HPE / HPE ProLiant DL385 Gen11 · Server backplane

HPE ProLiant DL385 Gen11 2SFF Tri-Mode U.3 x4 BC Front/Tertiary Drive Cage Kit · P55091-B21

Name: HPE ProLiant DL385 Gen11 2SFF Tri-Mode U.3 x4 BC Front/Tertiary Drive Cage Kit · P55091-B21
Brand: HPE
SKU: P55091-B21

P/N: P55091-B21

HPE ProLiant DL385 Gen11Server backplane

Server backplane with exact ordering SKU P55091-B21. Validate HPE configuration, prerequisites and shipment contents before ordering.

01 / Specifications

MPN / P/N: P55091-B21
Documented ordering description: HPE ProLiant DL385 Gen11 2SFF Tri-Mode U.3 x4 BC Front/Tertiary Drive Cage Kit
Documented platform: HPE ProLiant DL385 Gen11
Drive bay topology in title: 2SFF Tri-Mode U.3 x4
Protocol designation in title: U.3
Selection qualification: Requires a Tri-Mode controller; this cage does not support Direct Attach. Cage/backplane bay count does not imply included drives. Verify CTO, front/mid/rear position, U.3 x1/x4, SAS/SATA/NVMe, controller and exact cables. Some cages require a Tri-Mode controller and forbid Direct Attach. An ordering SKU documented in HPE QuickSpecs, not a stock or universal-compatibility claim. Verify exact SKU, host, revision, power, cooling, cabling and shipment contents before ordering.

Specification source: HPE ↗
Checked against documentation: 20.10.2026