Your SR650 V4 front bays are empty because the BP2 backplane cables are missing, damaged, or were never included in your build. You need the exact SAS/SATA kit for a 2.5-inch chassis, not a 3.5-inch variant that won't seat properly. This kit connects your front drives to the BP2 backplane with the correct pinout and cable length for the SR650 V4 internal layout. Drop it in, connect both ends, and your drive bays go live
| brand | Lenovo ISG |
| category | Servers |
| subcategory | Lenovo Backplanes |
| compatible_server | ThinkSystem SR650 V4 |
| drive_size | 2.5 inch |
| backplane_type | BP2 (Front) |
| interface | SAS / SATA |
| manufacturer_part_context | Cable Kit |