The HPE 861592-B21 is an 8TB 12G SAS 7.2K RPM 3.5" LFF midline hard drive designed for enterprise servers and storage systems. It offers hot-swappable operation with a 12G SAS interface, 512e sector formatting, and a low-profile LP carrier, and is compatible with HPE ProLiant Gen9 and Gen10 servers and supported storage systems. Commonly deployed for high-capacity storage, backup, and archival in data centers, SAN/NAS environments, and business-critical IT infrastructure, this drive carries spare part number 861608-001 and is frequently listed alongside replacement 872479-B21.
