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Deleting backing Snapshot copies of deleted LUN clones

Prior to Data ONTAP 7.3, the system automatically locked all backing Snapshot copies when Snapshot copies of LUN clones were taken. Starting with Data ONTAP 7.3, you can enable the system to only lock backing Snapshot copies for the active LUN clone. If you do this, when you delete the active LUN clone, you can delete the base Snapshot copy without having to first delete all of the more recent backing Snapshot copies.

About this task

This behavior in not enabled by default; you can use the snapshot_clone_dependency volume option to enable it. If this option is set to off, you might still be required to delete all subsequent Snapshot copies before deleting the base Snapshot copy.

If you enable this option, you are not required to rediscover the LUNs. If you perform a subsequent volume snap restore operation, the system restores whichever value was present at the time the Snapshot copy was taken.

Step

  1. Enable this behavior by entering the following command: vol options volume_name snapshot_clone_dependency on