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Rectangular LSI battery backup unit with green circuit board and black connector, 6.0 by 6.0 by 2.0 inches

LSI

LSI LSIIBBU09 battery backup unit for MegaRAID SAS 9265 & 9285

SKU CH-N0Z4-94K9E

Battery backup unit protects MegaRAID SAS 9265 and 9285 controller cache during power loss

  • Protects cache integrity during power or server failure
  • Withstands higher ambient temperatures than earlier units
  • Offers multiple operating modes and retention times
  • Features transparent, shorter learning cycles
  • Compatible with MegaRAID SAS 9265 and 9285 controllers

Battery backup for MegaRAID controllers

The LSI LSIIBBU09 battery backup unit protects cache data on MegaRAID SAS 9265 and 9285 series controllers during unexpected power loss or server failure. It is designed for administrators who need to preserve write-cache integrity on these specific 6Gb/s RAID adapters. This unit is not for users of other controller families or for systems that do not support a dedicated BBU module.

Thermals and power characteristics

The unit tolerates higher maximum ambient temperatures than earlier LSI battery backup units, improving reliability inside warm server chassis. Multiple operating modes and retention times let the controller manage charge cycles transparently, with shorter learning cycles that reduce the time the battery spends in calibration. No separate power draw or acoustic figures are published for this module.

Mounting flexibility and controller integration

Remote mounting options allow the 6.0 x 6.0 x 2.0 inch module to be positioned away from the controller card, easing cable routing in dense chassis. The bundle includes only the battery unit itself; no additional cables, brackets or management software are supplied. Compatibility is limited to the MegaRAID SAS 9265 and 9285 series listed in the specifications.

Highlights

  • Protects cache integrity during power or server failure
  • Withstands higher ambient temperatures than earlier units
  • Offers multiple operating modes and retention times
  • Features transparent, shorter learning cycles
  • Compatible with MegaRAID SAS 9265 and 9285 controllers

Specifications

BrandLSI
ModelLSI00279 (LSIIBBU09)

Questions about this item

How is the LSIIBBU09 installed on a MegaRAID SAS 9265 or 9285 controller?

Connect the unit to the controller's dedicated battery header, then secure it using the remote mounting kit to place it anywhere inside the chassis. The step often missed is routing the cable clear of airflow obstructions.

What maintenance or replacement will the LSIIBBU09 need over time?

The battery module itself is the consumable component; plan to replace the unit when the controller reports reduced cache retention or a failed learn cycle during its periodic self-test.

What thermal limit appears first when the LSIIBBU09 runs under sustained load?

The unit is rated for a higher maximum ambient temperature than previous LSI battery backup units, so the controller's own thermal throttle point will typically be reached before the backup unit hits its limit.

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