Commit 66bb2644 authored by Mike Snitzer's avatar Mike Snitzer

dm cache: document metadata device is exclussive to a cache

A cache's metadata device may not be shared by multiple cache devices.
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
Acked-by: default avatarJoe Thornber <ejt@redhat.com>
parent 670368a8
...@@ -50,7 +50,8 @@ other parameters detailed later): ...@@ -50,7 +50,8 @@ other parameters detailed later):
which are dirty, and extra hints for use by the policy object. which are dirty, and extra hints for use by the policy object.
This information could be put on the cache device, but having it This information could be put on the cache device, but having it
separate allows the volume manager to configure it differently, separate allows the volume manager to configure it differently,
e.g. as a mirror for extra robustness. e.g. as a mirror for extra robustness. This metadata device may only
be used by a single cache device.
Fixed block size Fixed block size
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