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Thread: Cluster sizes in RAID0+1.

  1. #1

    Default Cluster sizes in RAID0+1.

    I first installed the RAID drivers, obviously, and then when installing Windows, I made a 60GB partition to boot from. Windows installation automatically formats this drive to have 4kb clusters. I also made the other 410GB another partition, which was left unformatted.

    Once windows was loaded, I formated the 410GB partition (E) with 64kb clusters by running "format e: /FS:NTFS /A:64KB" in a command prompt.

    As you'll notice, as file size gets larger, the 64kb cluster drive starts to pull away... this cannot be attributed to the position of the partitions on the drives, since the C drive is actually on the outermost portions of the disk. At any rate, here are the results:

    C (4kb clusters): http://s42.yousendit.com/d.aspx?id=0...I3NAK1DP0JN36K
    E (64kb clusters): http://s48.yousendit.com/d.aspx?id=1...23R79LSA4SIVNX

    It would've been really nice to get a 5th drive so that I wouldn't have had to partition the array, but it's working pretty nicely.

    More on cluster sizes here:

    If you are going to store multimedia stuff that is usually huge in size, make cluster bigger to increase a performance.

    http://www.ntfs.com/ntfs_optimization.htm

    The choice of cluster size has an impact on real-world performance, though for most people it is not all that significant. In a nutshell, larger clusters waste more space due to slack but generally provide for slightly better performance because there will be less fragmentation and more of the file will be in consecutive blocks.

    http://www.storagereview.com/guide20...leCluster.html

  2. #2

    Default

    Due to the very random performance of that setup, I tried multiple times to get it to work properly and be more stable, but it never did. Currently running RAID1 w/ 2 drives on NVRAID and RAID0 w/ 2 drives on the integrated Silicon Image controller.

    The NVRAID1 looks to be the culprit for ruining the 0+1, since my current RAID1 is performing just as good as the 0+1 I posted pictures of.

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