Switching off hole drilling on mount path [ ] as it is not supported

Article ID: DD0050 Micro pruning (individual data blocks) is not supported by the mount path file system

Symptom

The following error message is displayed in the SIDBPrune.log located in the /Log Files folder.

### FinalizeSFile:1885 Switching off hole drilling on mount path [ ] as it is not supported

Cause

There are some file systems that do not support space reclamation of a deleted data blocks (drilling holes) that are not at the end of the file. This usually relates to the support of sparse files. This lack of sparse file support results in the errors that appears in the SIDBPrune log file.

When a unique block of data are eligible for deletion, the failed attempt to delete the data is recorded in the SIDBPrune log. This continues until the unique block of data is deleted. If the block of data to prune is at the end of the file, then that file will be truncated to remove the eligible data from the disk.

Resolution

In situations where sparse files are not supported and you want to disable drilling of holes during pruning of deduplicated data, you can use the additional settings listed below.

Regardless of these settings the software tracks the data to be deleted and if the block of data to prune is at the end of the file, then that file will be truncated to remove eligible data from the disk.

These additional settings must be configured on the MediaAgent hosting the DDB and all other MediaAgents that are used as Data Movers for the mount paths or data paths involved.

For Version 10 and higher use DedupDrillHoles additional settings:

  1. From the CommCell Browser, expand Storage Resources | MediaAgents.
  2. Right-click the appropriate MediaAgent, and then click Properties.
  3. In the MediaAgent Properties dialog box, click the Additional Settings tab, and then click Add.
  4. In the Add Additional Settings dialog box, in the Name box, type DedupDrillHoles.
    The CategoryType and Description details fill automatically.
  5. In the Value box, type 0.
  6. Click OK and then click OK to close the MediaAgent Properties dialog box.


For Version 9 use SIDBDrillHoles registry key:

  1. From the CommCell Browser, expand Storage Resources | MediaAgents.
  2. Right-click the appropriate MediaAgent, and then click Properties.
  3. In the MediaAgent Properties dialog box, click the Registry Key Settings tab, and then click Add.
  4. In the Add Registry Key dialog box, enter the appropriate options:
    1. In the Name box, type SIDBDrillHoles.
    2. From the Location list, select MediaAgent.
    3. From the Type list, select REG_DWORD.
    4. In the Value box, type 0.
  5. Click OK and then click OK to close the MediaAgent Properties dialog box.