Assemble: allow arrays to be assembled read-only.

The option was there, but never used.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 7 insertions, 0 deletions

diff --git a/mdadm.8.in b/mdadm.8.in
index 1a7cba7e..33919bd2 100644
--- a/mdadm.8.in
+++ b/mdadm.8.in
@@ -832,6 +832,13 @@ initial resync work faster).  With
 will not try to be so clever.
 
 .TP
+.BR \-o ", " \-\-readonly
+Start the array
+.B read only
+rather than read-write as normal.  No writes will be allowed to the
+array, and no resync, recovery, or reshape will be started.
+
+.TP
 .BR \-a ", " "\-\-auto{=yes,md,mdp,part,p}{NN}"
 Instruct mdadm how to create the device file if needed, possibly allocating
 an unused minor number.  "md" causes a non-partitionable array