how do i know if my partition are right alignment?

Discussion in 'backup, imaging & disk mgmt' started by mantra, Mar 17, 2011.

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  1. mantra

    mantra Registered Member

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    Hi

    i have paragon Hard Disk Manager Professional & acronis disk director 11

    in the acronis forum i found thanks to Doug
    http://forum.acronis.com/forum/19322

    i did not undestand well maybe someone could help me
    if i have unsterstood
    xp and earlier has 31.5kb at the beginning of the disk and , and between the partitions?
    vista and 7 have 1mb at the beginning of the disk and 1mb between the partitions?
    do i understand right?

    well how can i know if they are right alignment?
    paragon recovery cd doesn't show me , don't know why

    acronis disk director 11 (i guess 10 can't) ,
    let me see the first 1mb but not and all boundaries between partitions are multiples of 1024 kB

    in short i have w7 with 5 partition , how can i check?

    thanks
    sorry for my poor english

    cheers
     
  2. mantra

    mantra Registered Member

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    what i did
    -> diskpart
    -> list disk
    -> select disk 0
    xp
    Partition ### Type Size Offset
    ------------- ---------------- ------- -------
    Partition 1 Primary 60 GB 31 KB
    Partition 0 Extended 871 GB 60 GB
    Partition 2 Logical 119 GB 60 GB
    Partition 3 Logical 118 GB 179 GB
    Partition 4 Logical 100 GB 298 GB
    Partition 5 Logical 499 GB 398 GB
    Partition 6 Logical 33 GB 897 GB

    -> select disk 1
    -> list partition
    w7
    Partition ### Type Size Offset
    ------------- ---------------- ------- -------
    Partition 1 Primary 100 GB 1024 KB
    Partition 0 Extended 831 GB 100 GB
    Partition 2 Logical 58 GB 100 GB
    Partition 3 Logical 174 GB 158 GB
    Partition 4 Logical 598 GB 332 GB

    but does this info help?
     
  3. markymoo

    markymoo Registered Member

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    Only need to bother for SSD but it good practice to get into the habit for current drives and future standards. Setting it to 1024K ensures it correctly aligned for all brands of SSD.

    Goto Start Menu then Run and type cmd then press OK. In black cmd box type: wmic partition get Name,StartingOffset,Size

    this command also works and also shows the page size. fsutil fsinfo ntfsinfo c:

    also

    Start Run msinfo32. in msinfo goto components, storage,disks,partition starting offset

    If you see 1024K and 4K(4096 bytes) in your settings then your correctly aligned.

    So a custom offset size 1024K(1048576 bytes) and custom file allocation size of 4096 bytes is correctly aligned with a typical SSD, which has a 512 block and erase block size and a 4K page size.
     
    Last edited: Mar 17, 2011
  4. mantra

    mantra Registered Member

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    with
    there is not such information

    give me
    bytes for sector 512
    byte for cluster 4096
    byte for for filerecord segment 1024

    i have byte/sector 512
    sector/track 63

    are they correctly aligned ?

    and how can i check for partitions integrety ? i mean a program like disk director or paragon boot cd should notice ,shoun't?

    thanks
     
  5. markymoo

    markymoo Registered Member

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    msinfo32.jpg

    the number in yellow is the exact bytes. divide the number you see on your system by 4096(File Allocation Unit Size). If it equal a whole number, it aligned.

    eg. xp is 63 x 512 = 32,256 / 4096 = 7.875 not a whole number not aligned. a offset of just 64k would be 65,536 bytes / 4096 = 16 so aligned. MS should of used 64 to begin with.

    eg. win7 is 1024K x 512 = 52,4288 / 4096 = 128 whole number aligned.

    Try this diskalign script. http://filebeam.com/08b7a81292c7fa00202c19bf35e6e705

    wmic doesn't run on all versions of windows.

    fsutil lists file allocation unit size as bytes per cluster, so you have that part set correct, is the Windows NTFS default.

    chkdsk from a cmd box is good enough. In recovery programs is usually feature to check partition. eg. free EASEUS Partition Master 7.0.1 Home Edition, use Check Partition feature which is just chkdsk. There is a self healing of NTFS already turned on by default. It fixes corruptions without having to run chkdsk. fsutil repair query c:

    try TestDisk http://en.wikipedia.org/wiki/TestDisk
     
    Last edited: Mar 17, 2011
  6. mantra

    mantra Registered Member

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    thank
    may i ask a question
    paragon and disk director doesn't allarm me , for example when i run the recovery cd

    but Partition Table doctor 3.5 allarm me told me
    partition 6 hard disk 1 total sector is 71186432 the right sectors 71200017
    partition 1 hard disk 2 total sector is 209725433 the right sectors 209728575
    partition 3 hard disk 3 total sector is 365751785 the right sectors 365751792

    fix?
    i said no
    should i fix?
     
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