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Commit 424da29c authored by Mikulas Patocka's avatar Mikulas Patocka Committed by Mike Snitzer
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dm snapshot: improve documentation relative to origin suspend requirements 



Add a note to snapshot.txt that the origin target must be suspended when
loading or unloading the snapshot target.

Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent f6e7baad

Documentation/device-mapper/snapshot.txt

+4 −0
Original line number Diff line number Diff line
@@ -49,6 +49,10 @@ The difference between persistent and transient is with transient 
snapshots less metadata must be saved on disk - they can be kept in

memory by the kernel.



When loading or unloading the snapshot target, the corresponding

snapshot-origin or snapshot-merge target must be suspended. A failure to

suspend the origin target could result in data corruption.





* snapshot-merge <origin> <COW device> <persistent> <chunksize>