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  • 1.  SSA RAID Issue

    Posted Thu October 26, 2006 10:29 AM

    Originally posted by: SystemAdmin


    Hi,

    We have a hdisk at RAID 5. It had a 9.1GB and 4.5GB disk as members and running in 'degraded' state. We added a 9.1GB disk and it rebuilt successfully. Then we swapped 4.5GB to 9GB disk and again rebuild was successfull. Still the RAID Array is showing it as 9GB hdisk, whereas it should be 18GB (9.1GB*3). Any idea why and how we make it 18GB. Thanks in advance.

    Jay.
    #AIX-Forum


  • 2.  Re: SSA RAID Issue

    Posted Fri October 27, 2006 07:35 AM

    Originally posted by: SystemAdmin


    That's not how it works. For an SSA RAID array, all of the disks are logicallky truncated to the size of the smallest disk. So when it was originally set up you effectively had 2x4.5GB disks, hence 9GB. Unfortunately, there is no way of changing that after the fact: this array will always be 2x4.5GB, no matter what size the replacement disks are.

    The only way to change it would be to delete the array and re-create it. (For availability, better to build a new array on 9GB disks then do a migratelv, or something like that. Or even just leave it, and use both array's.)
    #AIX-Forum


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