HyperPAV operations

Use the following commands for HyperPav operations in your sysplex:

Use the D M=DEV command to determine the number of aliases that are configured in a control unit’s alias pool.
Use the D M=DEV(devnum), where devnum is a base HyperPAV volume to display information about device devnum and the total number of aliases configured in the pool.
Use D M=DEV(devnum), where devnum is a HyperPAV alias device to display information on the HyperPAV alias.

For example, Figure 1 shows the information that can be returned by the D M=DEV command.

Figure 1. Example: Results from D M=DEV command

SY1  D M=DEV(710)
      SY1  IEE174I 14.43.54 DISPLAY M 762
      DEVICE 0710   STATUS=ONLINE
      CHP                   10   20   30   40
      DEST LINK ADDRESS     10   20   30   40
      PATH ONLINE           Y    Y    Y    Y
      CHP PHYSICALLY ONLINE Y    Y    Y    Y
      PATH OPERATIONAL      Y    Y    Y    Y
      MANAGED               N    N    N    N
      CU NUMBER             0700 0700 0700 0700
      MAXIMUM MANAGED CHPID(S) ALLOWED:  0
      DESTINATION CU LOGICAL ADDRESS = 07
      SCP CU ND         = 002107.000.IBM.TC.119B9E00FF07.00FF
      SCP TOKEN NED     = 002107.900.IBM.TC.119B9E00FF07.0700
      SCP DEVICE NED    = 002107.900.IBM.TC.119B9E00FF07.0710
      HYPERPAV ALIASES IN POOL  4

You can determine the current HYPERPAV setting on the system using the D IOS,HYPERPAV command. Figure 2 shows an example of the command results.

Figure 2. Example: Results from D IOS,HYPERPAV command

  SY1  d ios,HYPERPAV
      SY1  IOS098I 14.40.52 HYPERPAV DATA 751
      HYPERPAV MODE IS SET TO YES

Note that the presence of non-FICON channels to a HyperPAV-capable control unit will cause the system to operate on base devices in that logical subsystem (LSS) in base only mode. In base only mode, it is not possible for the system to use alias devices for bases in the logical control unit. You might receive message IOS166E indicating that the HYPERPAV LSS for a device is now in base only mode. You can also detect the condition using the D M=DEV(bbbb) command where bbbb is a base device in the logical control unit. Once this condition is resolved by removing or configuring offline the non-FICON channels from the HyperPAV configuration, HyperPAV aliases might be usable. However, might have to force the system to rediscover aliases that were not previously discovered using the VARY command, where bbbb is an online base device in the logical control unit:

VARY bbbb,ONLINE,UNCOND