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Is it possible to modify the volume from writeable to readonly?

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Category:
ontap-9
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core
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Applies to

ONTAP 9

Answer

It's not possible to modify the volume from writeable(RW) to readonly(DP) directly. 
 
There are two ways to make the volume into a DP volume:
 
  • Create a volume with DP type:

::> volume create -volume volname -vserver svm1 -type DP

  • Resync a SnapMirror relationship, the destination volume becomes DP type.
Snapmirror resync operation can delete data in the destination volume, make sure the resync volume is correct or not.

::> snapmirror show
                                                                       Progress
Source            Destination Mirror  Relationship   Total             Last
Path        Type  Path        State   Status         Progress  Healthy Updated
----------- ---- ------------ ------- -------------- --------- ------- --------
svm1:vol1  XDP  svm1:vol1dp  Snapmirrored
                                      Idle           -         true    -
 

::> volume show -volume vol1dp
Vserver   Volume       Aggregate    State      Type       Size  Available Used%
--------- ------------ ------------ ---------- ---- ---------- ---------- -----
svm1      vol1dp       aggrfp       online     DP        500MB    195.9MB   60%
 

::> snapmirror break -destination-path svm1:vol1dp
Operation succeeded: snapmirror break for destination "svm1:vol1dp".
 

::> volume show -volume vol1dp
Vserver   Volume       Aggregate    State      Type       Size  Available Used%
--------- ------------ ------------ ---------- ---- ---------- ---------- -----
svm1      vol1dp       aggrfp       online     RW        500MB    194.8MB   61%
 

::> snapmirror resync -destination-path svm1:vol1dp

Warning: All data newer than Snapshot copy snapmirror.xxxxxx.xxxx-xx-xx_xxx on volume svm1:vol1dp will be deleted.
Do you want to continue? {y|n}: y
Operation is queued: initiate snapmirror resync to destination "svm1:vol1dp".

corecls9701::> volume show -volume vol1dp
Vserver   Volume       Aggregate    State      Type       Size  Available Used%
--------- ------------ ------------ ---------- ---- ---------- ---------- -----
svm1      vol1dp       aggrfp       online     DP        500MB    195.9MB   60%

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