this or is it a
possible enhancement to lvdisplay for snapshot
volumes?
Thanks,
Dave
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