Align a GPT partition

Discussion in 'Windows Server' started by Guillermo G. Lovato, Feb 27, 2009.

  1. Hello,
    i need to partition a 5.8TB RAID5 array in one piece in Win2003R2.
    i've followed diskpart info from ms support site but it never covers GPT
    partition and i can't use MBR as it tops @2TB.

    So i have a blank GPT drive with NO partitions, i run:
    wmic partition get BlockSize, StartingOffset, Name, Index
    BlockSize Index Name StartingOffset
    512 0 Disk #0, Partition #0 16384
    512 0 Disk #1, Partition #0 17408

    Then i do a list partition in diskpart
    DISKPART> list partition

    Partition ### Type Size Offset
    ------------- ---------------- ------- -------
    Partition 1 Dynamic Reserved 1024 KB 17 KB
    Partition 2 Reserved 127 MB 1041 KB

    The stripe size is 64KB, but i have those 2 hidden space-eating partitions
    at the beginning of the drive and i can't align them correctly, i've tried
    align=1024, 64, 128 and the results are awful.
    do i use 2048?, or the offset align is relative to the last partition end?

    how do i align this?

    thanks in advance
    Guillermo G. Lovato, Feb 27, 2009
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  2. Guillermo,

    Depending on your hardware, you can configure and align partition at the
    startup console. Look through the console when the server is booting and
    look for the right key to hit that will take you to configuration etc.

    Isaac Oben -MCSE, MCITP, Feb 28, 2009
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  3. What configuration?, you mean the RAID controller BIOS?, if so, it has
    nothing to do with the alignment process, only with raid volume creation,
    what i need to know if what offset do i use with diskpart to align a GPT
    Guillermo G. Lovato, Mar 2, 2009
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