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Change the queue_depth of a IBM hard disk

  • 1.  Change the queue_depth of a IBM hard disk

    Posted Wed February 07, 2007 12:27 PM

    Originally posted by: SystemAdmin


    I can not change the parameter of my IBM Hdisk on p550 with 5.3L OS. It was set as FALSE
    #lscfg -vl hdisk2
    hdisk2 U787B.001.DNWCC54-P1-T14-L5-L0 16 Bit LVD SCSI Disk Drive (73400 MB)
    Manufacturer................IBM H0
    Machine Type and Model......ST373454LC
    EC Level....................H13979
    Part Number.................26K5571
    Brand.......................H0
    1. lsattr -El hdisk2 -a queue_depth
    queue_depth 3 Queue DEPTH False
    I want to increase the value becuase some of the IBM tech papers suugested and imporved the oracle (my is 10gR2) performance.


  • 2.  Re: Change the queue_depth of a IBM hard disk

    Posted Wed February 07, 2007 06:36 PM

    Originally posted by: dukessd


    The "False" means it cannot be changed, if it said "True" then you could change it with chdev, or similar..
    As it says false, your OS / ML / TL is not able to change it.
    If you run: lsattr -HEl hdisk2 blah, you will see the header for this column is user_settable. So in your case user_settable is False, so you cannot set it.


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