OS X Software RAID (Mirroring), please help.

Discussion in 'macOS' started by kman79, Dec 11, 2007.

  1. kman79 macrumors regular

    Joined:
    Jul 17, 2007
    #1
    I have a dual enclosure by OWC that is RAID (Mirrored) by using OS X raid configuration, but I do have a concern in terms of reliability and redundancy. Since this RAID is software controlled, what would happen to the data on it if I was to reformat and reinstall OS X on my MacBook Pro? Would the RAID configuration in my enclosure stay intact? Will I be able to read the information stored in the previous OS X RAID?

    I apologize for my ignorance with this issue, any help is greatly appreciated.
     
  2. VideoFreek macrumors 6502

    VideoFreek

    Joined:
    May 12, 2007
    Location:
    Philly
    #2
    If I understand you correctly, you are using a 2-disk array configured as RAID 1 (mirrored drives). If this is correct, no worries, since the full data are written to each drive. More info here. Be aware that software RAID takes a performance toll, however. You'd be better off using an enclosure with a built-in hardware RAID controller.
     
  3. kman79 thread starter macrumors regular

    Joined:
    Jul 17, 2007
    #3
    I really do want an Enclosure that will do Hardware RAID1, but the OWC Elite enclosure I bought won't do RAID1 via hardware, didn't see that in the fine print.

    I appreciate the help and the link. So it seems in the even I do a reformat and clean install of OS X, my RAID1 should still work with the newly installed OS X. Thank you sir.
     
  4. ChrisA macrumors G4

    Joined:
    Jan 5, 2006
    Location:
    Redondo Beach, California
    #4
    You can always replace the enclosure. It's the two drives that are the expensive part. With software RAID 1 (mirror) there is a performance hit for writes because the data has to go down the cable twice. But for reads it can actually be faster than a single drive. The software and "ping pong" between the drives and take advantage of some parallelism.
     

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