Disk Utility for Mac: Unmount a disk set or disk member using Disk Utility

Unmount a disk set or disk member using Disk Utility

You may need to unmount a disk set or a member disk to repair it or perform other maintenance.

Unmount a disk set

  1. In Disk Utility, select the disk set that you want to unmount in the sidebar.

  2. Click the Unmount button in the toolbar or beside the disk set name.

After unmounting a disk set, you can disconnect the disk members of the set from your computer.

Unmount a disk member of a set

  1. In Disk Utility, select the disk set that you want to unmount in the sidebar.

  2. Click the Unmount button in the toolbar or beside the disk set name.

  3. Disconnect the disk member that you want to unmount.

If you unmount and disconnect a disk, and then reconnect the disk later, Disk Utility rebuilds the disk member automatically if you selected “Automatically rebuild” when creating the disk set. If you need to rebuild the disk manually, see Repair a disk in a mirrored disk set.

Published Date: Apr 2, 2017
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