Skip navigation

See HDD failed in Mirrored RAID Set

643 Views 3 Replies Latest reply: Jan 25, 2013 10:27 AM by Christopher Murphy RSS
pleoel Calculating status...
Currently Being Moderated
Aug 13, 2012 2:50 AM

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



Mac Pro, Mac OS X (10.6.8)
  • Camelot Level 8 Level 8 (45,670 points)
    Currently Being Moderated
    Aug 13, 2012 10:36 PM (in response to pleoel)

    Sure - remove disk2 and discard it.


    Replace it with a new 2TB drive.


    Rebuild your mirror (via Disk Utility)

  • Jay Imerman Level 1 Level 1 (0 points)
    Currently Being Moderated
    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?

  • Christopher Murphy Level 2 Level 2 (470 points)
    Currently Being Moderated
    Jan 25, 2013 10:27 AM (in response to Jay Imerman)

    Terminal command

    diskutil info diskX


    where X is the number of the failed disk. This will get you a device media name. If you use -plist flag you can also get the device tree information. As for serial number for the drive, you'll need to use system_profiler which contains both the bsd name and the serial number for each drive.


More Like This

  • Retrieving data ...

Bookmarked By (0)


  • This solved my question - 10 points
  • This helped me - 5 points
This site contains user submitted content, comments and opinions and is for informational purposes only. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use.