IBM 8-Bay 2.5-Inch SFF SAS/SATA Hot-Swap Backplane for System x3500 M4 / x3650 M4 (46W9187) is an OEM server storage backplane designed to support up to eight 2.5-inch Small Form Factor (SFF) hot-swap drives. It provides the electrical and mechanical interface between the installed drives and the server's storage controller, with two SFF-8087 Mini-SAS connections. IBM documentation identifies 46W9187 as the 8 × 2.5-inch hard disk drive backplane for the System x3500 M4 and x3650 M4.
- Part Number: 46W9187
- Manufacturer: IBM / Lenovo
- Product Type: Server Storage Backplane
- Drive Bays: 8 Bays
- Drive Form Factor: 2.5-inch SFF
- Supported Drives: SAS / SATA HDDs and SSDs
- Drive Configuration: 8 × 2.5-inch Hot-Swap Drives
- Interface: SAS / SATA
- Connector Type: 2 × SFF-8087 Mini-SAS
- Hot-Swap: Yes
- Application: Enterprise Server Storage / Drive Connectivity
- Compatible Systems: IBM System x3500 M4 and System x3650 M4; also listed for System x3750 M4 configurations
- Related Part Numbers: 94Y7751, 90Y4268, 46C9089
- Function: Provides drive connectivity between the 8-bay SFF drive cage and SAS/SATA storage controller
- Condition: OEM Replacement Part
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