IC75940: SVC CREATES MULTIPLE HOST ENTRIES WHEN A SINGLE HOST HAS MULTIPLE PORTS/WWPNS

4.2.1 Interim Fix 1 (November 2011) for Tivoli Storage Productivity Center

APAR status

• Closed as program error.

Error description

• svc provisioning in tpc creates multiple host entries when a
  single host has multiple ports/WWPNs. it should create only one
  host entry, and list the different ports/paths.
  

Local fix

• use svc gui/cli for provisioning instead of tpc.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of TPC 4.2.1                           *
  ****************************************************************
  * PROBLEM DESCRIPTION: TPC's behavior in Hostport assignment   *
  *                      provisionig is that TPC handles each    *
  *                      single Hostport alone. TPC does not     *
  *                      group any Hostports together to Hosts,  *
  *                      even if that is possible with a         *
  *                      storage system like SVC.                *
  *                                                              *
  *                      The effect is that the customer sees    *
  *                      many host definitions defined at the    *
  *                      storage system with only one WWPN       *
  *                      inside, sometimes multiple for the      *
  *                      same physical host.                     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  TPC won't change this behavior. There are design reasons for
  making sure that hostport assignment operations can succeed
  in the most flexible ways to combine LUNs and WWPNs with
  each other. If customers want to have multiple Host WWPNs
  defined in the storage system as one Host, they have to
  predefine the Host definition in the storage system user
  interface.  TPC will then reuse that definition. Otherwise,
  TPC will always create a new definition for every single
  unknown Host WWPN.
  

Problem conclusion

• TPC added a config option, which allows the customer to
  allow TPC to define a set of WWPNs in one host definition.
  Whenever customers then do hostport assignment with many
  hostports, TPC will then create only one new host definition
  for all new unknown WWPNs, instead of many host definitions.
  This option is only changing the behavior for SVCs.
  
  tpctool> setdscfg -user <superuser> -pwd <password> -url
  <TPCServer Hostname>:9550 -property
  Configuration.UseMultipleWWPNsPerHost -context DiskManager true
  

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:

Fix information

• Fixed component name

  MULTIPLE DEVICE

• Fixed component ID

  5648HWN01

Applicable component levels

• R420 PSY

     UP