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See HDD failed in Mirrored RAID Set

Could you please kindly tell what steps should I do to fix failed Harddisk as below? Many Thanks.


User uploaded file

Mac Pro, Mac OS X (10.6.8)

Posted on Aug 13, 2012 2:50 AM

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Posted on Aug 13, 2012 10:36 PM

Sure - remove disk2 and discard it.


Replace it with a new 2TB drive.


Rebuild your mirror (via Disk Utility)

3 replies

Jan 25, 2013 7:10 AM in response to Camelot

Thanks for the answer. Do you have any pointers to how to identify from device name, which physical hard disk it is? For example, I have a RAID1 mirror set, the devices are disk1s3 (failed) and disk4s2. These are partitions on 2 different external disks. How do I know which one disk1s3 is? Is there a way to reconcile it with the hardware?


I suppose I could unplug one of the disks and see what happens, but that would be disruptive and extreme. What would happen to the RAID set, what if Time Machine is running to the mirror?

See HDD failed in Mirrored RAID Set

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