The IBM 00AR301 is a Battery-Backed Write Cache pack, designed for enterprise RAID controllers in enterprise servers. It provides backup power to the BBWC module during unexpected power loss, ensuring cached write data is safely committed to flash memory. This is a high-volume replacement part in TPM market as enterprise servers remain widely deployed.
| ports | Internal 2-port or 4-port (varies) |
| interface | 12Gb SAS |
| formFactor | Low-profile with full-height bracket |
| pcieInterface | PCIe 3.0 x8 |
| controllerMode | HBA (non-RAID) |
| supportedDevices | SAS and SATA |