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How selective disk sanitization works

Selective disk sanitization consists of physically obliterating data in specified files or volumes while preserving all other data located on the affected aggregate for continued user access. Because a file can be stored on multiple disks, there are three parts to the process.

To selectively sanitize data contained in an aggregate, you must carry out three general tasks:
  1. Delete the files, directories or volumes that contain the data you want to sanitize from the aggregate that contains them.
  2. Migrate the data that you want to preserve to a new set of disks in a destination aggregate on the same storage system.

    You can migrate data using the ndmpcopy command or qtree SnapMirror.

  3. Destroy the original aggregate and sanitize all the disks that were RAID group members in that aggregate.