IT38021: "VSNAP DISK SHOW" IS INACCURATE ON VSNAPS RUNNING ON RHEL/CENTOS 8.X.

APAR status

• Closed as program error.

Error description

• Output of "vsnap disk show" on IBM Spectrum Protect Plus VSNAP
  servers, running on RHEL/CentOS 8.x. with multipath disks, is
  inaccurate.
  Below is an example of "vsnap disk show" output where all disks
  are multipath disks.
  Only one of the disks is correctly displayed as multipath and
  the rest of the disks are displayed as standard disks.
  
  UUID                             | TYPE  | VENDOR | MODEL
    | SIZE    | USED AS     | KNAME | NAME
  ---------------------------------------------------------------
  --------------------------------------------------------
  60050768108001ba7000000000000007 | MPATH | IBM    | 2145
    | 20.00TB | crypto_LUKS | dm-11 | /dev/mapper/mpathg
  60050768108001ba7000000000000003 | SCSI  | IBM    | 2145
    | 20.00TB | unused      | sdat  | /dev/sdat
  60050768108001ba7000000000000004 | SCSI  | IBM    | 2145
    | 20.00TB | unused      | sdau  | /dev/sdau
  

Local fix

• Force option must be used when creating the vsnap pool.
  vsnap pool create --name myTestPool --force --disk_list
  /dev/mapper/mpatha,/dev/mapper/mpathb,/dev/mapper/mpathc
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * IBM Spectrum Protect Plus level 10.1.8 and 10.1.9.           *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply fixing level when available. This problem is currently *
  * projected to be fixed in IBM Spectrum Protect Plus level     *
  * 10.1.10. Note that this is subject to change at the          *
  * discretion of IBM.                                           *
  ****************************************************************
  

Problem conclusion

• vSnap constructs disk information by parsing the output of the
  system command "lsblk". Starting with RHEL 8.x, the output of
  "lsblk" is structured differently and does not match the output
  from RHEL 7.x. The vSnap code did not parse the results
  correctly resulting in incorrect disk information being
  displayed. The problem has been resolved by updating the vSnap
  code to correctly handle the new output format of "lsblk" on
  RHEL 8.x.
  

Temporary fix

Comments

APAR Information

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

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

Modules/Macros

• vSnap    ZFS
  

Fix information

• Fixed component name

  SP PLUS

• Fixed component ID

  5737SPLUS

Applicable component levels