Use the command line tool diskutil to verify and/or repair permissions on a software RAID volume. Note: The user running these commands must have administrative privileges.
- Open Terminal.
- Execute the following command to find the current disk number for the RAID set:
diskutil checkRAID
The output should look like this:
AppleRAID sets (1 found) ===================================================================== Name: Untitled RAID Set 1 Unique ID: A7F6D953-229B-42AF-AEC2-90343622FF12 Type: Mirror Status: Online Size: 319.7 GB (319728943104 Bytes) Rebuild: manual Device Node: disk2
--------------------------------------------------------------------- # DevNode UUID Status Size --------------------------------------------------------------------- 0 disk1s2 18ADC3BD-484C-4037-9CD2-9912E0239EAC Online 319728943104 1 disk0s2 2016FF0B-D188-448D-9B22-0F34C58EB8AB Online 319728943104 =====================================================================
In the above example, the disk number associated with the RAID set is "disk2". -
Run the following command to verify the permissions on the volume:
diskutil verifyPermissions disk2
-
To repair permissions on the volume, this command can be used instead:
diskutil repairPermissions disk2
Learn more
Other useful information about the diskutil command can be found by executing this command in Terminal:
man diskutil