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raid settings

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  • raid settings

    hi all

    i have kind of hardware question
    i intend to install sbs 2008
    can i configure on one raid card
    2 types of raid
    one miror for the system
    and raid 5 for exchange?


  • #2
    Re: raid settings

    That really depends on your RAID Controller, although any decent controller will allow this setup.

    I just installed SBS 2008 on an HP ML110, which has onboard SATA RAID supporting RAID 0,1 and 10, but not 5. Not a combination I've ever seen before.
    BSc, MCSA: Server 2008, MCSE, MCSA: Messaging, MCTS
    Cruachan's Blog


    • #3
      Re: raid settings

      Why are you wanting to install the Exchange files on a RAID5 configuration? Why not just go with RAID1 on both the System files and Exchange files? RAID1 provides better read/write speed than a RAID5 would as RAID5 is processor intensive yet you're getting the same fault tolerance with both RAID setups.

      Basically, here's what you get with the following RAID setups:

      Raid 0 = 2TB (capacity = total of all drives, minimum 2)
      Raid 1 = 2x 500GB (2:1 ratio, minimum 2 per set)
      Raid 10 = 1TB (2:1 ratio, minimum 4)
      Raid 5 = 1.5TB (capacity = total of all drives minus 1, minimum 3)

      Redundancy (NOT BACK UP)
      Raid 0 = NONE
      Raid 1 = Single Drive Failure per mirrored set
      Raid 10 = Single Drive Failure per mirrored set
      Raid 5 = Single Drive Failure

      Raid 0 = Fastest, performance increases with drive count
      Raid 1 = Possible boost in speed for READ, no gain to possible loss (if noticeable) elsewhere
      Raid 10 = Similar performance to its equivalent drive Raid 0 (ie 3 Drive Raid0=6 drive Raid 10)
      Raid 5 = Between Raid 0 and single drive performance, goes up with drive count, and is processor intensive

      I'd go with RAID1 for both file systems. It may be cheaper too!


      • #4
        Re: raid settings

        It all depends on the make and model of your RAID controller. Some will allow you to setup different RAID sets.

        I would suggest you go to the RAID controllers vendors website to check, most high end controllers can support this, on-board RAID normally do not.