Raid 5?

Discussion in 'Mac OS X Server, Xserve, and Networking' started by nownot, Aug 26, 2009.

  1. nownot macrumors regular

    Joined:
    Feb 25, 2007
    Location:
    tx
    #1
    Does (or will) Leopard or Snow Leopard server have the ability to do software raid 5? So if I install either on my mac pro and fill sata ports w/ 1 tb hd's will I be able to create a software raid 5, thanks for any input.
     
  2. belvdr macrumors 603

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    Aug 15, 2005
  3. uberamd macrumors 68030

    uberamd

    Joined:
    May 26, 2009
    Location:
    Minnesota
    #3
    I've never liked software raid to be honest. As I type this my XServe RAID is creating a 2TB hardware RAID 5 array :)
     
  4. belvdr macrumors 603

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    Aug 15, 2005
    #4
    Me either.

    That's it?
     
  5. nownot thread starter macrumors regular

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    #5
    correct me if I'm wrong but with raid 10 you loose the space of half of the hd's where as with raid 5 you loose 1 ...... right?
     
  6. belvdr macrumors 603

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    Aug 15, 2005
    #6
    Correct, but where RAID 5 lacks in writing, RAID 10 shines. Additionally RAID 10 has much less overhead than RAID 5, as no parity needs to be calculated.
     
  7. nownot thread starter macrumors regular

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    Feb 25, 2007
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    tx
    #7
    true but
    6 x 1.5 tb raid 5 = 7.5 tb :D
    6 x 1.5 tb raid 10 = 4.5 tb :mad:

    kinda hurts :p
     
  8. belvdr macrumors 603

    Joined:
    Aug 15, 2005
    #8
    true but
    6 x 1.5 tb slow raid 5 = 7.5 tb :mad:
    6 x 1.5 tb fast raid 10 = 4.5 tb :D

    :) Seriously though, on a software RAID, RAID 5 tends to chew up some CPU, whereas RAID 10 does not. It's all in what you need, but if you need RAID 5, you'll need a hardware array controller.
     
  9. snakesqzns macrumors regular

    snakesqzns

    Joined:
    Apr 26, 2007
    #9
    Is ZFS an option? If so that'd be better than RAID 5 (on paper, I don't know the status of the mac ZFS implementation)
     

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