RAID 0 with diff sized drives

Discussion in 'General Hardware' started by Heeter, Sep 1, 2003.

  1. Heeter

    Heeter Overclocked Like A Mother

    Messages:
    2,732
    Hi Guys,

    I have a brand new Chaintech Mobo with onboard RAID 0/1. I one 40 gig7200 and one60gig7200. My mobo manual tells me tell in RAID 0, this will come up 80gig(2x40) and the rest of the 60 gigger will be truncated. Is this true for RAID0? I always understood that RAID0 was always the culmination of all different sizes to be added together as one. Like my case, 40+60= 100gigs in RAID0. Or is it just my mobo?

    Thanks in advance

    Heeter
     
  2. Taurus

    Taurus hardware monkey

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    Location:
    Sacramento, CA
    your manual's correct. a raid stripe (raid 0) is only as big as the smallest drive times the number of drives in the array. also, it's only as fast as the slowest drive in the array.

    for these two reasons, it's ideal to have identical drives in an array (stripe or mirror). same make, model, and size.
     
  3. Heeter

    Heeter Overclocked Like A Mother

    Messages:
    2,732
    Thanks Taurus, for that clrification.


    Heeter
     
  4. Taurus

    Taurus hardware monkey

    Messages:
    3,206
    Location:
    Sacramento, CA
    happy raiding. ;)
     
  5. Zedric

    Zedric NTFS Guru Folding Team

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    Location:
    Sweden
    The more technical reason is this:
    Code:
    RAID 0 - Stripe:
    ======================
    Disk 1		Disk 2
    ------		------
    |  1 |		|  2 |
    |  3 |		|  4 |
    |  5 |		|  6 |
    |  7 |		|  8 |
    |  9 |		| 10 |
    | 11 |		| 12 |
    | 13 |		| 14 |
    | 15 |		| 16 |
    ------		| :( |
                    | :( |
                    | :( |
                    ------
    Every other blockr is written on each disk. So when one disk ends, no more blocks can be used.