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Reply to: RAID confusion

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Previously on "RAID confusion"

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  • gadgetman
    replied
    This is now resolved. The 3TB volume created by the Intel Matrix app in XP was not recognised by the OS.

    So I went back to the BIOS and created a 2TB volume (the maximum allowed). Then I selected Create New Volume again and it offered the remaining space.

    The confusion was that on the initial "Create New Volume" it said that 2TB was 100% of the space available with no indication that there was any additional capacity left to allocate to further volumes.

    Anyway I've now got my 3TB spread over two logical drives.
    Last edited by gadgetman; 24 September 2008, 07:56.

    Leave a comment:

  • gadgetman
    replied
    Unfortunately my adapter (at least in its BIOS setup) doesn't seem able to deal with 4TB. Anything above 2TB just seems to get lost.

    I am using the latest BIOS by the way, I checked last night.

    Maybe the Intel Raid software will allow me to create multiple volumes up to the total capacity. I will try this tonight.

    Originally posted by dmini View Post
    A server can have far more than 2Tb of disk attached - its just that you can only have 2Tb in a single volume. Any restrictions beyond that point are unit based

    Leave a comment:

  • gadgetman
    replied
    About 18 months.

    It uses the "Intel® ICH9R SATA RAID controller hub"

    Originally posted by TykeMerc View Post
    It's quite possibly a limitation of an older RAID chipset. It may have been designed in the days when 2Tb was unbelievably large.

    How old is your RAID adaptor?
    Last edited by gadgetman; 23 September 2008, 13:42.

    Leave a comment:

  • dmini
    replied
    A server can have far more than 2Tb of disk attached - its just that you can only have 2Tb in a single volume. Any restrictions beyond that point are unit based

    Leave a comment:

  • TykeMerc
    replied
    It's quite possibly a limitation of an older RAID chipset. It may have been designed in the days when 2Tb was unbelievably large.

    How old is your RAID adaptor?

    Leave a comment:

  • gadgetman
    replied
    Don't like the sound of that...

    I don't mind having multiple volumes but when I used the BIOS and it created the 2TB volume there was no additional space left with which to create another volume - I just seemed to be lose 1TB.

    Am I stuffed here? Is 2TB a hard limit?

    Leave a comment:

  • dmini
    replied
    NTFS isnt happy going above 2Tb as a volume. Beware
    Yes there are ways round it with sector size etc, but don't touch it would be my advice

    Leave a comment:

  • gadgetman
    replied
    It looks like a problem/limitation with the RAID BIOS.

    I deleted the volume and used the Intel Matrix app in XP to create it instead and it has given me the expected capacity.

    The RAID BIOS however now does not recognize the volume. The Intel app insisted it needed to 'Initialize' the volume which it estimates will take 14 hours so hopefully all will be well when that completes.

    Leave a comment:

  • AtW
    replied
    Check OS limitation - I think it is 2 TB per NTFS partition in earlier version of Windows.

    Leave a comment:

  • Liability
    replied
    Originally posted by gadgetman View Post
    I previously had a RAID 5 array of 4 x 500Gb drives. One volume was used for parity leaving 1.5Gb usable capacity.

    Now I have just upgraded to 4 X 1TB drives yet when I created the volume is gave me a maximum volume size of 2TB. I expected it to be 3TB.

    Anyone know what's going on?
    check the container to make sure it was created as a RAID5 set

    Leave a comment:

  • gadgetman
    started a topic RAID confusion

    RAID confusion

    I previously had a RAID 5 array of 4 x 500Gb drives. One volume was used for parity leaving 1.5Gb usable capacity.

    Now I have just upgraded to 4 X 1TB drives yet when I created the volume is gave me a maximum volume size of 2TB. I expected it to be 3TB.

    Anyone know what's going on?
    Tags: None

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