IT49068: STORAGE INSIGHTS CALCULATES INCORRECT ZERO BUFFER CREDIT PERCENTAGE VALUES FOR BROCADE SWITCHES.

APAR status

• Closed as program error.

Error description

• Customers monitoring Brocade Fibre Channel switches in Storage
  Insights may observe that the Zero Buffer Credit Percentage
  metric does not align with the values reported by the switch.
  
  An issue was identified in the calculation logic used to derive
  the Zero Buffer Credit Percentage when processing data collected
  from Brocade switches.
  
  The inconsistency affects the metric calculation across
  different component levels (port and switch), which may result
  in inaccurate or inconsistent reporting within Storage Insights.
  
  
  This discrepancy can cause confusion when customers attempt to
  assess congestion conditions or credit starvation events using
  the reported metric.
  

Local fix

• N.A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * IBM Storage Insights users viewing details of monitored      *
  * storage devices                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Customers monitoring Brocade Fibre Channel switches in       *
  * Storage                                                      *
  * Insights may observe that the Zero Buffer Credit Percentage  *
  * metric does not align with the values reported by the        *
  * switch.                                                      *
  *                                                              *
  * An issue was identified in the calculation logic used to     *
  * derive                                                       *
  * the Zero Buffer Credit Percentage when processing data       *
  * collected                                                    *
  * from Brocade switches.                                       *
  *                                                              *
  * The inconsistency affects the metric calculation across      *
  * different component levels (port and switch), which may      *
  * result                                                       *
  * in inaccurate or inconsistent reporting within Storage       *
  * Insights.                                                    *
  *                                                              *
  *                                                              *
  * This discrepancy can cause confusion when customers attempt  *
  * to                                                           *
  * assess congestion conditions or credit starvation events     *
  * using                                                        *
  * the reported metric.                                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• The fix for this APAR is targeted for the following release:
  
  IBM Storage Insights 2Q26   [ 54X-IBM-SI ]
  ( release target 2Q 2026 / June )
  
  The target dates for future releases do not represent a formal
  commitment by IBM. The dates are subject to change without
  notice.
  

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

  STORAGE INSIGHT

• Fixed component ID

  5608TPCSI

Applicable component levels