Guest

Preview Tool

Cisco Bug: CSCub12581 - Storage subsystem must generate events on battery state changes.

Last Modified

Dec 02, 2013

Products (1)

  • Cisco Unified Computing System

Known Affected Releases

1.4(7.5)

Description (partial)

Symptom:
RAID subsystem Virtual Drive write performance can drop without warning from the CiMC.

Conditions:
If an installed RAID card has a battery backed write-back RAM cache, the battery will occasionally need to go through a relearn (refresh) cycle.  While the battery is discharging and recharging, it is not safe to only write data to RAM, so the cache goes into write-through mode, which slows (sometimes severely) Virtual Drive performance.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.