IV50830: SVGS USE ONLY 254 MWC RECORDS INSTEAD OF 510 APPLIES TO AIX 7100-03

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Scalable Volume Groups use 254 MWC records instead of 510
  during writes.
  

Local fix

Problem summary

• SVGs are only using 254 mwc rec entries instead of the
  potential 510 that we allocate space for.  The affect of this
  is that for active MWC LVs, you can essentially only be writing
  to 254 LTGs at once instead of 510.  This could be limiting
  performance capabilities with some workloads.
  

Problem conclusion

• Correct mwc rec size definitions to properly use all 510
  slots.
  

Temporary fix

Comments

• 5300-12 - use AIX APAR IV53135
  6100-07 - use AIX APAR IV58301
  6100-08 - use AIX APAR IV57885
  6100-09 - use AIX APAR IV50542
  6100-09 - use AIX APAR IV50542
  6100-09 - use AIX APAR IV50542
  7100-01 - use AIX APAR IV57583
  7100-02 - use AIX APAR IV49870
  7100-03 - use AIX APAR IV50830
  

APAR Information

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

  IV49870

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

  U866400

Fix information

• Fixed component name

  AIX V7.1

• Fixed component ID

  5765H4000

Applicable component levels

• R710 PSY U866400

     UP14/05/22 I 1000