Lenovo 4XF7A79787 ST650 V2 4-Bay 3.5-Inch HDD Cage
Overview
The Lenovo 4XF7A79787 is a four-bay, 3.5-inch hard drive cage designed specifically for the ThinkSystem ST650 V2 tower server. If you're expanding local storage capacity in an ST650 V2 and need additional drive bays beyond the base configuration, this cage is the purpose-built path — no improvised mounting, no clearance guesswork. It installs into the 3.5-inch chassis bay section of the ST650 V2 enclosure and brings four additional large-form-factor drive positions online.
The cage weighs 2.00 lb, consistent with a sheet-metal backplane-and-cage assembly sized for 3.5-inch enterprise HDDs. At that weight it handles comfortably during a single-technician installation without needing a second set of hands to steady it.
Compatibility and Integration
This cage is specific to the ThinkSystem ST650 V2 platform. The "3.5 Chassis" designation in the part name indicates it is matched to the 3.5-inch drive bay area of that enclosure — not the 2.5-inch SFF section. Before ordering, confirm your ST650 V2 chassis variant supports an additional HDD cage in the target bay location; Lenovo server configurators and the ST650 V2 maintenance manual identify which cage slots are populated in the base build versus available for expansion. Installing a mismatched cage in an ST650 V2 with a different base drive count could create a backplane connector conflict, so verify the expansion bay is physically vacant before procurement.
For organizations building out a network video recorder backend on tower hardware, or expanding storage for a IP camera archive server running on ST650 V2 infrastructure, this cage provides the additional drive slots needed to scale raw capacity without replacing the server. Pair it with compatible 3.5-inch SATA or SAS HDDs qualified on the ST650 V2 compatibility list for a supported configuration.
Frequently Asked Questions
Q: Which server platform is the 4XF7A79787 compatible with?
A: The 4XF7A79787 is designed for the Lenovo ThinkSystem ST650 V2 tower server. It is not a universal cage and should not be assumed compatible with other ThinkSystem models without confirming against Lenovo's parts compatibility documentation.
Q: Does this cage come with drives included?
A: No. The 4XF7A79787 is a drive cage and chassis hardware kit only. Hard drives are purchased separately and must be selected from Lenovo's ST650 V2 qualified drive list.
Q: Is the 4XF7A79787 a tool-less installation?
A: Installation tooling requirements are not specified in the available evidence. Consult the ST650 V2 hardware maintenance guide for cage installation procedures before procurement if tool-less access is a requirement for your environment.
Q: How many drive bays does this cage add?
A: The 4XF7A79787 adds four 3.5-inch drive bays to the ST650 V2 chassis.
