Description: HP 64MB Battery Backed Write Cache (BBWC) Enabler 641/642
Part Number(s)
Hewlett-Packard Part# 291969-B21
Overview:
The BBWC Enabler transportable 64-MB battery module increases the total memory of the controller to 128-MB for code transfer buffers and read and write cache. The transportability of the battery memory module protects the write cache data from unexpected power loss system board failure or controller board failure. Data retained in the write cache will be protected for up to 72 hours allowing time to restore power or transport the module to a functioning system board or array controller.
The modular design of the battery memory module is transportable between the Smart Array 641 and Smart Array 642 controllers. 64-MB BBWC (Battery-Backed Write Cache) Enabler allows the 641/642 controllers an option to add transportable BBWC for improved controller performance and increases the total controller memory to 128-MB.
Part#291969-B21 and Products ID1015233 Purchased after January 01 2012 is covered by an Unconditional Lifetime Warranty for as long as you own your
server
Genuine HP 291969-B21
Security ID
1015233
S/C: 2310152331 PN: 291969-B21
This product will have a Genuine HPE security sticker. We do not sell 3rd party HPE products.
291969-B21 Flat Rate Shipping Options
We have 23 pieces of 291969-B21 in stock and ready to ship as of
Friday 10th of July 2026
291969-B21
This product has a 30 Day return and a Lifetime replacement warranty.
