HPE P48811-B21 2SFF U.3 HDD Stacking Kit for ProLiant DL380 Gen11

Overview

The P48811-B21 is a factory-new HPE stacking kit that enables dual 2.5-inch Small Form Factor (2SFF) U.3 drive installations in the HPE ProLiant server platform. If you're expanding storage density in a DL380 Gen11 deployment and need to stack an additional 2SFF U.3 HDD bay on top of an existing drive cage, this kit provides the mechanical hardware to do it cleanly — no improvised brackets, no voided support agreements. At 1.01 lb, it ships light but delivers the structural support needed for production server environments where drive security and airflow management matter.

Compatibility

This kit is designed specifically for the HPE ProLiant DL380 Gen11 (G11) platform in a 2SFF U.3 drive bay configuration. U.3 is the tri-mode interface standard that supports NVMe, SAS, and SATA drives over a single connector — meaning this stacking kit is compatible with the full range of U.3-capable HDDs and SSDs qualified for the DL380 Gen11. Verify your current drive cage configuration against HPE's QuickSpecs for the DL380 Gen11 before ordering: this kit fits the 2SFF stacking scenario, not the 4LFF or 8SFF large-form-factor cage variants. If you're building out high-density storage for video surveillance NVR workloads or data-intensive applications, confirm U.3 backplane presence in your specific chassis configuration.

Installation Notes

Manufactured in Brazil and China (Country of Origin: BR/CN) and classified under UNSPSC 43211600 (computer hardware). Installation follows standard HPE tool-less or Torx-assisted drive cage procedures for the DL380 Gen11 — consult the server's maintenance and service guide for torque specifications and ESD handling requirements. No additional power or data cabling is included; this is a mechanical stacking bracket kit only. Plan for standard rack maintenance access clearance when stacking drives in a populated 2U chassis.