Best Array Controller

Posted on 2012-08-13
Last Modified: 2012-08-14
Looking for input. What is the best array controller to use for a small RAID5 array?
Question by:DuganproIT
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    Expert Comment


    Author Comment

    What would you suggest as a size consideration for RAID 5? And if the decision is made to go with RAID 5, which array controller would you recommend?
    LVL 30

    Assisted Solution

    What's the app?

    SATA ?
    Need cache?
    Battery backup?
    Price range?
    LVL 26

    Accepted Solution

    The minimum size array for RAID 5 in my opinion is at least 13GB.

    Controllers designed only for SATA drives limit scalability to the number of drives that can be directly attached and limit performance to SATA speeds. Unified Serial® (SATA/SAS) controllers, including Adaptec RAID controllers, connect to both SATA and SAS disks, increasing your flexibility in building a system by supporting scalability up to 256 SATA/SAS devices.
    LVL 55

    Expert Comment

    >Don't use RAID 5 on small arrays.

    Same old drum banging on about consumer grade disks with Nonrecoverable Read Errors per Bits Read of 1 in 10^14, but enterprise disks have 10 times less errors. And the same applies to RAID 1 and 10 anyway, there's always a chance of an URE during a rebuild, that's why you make backups.

    I have same questions as pgm554, plus is there a specific server being used?
    LVL 55

    Expert Comment

    Ludicrous. Although I echo pgm554's comment it cannot be an answer since it is a list of questions. Accepted answer isjust wrong, max devices in a SAS domain is 16,384 although that incluses the initiators and expanders and I doubt you'll find a card claiming it can achieve that.

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