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IT19198: "QUERY SAN" WILL DISPLAY SAME DEVICE FILE TWICE EVEN THOUGH AN ALTERNATE PATH TO THE DEVICE EXISTS

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APAR status

  • Closed as program error.

Error description

  • Currently, the SANdiscovery function, expects that one physical
    tape device has one device file on the operating system.
    If a device is connected to two different ports on the same FC
    adapter or to two different FC adapters and appears as two
    devices to the operating system,
    the server displays the first device file twice instead of
    displaying each device file.
    For example:
    On a Linux server there are two FC adapters and a tape device is
    connected to both.
    A non-IBM tape drive is discovered as /dev/tsmscsi/mt0 and has
    an alternate path of /dev/tsmscsi/mt1
    tsmdlst shows:
    tsmdlst
    Index Minor Host CHN ID  LUN Type Vendor_ID Device_Serial_Number
    Product_ID       Rev.
    000   034   009  000 001 000 001  STK       serial_numberX
      T10000D           4.10
    001   035   005  000 003 000 001  STK       serial_numberX
    T10000D          4.10
    
    so the same tape device is attached to two different HBAs.
    
    "query san" reports the same device name twice:
    DRIVE        STK          T10000D              serial_numberX
    /dev/tsmscsi/mt0
    DRIVE        STK          T10000D              serial_numberX
    /dev/tsmscsi/mt0
    
    instead of /dev/tsmscsi/mt0 and the alternate path
    /dev/tsmscsi/mt1
    
    
    This affects IBM devices configured with IBM device driver as
    well as non-IBM devices.
    Physical  and virtual tape and library devices are affected.
    
    So if a path uses /dev/tsmscsi/mt0 and sandiscovery needs to
    update the path for some reason, it will use /dev/tsmscsi/mt0
    again rather than the alternate path of /dev/tsmscsi/mt1 .
    
    
    IBM Spectrum Protect versions affected:
    Server 6.3.x, 7.1.x and 8.1.x on Linux
    platforms.
    
    
    
    Initial Impact: Low
    
    Additional Keywords:  TSM IBM Spectrum Protect sandiscovery san
    hba path
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All IBM Spectrum Protect server users of SANdiscovrey        *
    * function.                                                    *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See error description.                                       *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Apply fixing level when available.                           *
    * This problem is projected to be fixed in levels 7.1.8 and    *
    * 8.1.2.100.                                                   *
    * Note that this is subject to change at the discretion of     *
    * IBM.                                                         *
    ****************************************************************
    

Problem conclusion

  • This problem was fixed.
    Affected platforms: Linux.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT19198

  • Reported component name

    TSM SERVER

  • Reported component ID

    5698ISMSV

  • Reported release

    71L

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-02-09

  • Closed date

    2017-03-29

  • Last modified date

    2017-03-30

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    TSM SERVER

  • Fixed component ID

    5698ISMSV

Applicable component levels

  • R62L PSY

       UP

  • R63L PSY

       UP

  • R71L PSY

       UP

  • R81L PSY

       UP



Document information

More support for: Tivoli Storage Manager

Software version: 7.1.3

Reference #: IT19198

Modified date: 30 March 2017