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Lin_tape and Control Point Failover

Discussion in 'Tape / Media Library' started by dmarsee, Nov 6, 2009.

  1. dmarsee

    dmarsee New Member

    Jan 6, 2005
    Likes Received:
    Greetings. I have a RHEL 4 box running TSM using lin_tape(d) 1.23.0 and ibmatl to access a shared 3584 library managed by another TSM server. I've added the appropriate options line to /etc/modprobe.conf to implement tape path and control point failover, and while the tape path failover looks fine:

    cat /proc/scsi/IBMtape
    lin_tape version: 1.23.0
    lin_tape major number: 253
    Attached Tape Devices:
    Number model SN HBA FO Path
    0 03592J1A 000001234567 qla2xxx Primary
    1 03592J1A 000002345678 qla2xxx Primary
    2 03592J1A 000003456789 qla2xxx Primary
    3 03592J1A 000004567890 qla2xxx Primary
    4 03592J1A 000001234567 qla2xxx Alternate
    5 03592J1A 000002345678 qla2xxx Alternate
    6 03592J1A 000003456789 qla2xxx Alternate
    7 03592J1A 000004567890 qla2xxx Alternate

    the control point failover does not:

    cat /proc/scsi/IBMchanger
    lin_tape version: 1.23.0
    lin_tape major number: 253
    Attached Tape Devices:
    Number model SN HBA FO Path
    0 03584L22 0000000A12345678 qla2xxx NA
    1 03584L22 0000000A12345678 qla2xxx NA

    It sees both paths to the library, but does not set them up as a Primary-Alternate pair like I expected or as the docs say it should. The 3584 library does have the failover path feature code installed. Is this what I should be seeing since this server is not the library manager, or should I see the Primary-Alternate failover paths anyway, or does it even matter if it's set up Primary-Alternate or not since it shows both paths to the library control point? I am planning to migrate the library manager function to this TSM server, but am hesitant to do so until I have this control point failover question resolved. Any insight is appreciated.


  3. moon-buddy

    moon-buddy Moderator

    Aug 24, 2005
    Likes Received:
    Electronics Engineer, Security Professional
    Somewhere in the US
    I believe that what you are seeing is correct since as you said "since this server is not the library manager".
: lin_tape

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