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  • 1.  How to make GPFS to recognize the change in disk size?

    Posted Mon November 10, 2008 12:05 AM

    Originally posted by: SystemAdmin


    My customer has a GPFS cluster, with a file system called gpfs_fs. That filesystem consists of only 1 NSD disk, called gpfs_nsd (the correspondent hdisk is hdisk3)
    Now the customer increased the capacity of the hdisk3, and AIX recognizes the change, but when issuing mmdf command the gpfs_nsd still shows the old capacity.

    So how can they make GPFS to recognize (refresh) the change of the NSD? If there are more than 2 NSD disks in the filesystem, I can move the data to the remain NSD disks and re-format the changed NSD disk and add it again, but there is only 1 disk so how can we do that? (the data is online)

    Tks in adv.


  • 2.  Re: How to make GPFS to recognize the change in disk size?

    Posted Mon November 10, 2008 10:28 AM

    Originally posted by: gcorneau


    The answer is: delete the file system, delete the NSD, re-create the NSD and re-create the file system.

    GPFS does not support the dynamic changing of NSD size. If you wish to grow a GPFS file system, you should add a new LUN, define it as an NSD and add it to the file system.

    Sorry.
    Glen Corneau
    IBM Power Systems Advanced Technical Support


  • 3.  Re: How to make GPFS to recognize the change in disk size?

    Posted Tue November 11, 2008 02:26 AM

    Originally posted by: SystemAdmin


    Thank you Glen,

    I'll go for the 2nd option (creating new LUN & add more NSD).
    But if customer wants to delete the FS, they have to back up their data first right? It would take time since the capacity is really large.


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