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Disk Utility's RAID feature doesn't seem to work
Authored by: pdm on Oct 19, '09 08:34:20AM
> However, booting off of a Software RAID is not supported. From your post, it seems that this is what you are trying to do by mirroring your internal hard drive.

This isn't true. In my Mac Pro I am using software RAID 1+0 and boot from this with no problems at all.


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Disk Utility's RAID feature doesn't seem to work
Authored by: gylgamesh5 on Oct 20, '09 09:36:04AM
Incorrect. RAID booting is supported on some Macs (your Mac), but not all Macs.

Intel-based Macs: Flashing question mark when trying to boot from RAID volume
  • Last Modified: November 09, 2006
  • Article: TA24104
  • Old Article: 303692
Products Affected

Mac mini (Mid 2007), Mac mini (Late 2006), Mac mini (Early 2006), iMac (20-inch, Mid 2007), iMac (24-inch Mid 2007), iMac (Mid 2006 17-inch), iMac (Early 2006 20-inch), iMac (Early 2006 17-inch), iMac (24-inch, Late 2006), MacBook Pro, Mac mini, iMac (20-inch Late 2006), iMac (17-inch, Late 2006 CD), iMac (17-inch, Late 2006), iMac (24-inch, Early 2008), iMac (20-inch, Early 2008)

Some Intel-based Macs do not support booting from software RAID volumes. If you try to start these Intel-based Macs up from a software RAID volume, the computer may start up to a flashing question mark.

The following computers do not support booting from software RAID volumes:

  • MacBook
  • MacBook Pro (not including MacBook Pro (Core 2 Duo) models)
  • iMac (Early 2006)
  • Mac mini (Early 2006)

This document will be updated as more information becomes available.

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Disk Utility's RAID feature doesn't seem to work
Authored by: babbage on Oct 20, '09 11:59:16AM

Oddly enough, the list of unsupported computers happens to be identical to the list of computers that don't include a spare SATA bay to install a second drive to create a RAID set with.

You could remove the optical drive, sure, but that's exactly the sort of thing that Apple isn't likely to condone within the context of a valid warranty.

As far as I can tell, software RAID works just fine on any Mac that has room for at least a pair of SATA drives. My G5 tower at home has been running from a mirrored pair of 1.5TB drives for months now without a problem.



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