Symptoms

How to remove a Data Domain mtree for a decommissioned VBA?The user has decommissioned VBA in the environment following the steps in the knowledge base article: VBA: How to Delete a VBA Node?.The Data Domain System Manager (DDSM) still shows that the VBA mtree after the decommission steps are completed When selecting the mtree in the "Data Management > mtree" tab and using the delete option, the following message is generated:Delete MTree(s) Status Figure 1: MTree "/domain/col/avamar-##########" contains ddboost storage unit, cannot be deleted.

Cause

The NetWorker VBA device creates the Data Domain MTree with a DD Boost device configuration.

Resolution

1. Open an SSH session to the Data Domain and log in as sysadmin.2. Return a list of the configured storage units with the following command: ddboost storage-unit show 3. Using the VBA's storage-unit name, delete it with the following command: ddboost stoage-unit delete VBA_STORAGE_UNIT NOTE: If you run `ddboost storage-unit show` again the storage-unit status shows D (deleted). The storage-unit and mtree will be deleted after a Data Domain file system clean.

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