Disk Utility 12.x: Delete a RAID set
You can delete a RAID set if you want to use its disks for another task.
To remove a disk from a striped RAID set or concatenated disk set, you must delete the set first. You can remove disks from a mirrored RAID set without deleting it.
Always back up any important files before you delete the set. Deleting a striped RAID set or concatenated disk set erases all the disks in it. Deleting a version 2.0 mirrored RAID set leaves a copy of the set’s files on each disk, but you should back up any important files as a precaution.
- Back up any important files.
- Open Disk Utility, in the Utilities folder in Launchpad.
- Select a disk in the set that you want to delete, and click RAID.
- Select the RAID set.
- If you’re deleting a mirrored RAID set and you see a Convert button, click it to convert the RAID set from version 1.0 to version 2.0.
Deleting a version 2.0 mirrored RAID set leaves a usable copy of the set’s files on each disk. Deleting a version 1.0 set leaves the disks unreadable.
- Click Delete.