Re: Bad 3ware 9000 performance 5.4?

From: Steven Hartland (killing_at_multiplay.co.uk)
Date: 05/20/05

  • Next message: Vinod Kashyap: "RE: Bad 3ware 9000 performance 5.4?" 
    To: "Martin Nilsson" <martin@gneto.com>, "Alexis Yushin" <alexis@ww.net>
Date: Fri, 20 May 2005 11:05:34 +0100

    Also check out the recent thread on RAID performance on this list for
    additional info on speeding up RAID performance. I was able to increase
    from:
    Read: ~50MB/s
    Write: ~150MB/s
    to:
    Read: ~200MB/s
    Write: ~150MB/s

       Steve / K
    ----- Original Message -----
    From: "Martin Nilsson" <martin@gneto.com>
     
    > I have noticed that the MegaRAID SATA cards sometimes disables the write
    > cache on Seagate SATA drives, resulting in a write performance of about
    > 6MB/s. Can you check if the 3ware also does this. I have had arrays were
    > only one disk had write cache disabled and it totally ruined the
    > performance of the whole array.
    >
    > As always be sure to have a good UPS if you are using write cache on the
    > disks! With the sad state of todays ATA/SATA disks turning of write
    > caching in the drive is often not an option.

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  • Next message: Vinod Kashyap: "RE: Bad 3ware 9000 performance 5.4?"