Under 10.8.4 with a 2012 Mac Pro, I can not setup a mirror RAID using the Apple Disc Utility and Seagate 3TB Drives. There is no problem using 2TB Drives for the mirror RAID but when the 3TB Drives are installed the disc utility does not have a RAID option however the drives have mounted and formatted. The partition option is also strange in that only one or two partitions are permitted. Discussions with Apple suggested not using 3TB Dries for RAID appliations. Has anyone encountered a similar probem?
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Apple Disc Utility Problem with 3 TB Drives
- Thread starter fotophil
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See my post #7 in this thread. There is a bug in Disk Util with 10.8.4 when trying to format larger than 2TB internal drives. You will need to temporarily put the drive in an external enclosure to format larger than 2TB.