ServeRAID M5000 Series battery backup unit always in 'Charging' state - IBM System x



Source

RETAIN tip: H211025

Symptom

When running firmware 12.12.0-0111, 12.12.0-0126, 12.12.0-0133, or 12.13.0-0153 on a ServeRAID M5000 Series SAS/SATA Controller, with an iBBU07 battery attached, after a relearn completes, the event logs may not indicate 'Battery Charge Complete'.

The Charging Status in both MegaRAID Storage Manager and MegaCLI will also remain in the 'Charging' state indefinitely. MegaCLI will also report the Fully Charged status as 'None'. The overall status, however, indicates 'Optimal'.

Users can determine which battery is attached (iBBU07, or the newer iBBU08 which is unaffected by this issue) by looking under the Physical Tab in MegaRAID Storage Manager, and selecting the Battery Backup Unit (BBU).

Note: A battery type 'iBBU' in this output indicates iBBU07; a battery type of 'iBBU08' indicates BBU08.

MegaCLI can also be run with the following command:

  MegaCLI -AdpBbuCmd -a0

(where iBBU = Intelligent Battery Backup Unit, CLI = Command Line Interface)

Affected configurations

The system can be any of the following IBM servers:

The system is configured with one or more of the following IBM options:

This tip is not software specific.

The 12.12.0-0111, 12.12.0-0126, 12.12.0-0133, or 12.13.0-0153 level of firmware for the ServeRAID M5000 Series SAS/SATA Controller is affected.

The system has the symptom described above.

Solution

This behavior was corrected in firmware 12.13.0-0179-1 of ServeRAID M5000 Series SAS/SAS Controller firmware.

The file is available by selecting the appropriate Product Group, type of System, Product name, Product machine type, and Operating System on IBM Support'ssa Fix Central web page, at the following URL:

Workaround

This status indication can safely be ignored. There is no performance impact or data impacted by this issue. The Virtual Disks will remain in Write-Back mode.

Additional information

This issue occurs because the firmware is not correctly declaring 'Charge Complete' for the band indicated by Limited Band Charging. The future firmware will address this issue by correctly declaring charge complete. For more information about Limited Band Charging, refer to RETAIN tip H21631 (MIGR-5093515).

Applicable countries and regions

 


Document id:  MIGR-5093861
Last modified:  2014-02-05
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