How
to check if the mirroring has an issue? How to check the health of
an LV which has mirror?
In
case there are issues with the mirroring you can see the Stale PEs on
the LV.
To see
this you can use
lvdisplay
-v <LV_Name> | grep -i stale
If
mirror copies in lvdisplay is 1 and there are no stale extents you
are good, your 1 way mirror is healthy.
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