Issues in reverting to Data ONTAP 7.3 if you have SnapLock volumes

SnapLock is disabled in the first release of Data ONTAP 7.3. Therefore, if you revert from a later release in the Data ONTAP 7.3 release family, any SnapLock Compliance or SnapLock Enterprises license that has been installed on the later release will either be disabled or your storage system will halt.

If your storage system contains SnapLock Compliance or Enterprise volumes, or aggregates and you attempt to revert to Data ONTAP 7.3, the system halts. The SnapLock disks that cause the system to halt are listed on the console. Following is an example of such a message on the console:

SnapLock disk : 0d.40 Use fcadmin device_map for shelf and slot info  SnapLock disk : 0d.43 Use fcadmin device_map for shelf and slot info  SnapLock disk : 0d.42 Use fcadmin device_map for shelf and slot info   This release does not support SnapLock.  Halting the system !!!  To recover - boot with a release that supports SnapLock or unplug the SnapLock disks.

If you revert to Data ONTAP 7.3 with an installed SnapLock Compliance or Enterprise license without any SnapLock Compliance or Enterprise volumes or aggregates on the system, the system does not halt, but the SnapLock license is disabled. In such a scenario, the license is displayed if you use the license command. However, all operations that require a SnapLock license fail. Therefore, you cannot create a new SnapLock volumes on Data ONTAP 7.3. The error message snaplock.unsupported.version is generated when you boot the storage system.

If you connect disks that were part of a SnapLock Compliance or Enterprise aggregate into a system running Data ONTAP 7.3, the system halts and displays the following message on the console:

SnapLock disk : 0d.40, Shelf : 2, Slot : 8
 SnapLock disk : 0d.43, Shelf : 2, Slot :11
 SnapLock disk : 0d.42, Shelf : 2, Slot: 10
 This release does not support SnapLock.
 Halting the system !!!
 To recover - boot with a release that supports SnapLock or unplug the SnapLock disks

Starting in Data ONTAP 7.3.1, SnapLock is supported. Therefore, if you are upgrading to Data ONTAP 7.3.1 or a later release in the 7.3 release family, the system will not halt and you can install the SnapLock Compliance or SnapLock Enterprise license.

Recovering from the halt caused by SnapLock
If the storage system halts because you have SnapLock volumes on the system and you attempted to revert to Data ONTAP 7.3, you can recover from the halt by using a release that supports SnapLock or by disconnecting disks that have SnapLock installed.

Parent topic: What SnapLock is