

You'll want to replace *start* and *size* with the output from 'gpt show disk1'. This removed the partition data, not the volume contents. I copied the output to textedit then ran removed the partition manually with this: Then I ran 'gpt show disk1' to list the partition data for '/dev/disk1'. The GUID-looking number in the contents refers to the type of partition, in my case "Apple_RAID_Offline" (source: ) In my case it was '/dev/disk1' with an identifier of 'disk1s2' and an index of '2' and contents as 'GPT part - 52414944-5F4F-11AA-AA11-00306543ECAC'. In short, I ran 'diskutil list' from terminal and located a partition labeled "Apple_RAID_Offline". I searched for weeks, and finally found the answer here: The volume was greyed-out in the Disk Utility GUI, and Drive Genius wouldn't touch it. No matter what I tried I couldn't get it to mount. When I saw the rebuild time was well over 3 days, I broke the mirror, thinking I would be able (as the message box indicated) use each drive separately.Īs it turns out, the enclosure died, and after I broke the mirror, neither volume would mount. I tried to rebuild the set, thinking it was just a logic error. The array was listed as degraded in Disk Utility. I was running a 2 x 2TB, RAID 1 on a FW800 enclosure, with over 600GB free. Recovering a RAID Drive that won't mount: FIXED!
