IBM 8721-HC1 Flex System Enterprise Chassis (Populated, Single Unit): This is one populated 10U Flex System chassis sold as a working bundle. The enclosure ships with eight half-wide x240 (machine type 8737, model Z58) compute nodes installed alongside one CMM1, six 2,500W power supplies, and ten fan modules. Memory and storage modules from the original deployment are included as listed in the specifications below. This is NOT a bare chassis listing — it is a single, integrated, refurbished system tested in working order.
Engineering Context
The 8721-HC1 enclosure uses a passive midplane to deliver up to 15,000W of raw PSU capacity to fourteen node bays plus four I/O switch slots. The half-wide x240 nodes (8737-Z58) are E5-2400 series two-socket Xeon platforms supporting 10 Gb Ethernet, 16 Gb Fibre Channel, and FDR InfiniBand mezzanine adapters; the eight units in this listing populate part of the chassis, leaving six bays open for expansion. CMM1 manages chassis-wide power capping, fan curves, and node-level service processors over a single management Ethernet drop.
Deployment & Use Cases
Drop-in replacement for an end-of-life Flex System rack, ready for switch and OS provisioning.
Lab and education environments needing eight blade hosts under one CMM domain.
Cold-standby or migration target for shops still running E5-2400-era VMware/Hyper-V workloads.
Recovery platform for IBM/Lenovo Flex deployments where in-place repair is no longer cost-effective.
Technical Specifications
OEM Brand: IBM
Chassis Machine Type: 8721-HC1, 10U
Compute Node Bays: 14 half-wide; 8 populated, 6 empty
Installed Compute Nodes: 8 × x240 (8737 model Z58)
Power Supplies: 6 × 2,500W hot-swap
Cooling: 8 × 80mm fan modules + 2 × 40mm fan modules
Management: 1 × Chassis Management Module (CMM1)
Memory Modules Included: 16 × IBM 47J0172 4GB and 54 × IBM 47J0169 8GB DDR3 RDIMM
Hard Drives Included: 9 × Seagate 300GB SAS, 4 × ST9500620NS 500GB, 1 × IBM 81Y3829 1TB
I/O Bay Slots: 4 (rear, switch modules NOT included)
Network Management: Fully managed via CMM
Condition: Refurbished, tested working order, minor cosmetic wear
Compatibility & Constraints
Compatible with IBM and Lenovo Flex System half-wide and full-wide nodes for adding capacity to the six empty bays, plus supported Flex System Ethernet, Fibre Channel, and InfiniBand switch modules.
NOT compatible with IBM BladeCenter blades (HS22, HS23, etc.) — incompatible midplane. The listing does NOT include I/O switch modules, OS licenses, or rack-mount rails unless visibly shown. CPU SKUs and exact memory population per node are as installed and as photographed; T.E.S does not warrant a specific CPU step beyond the Xeon E5-2400 family.
Why T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS supplies refurbished IBM Flex System builds tested at chassis and node level before dispatch, with a 1–3 day handling window. Visit https://www.tes-itsolutions.com for the full inventory of IBM, Lenovo, NVIDIA Mellanox, and HPE refurbished infrastructure.