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IT24930: EMPTY PV IN VOLUME GROUP MAY CAUSE FILE RESTORE TO FAIL

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • When a volume group contains an empty physical volume (a PV that
    contains no extents) and file level restore is in use and an
    attempt to restore any file from that node will fail.
    
    Apr 18 14:00:26 2018[10.214.1.40] Output: ['Found duplicate PV
    
    cmitZt2lr81GmBqxEebV0e3fzOkXqFVB: using /dev/sdb2 not
    /dev/sda2',
    
    'Using duplicate PV /dev/sdb2 without holders, replacing
    /dev/sda2',
    
    'Found duplicate PV rffImPmyOR3exNZ2zsqu9JO2KuhgNwE3: using
    /dev/sdb3
    
    not /dev/sda3', 'Using duplicate PV /dev/sdb3 which is last
    seen,
    
    replacing /dev/sda3', 'Volume group "vgname" not found', 'Cannot
    
    process volume group vg_root_Vxb']
    
    Apr 18 14:00:26 2018[10.214.1.40] Could not deactivate volume
    group
    
    vg_root_Vxb
    
    Apr 18 14:00:26 2018[10.214.1.40] Removed disk sdb
    
    Apr 18 14:00:26 2018[10.214.1.40] Completed unmount operation in
    6s
    
    Apr 18 14:00:27 2018Dismount disks: Completed (1 objects)
    
    Apr 18 14:00:27 2018Acquiring lock for VM (vmname).
    
    Apr 18 14:00:27 2018Unmount VM disks: Dismounting VM (vmname)
    
    disks
    
    
    
    The problem is caused by an uncatalogued empty PV that is
    required by LVM when mounting the volume group during the
    restore.
    

Local fix

  • It is not possible to update the catalog for an existing backup,
     but removal of the empty PV will allow future backup to be
    restorable.   Also, this only effects file level restores.  Full
     VM and VMDK restores are unaffected.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * IBM Spectrum Protect Plus levels 10.1.1 and 10.1.2           *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Apply fixing level when available. This problem is currently *
    * projected to be fixed in level 10.1.3. Note that this is     *
    * subject to change at the discretion of IBM.                  *
    ****************************************************************
    

Problem conclusion

  • During file indexing, IBM Spectrum Protect Plus used a technique
    of discovering LVM (Logical Volume Manager) VG (Volume Group)
    information which only detected PVs (Physical Volumes)
    containing allocated LV (Logical Volume) extents. Physical
    volumes that did not contain allocated extents  were missed.
    This resulted in failures during file restore because the VG
    could not be imported due to missing PVs. The problem has been
    resolved by updating the LVM discovery logic to ensure that it
    detects all PVs that comprise a VG, including unused ones.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT24930

  • Reported component name

    SP PLUS

  • Reported component ID

    5737SPLUS

  • Reported release

    A11

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-05-10

  • Closed date

    2018-11-30

  • Last modified date

    2018-11-30

  • 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

    SP PLUS

  • Fixed component ID

    5737SPLUS

Applicable component levels

[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSNQFQ","label":"IBM Spectrum Protect Plus"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"A11","Line of Business":{"code":"LOB26","label":"Storage"}}]

Document Information

Modified date:
30 January 2024