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The Lenovo 7C57A03998 is an 8-bay 2.5-inch drive backplane kit designed specifically for ThinkSystem SR850 and SR860 rack servers. If you are expanding internal storage capacity in either of these platforms — whether adding drives to a previously unpopulated bay zone or replacing a failed backplane assembly — this kit provides the physical interface layer between your SAS or SATA drives and the server's storage controller. Supporting both SAS and SATA drive protocols, the 7C57A03998 gives you flexibility to mix enterprise SAS spindles, SAS SSDs, or SATA SSDs within the same backplane zone without requiring a separate assembly for each drive type.
This backplane kit is designed for the Lenovo ThinkSystem SR850 and SR860 server platforms exclusively. It accepts 2.5-inch form-factor drives with SAS or SATA interfaces. Before ordering, confirm the target bay zone in your SR850 or SR860 chassis — Lenovo's dense 2-socket and 4-socket configurations use multiple distinct backplane assemblies covering different bay ranges, and installing the wrong assembly in the wrong zone will result in a non-functional fit. Cross-reference your server's hardware maintenance manual or the Lenovo ServerProven compatibility tool using your system's machine type and model to verify this is the correct backplane for your specific bay position. The kit weighs 1.70 lb and measures 6.80 × 7.50 × 5.80 inches, consistent with a mid-density 2.5-inch SAS/SATA assembly for this server class.
Installation requires partial disassembly of the SR850 or SR860 chassis to access the drive cage. Refer to the ThinkSystem SR850 or SR860 hardware maintenance manual for the specific backplane replacement procedure, including any required cable routing for the SAS/SATA signal cables and power connectors. Ensure the server is powered down and discharged before handling internal components. Country of origin is Mexico.
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Metal backplane kit designed to support eight 2.5-inch drives within a Lenovo ThinkSystem SR650 server
Factory-new 8-bay 2.5-inch backplane kit for Lenovo ThinkSystem SR530 and SR630 rack servers
N 8-bay SAS/SATA backplane kit designed to expand storage connectivity within specific Lenovo ThinkSystem servers
2.5-inch AnyBay 8-bay backplane kit designed to expand or restore drive connectivity in ThinkSystem SR850 and SR860 rack servers
N 8-bay, 2.5-inch Anybay backplane kit designed for the ThinkSystem ST550 tower server
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