OA49183: DYNAMIC ACTIVATE INCORRECT IN ALTERNATE SUBCHANNEL SET SS1 SS2

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• With OA44240 applied, performing a dynamic activate to add 3390B
  and 3390D devices should add the correct device to the active
  UCB Look Up Table (ULUT) to make that UCB accessible.  This does
  not work correctly when the active subchannel set is non-zero.
  
  This only affects dynamic activates when the active subchannel
  set is not 0.
  
  EXTERNAL SYMPTOMS:
  With PPRC active, this will cause a vary online to fail:
    IEE103I UNIT dddd NOT BROUGHT ONLINE
    IEE763I NAME= IECDINIT CODE= 0000000001100889
    IEA434I DEVICE ONLINE IS NOT ALLOWED, IT IS A PPRC SECONDARY
    DEVICE
    IEE764I END OF IEE103I    RELATED MESSAGES
  
  VERIFICATION STEPS:
   1. Verify that when a dynamic activate was performed, the
      active subchannel set was nonzero.  This can be displayed
      with D IOS,CONFIG, or if a dump is available, can be seen
      with the following IPCS command:
        ip l 10?+7c?+d0?+170 len(1)
  
   2. Verify that the dynamic activate added 3390D alternate
      subchannel set devices.  The IOS502I message will list which
      devices were added:
        DEVICE(S) ADDED TO SOFTWARE CONFIGURATION FOR SUBCHANNEL
        SET 1
         dddd-dddd
  
   3. Verify that after the activate, the subchannel set 0 device
      is accessible rather than the expected one.  The expected
      primary device in the currently active subchannel set will
      show "SPECIAL"
         d m=dev(1dddd)
         SY1  IEE174I 12.44.30 DISPLAY M 612
         DEVICE 10830   STATUS=OFFLINE, SPECIAL
  

Local fix

• Avoid dynamic activates when the active subchannel set is
  something other than 0.  If this problem is encountered, then
  the following steps must be taken to resolve it:
   - Dynamic activate to delete the newly added 3390B and 3390D
     devices
   - HyperSwap so that subchannel set 0 is now active
   - Dynamic activate to re-add the devices when subchannel set 0
     is the active set
  
  or
   - IPL will also resolve the issue
  
  PE Information:
  User's Affected:
  This problem affects users with APAR OA44240 applied
  (PTFs UA90740 (HBB7780), UA90741 (HBB7790), UA90742
  (JBB778H)) and with the active subchannel set not
  subchannel set 0. In this environment, a Dynamic Activate
  that adds 3390B/3390D device pairs will result in
  the 3390B devices being added to the active subchannel
  set instead of the 3390D devices as expected.
  
  User Impact:
  APAR OA44240 provided Multi-Target PPRC support but
  introduced a new problem.
  When the active subchannel set is not the subchannel
  set 0, a Dynamic Activate to add 3390B/3390D device
  pairs will only add the 3390B devices to the active
  subchannel set instead of the 3390D devices as expected.
  Display command for the active device will show the
  device in subchannel set 0:
   D M=DEV(dddd)
    IEE174I 11.32.11 DISPLAY M 378
    DEVICE 0dddd   STATUS=status
  Display command for the device in the currently active
  subchannel set will show it is being 'SPECIAL':
   D M=DEV(ndddd)     'n'=the active subchannel set number
    IEE174I 11.32.02 DISPLAY M 372
    DEVICE ndddd   STATUS=OFFLINE, SPECIAL
  
  Customers are better off with keeping APAR OA44240 on
  their systems if they are running with subchannel set 0
  as the active subchannel set or they are running with a
  non-zero active subchannel set but do not plan to
  dynamically add 3390B/3390D device pairs via
  Dynamic Activate (ACTIVATE command).
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users at HBB7780 and above with PTFs         *
  *                 UA90740, UA90741 or UA90742 applied.         *
  ****************************************************************
  * PROBLEM DESCRIPTION: When the active subchannel set is an    *
  *                      alternate (non-zero) subchannel set,    *
  *                      the 3390D device in a 3390B/3390D       *
  *                      device pair is not available in the     *
  *                      active subchannel set after a Dynamic   *
  *                      Activate is performed to add the pair.  *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When the current active subchannel set is one of the alternate
  (non-zero) subchannel sets, a Dynamic Activate to add
  3390B/3390D device pairs does not result in the 3390D devices
  being added to the active subchannel set.
  
  During the construction of the device look up table for the
  active subchannel set, a check is made to determine if a device
  in an alternate subchannel set is a 3390D (PPRC secondary)
  device and if so it should be included in the active device
  look up table. However, the check incorrectly results in the
  3390D device not being added to the active device look up
  table.
  

Problem conclusion

• Dynamic Activate processing is updated to correctly add 3390D
  devices in 3390B/3390D device pairs to the active device look
  up table.
   KEYWORDS: HYPERSWP/K
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

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

  UA80277 UA80278 UA80279

Modules/Macros

• IOSVCMUB
  

Fix information

• Fixed component name

  IOS

• Fixed component ID

  5752SC1C3

Applicable component levels

• R7A0 PSY UA80277

     UP16/01/20 P F601 «

• R780 PSY UA80278

     UP16/01/20 P F601 «

• R790 PSY UA80279

     UP16/01/20 P F601 «

Fix is available

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