Topic
4 replies Latest Post - ‏2013-05-31T17:04:54Z by raouf834
SystemAdmin
SystemAdmin
6907 Posts
ACCEPTED ANSWER

Pinned topic AIX hangs when the DS5020 lun ownership changes

‏2013-03-11T11:47:38Z |
Dear All,
I have DS 5020 which hangs whenever I change the lun ownership from one controller to another controller.When I do df -g, I can see the filesystems from the storage mounted but when i do change directory to that filesystem I cannot create any files there and I/O simply stops.The storage firmware is as follows:
Controller_Code_07738000
AIX Oslevel:6.1 tl 5
Updated on 2013-03-27T04:08:34Z at 2013-03-27T04:08:34Z by SystemAdmin
  • nagger
    nagger
    342 Posts
    ACCEPTED ANSWER

    Re: AIX hangs when the DS5020 lun ownership changes

    ‏2013-03-25T23:40:31Z  in response to SystemAdmin
    Hi,
    This sounds like a zoning or SAN problem.
    As far as AIX sees it the disks was online and it will be caching filesystem structure and data in the AIX file system cache.
    After the change of controller the disk is offline but it can find and use some things in the cache but physical I/O is failing now.

    Cheers, Nigel
  • SystemAdmin
    SystemAdmin
    6907 Posts
    ACCEPTED ANSWER

    Re: AIX hangs when the DS5020 lun ownership changes

    ‏2013-03-27T04:08:34Z  in response to SystemAdmin
    Thanks a lot for reply.But my storage and server are directly connected and not via the SAN switch.
  • raouf834
    raouf834
    1 Post
    ACCEPTED ANSWER

    Re: AIX hangs when the DS5020 lun ownership changes

    ‏2013-05-31T17:04:54Z  in response to SystemAdmin

    hello

    we had the same problem ,i think u should switch off the aix server and then the ds storage ,after that switch on the exp of ds let time to reinitialisation , after switch on the DS controllers let reinitialised for 1 min  ,after that switch on ur aix server i hope i'll solve the problem