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Mirrored RAID Set Questions

650 Views 7 Replies Latest reply: Mar 19, 2012 3:35 PM by Raymond Fox RSS
Raymond Fox Level 2 Level 2 (255 points)
Currently Being Moderated
Mar 11, 2012 5:31 PM

I initially set up a mirrored RAID set up on my system drive as a means of backing up my files. I've since decided I'd like to use Time Machine instead. When I try and break up the RAID set using Disk Utility, a lock icon appears next to the RAID set and I'm unable to "delete" the set.  My guess is that I need to reboot off a different system, but since Lion didn't come with an install disc, and since Lion doesn't set up a Recovery HD on RAID sets, how would I go about unlinking this mirrored RAID set?


Conversely, I inadvertantly unlinked a different RAID set and would like to reconnect them, but Disk Utility says it'll erase all the data on the drives before it establishes the connection.  Is there a way to reconnect a mirrored RAID set that has been disconnected?

Mac OS X (10.7.3), 12GB RAM
  • Frank Caggiano Level 7 Level 7 (22,815 points)
    Currently Being Moderated
    Mar 11, 2012 6:12 PM (in response to Raymond Fox)

    For the first question, go back to the App Store download Lion again but before it begins the install stop the process and create a flash drive installer. See How to make a bootable Lion install disc or drive .


    Remember you have to make sure the install process doesn;t proceed because once Lion is installed the installer app will be removed from your HD.


    Sorry can;t help with the second question.



  • Frank Caggiano Level 7 Level 7 (22,815 points)
    Currently Being Moderated
    Mar 14, 2012 8:39 AM (in response to Raymond Fox)

    Are you saying if you go to the App Store and download Lion it won't do it?


    I'm not sure I understand what you mean when you say:

    I didn't install a backup drive during the Lion install because the installer simply wouldn't do it on a RAID set

    You're not installing anything with the procedure I linked to, you're creating a bootable flash drive with Lion on it.


    Perhaps if you described fully how you did get Lion installed originally it might help to clear this up.



  • Frank Caggiano Level 7 Level 7 (22,815 points)
    Currently Being Moderated
    Mar 14, 2012 11:31 AM (in response to Raymond Fox)

    Yes that was what I was suggesting, sorry if ti wasn't clear.


    If you can get the Lion installer app to download you should then be able to make the flash drive as described in the link in mt first post. Once you have that you can boot from it and should be able to do what you need to do to the RAID set drives.


    good luck, let us know how it works 'm sure others will run into this.




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