Lenovo 4Y37A97937 · RAID 9450-16i

MPN / P/N

4Y37A97937

Reference-part status

Reference part: the code is listed under Legacy/EOL or Withdrawn documentation. For installed-equipment replacement research; confirm exact current lifecycle and availability.

Manufacturer model

RAID 9450-16i

Adapter type

RAID controller

Internal or External ports

Internal

Feature code

C8B9, C6UK

Form factor

PCIe low profile

Controller chip

Microchip Excalibur SmartROC 3200

Vendor equivalent

SmartRAID 3258-16i

Host interface

PCIe 4.0 x8

Port interface

24 Gb SAS

Number of ports

16

Port connectors

Two x8 SFF-8654

Drive interface

SAS, SATA (U.2 NVMe planned)

Drive type

HDD, SSD, SED

Hot-swap drives

Yes

Max physical drives

16

Max physical drives (with expander)

238

Max logical drives

64

RAID levels

0, 1, 10, 5, 50, 6, 60, 1 Triple, 10 Triple

JBOD mode

Yes

Cache

8GB (Standard)

Cache protection with Flash and Supercap

Yes

Performance Accelerator (FastPath)

No

SSD Caching (CacheCade Pro 2.0)

No

SED support (see Note 2)

Yes

Remote management - Controller FW update (XCC/BMC) (see Note 5)

Yes

Remote management - Inventory (XCC/BMC) (see Note 5)

Yes

Remote management - RAID setup (XCC/BMC) (see Note 5)

Yes

Manufacturer lifecycle

Withdrawn (live Lenovo Press reference, checked 2026-10-19)

Manufacturer withdrawal date

2025-11-30

Documented selection limits

Use only the approved ThinkSystem server, slot/riser, backplane and correct cable/firmware configuration. Port count, direct physical-drive limit and expander-qualified drive limit are separate source fields. HBA passthrough is not hardware RAID. Flash/supercap support does not imply an optional module is supplied; consult the exact option guide. NVMe U.3 Tri-Mode x1 and NVMe-only U.2 x4 configurations are different and not simultaneous universal support; feature codes/CH5Z enablement and host cabling must be verified for RAID 940. Planned U.2 support stays planned, not a delivered feature. SED support on HBAs is host-software pass-through, not a bundled encryption/key-management service. Remote management exclusions and blade drive-count limits in sourceQualifications apply. Withdrawn hardware is recorded for installed-equipment reference/replacement, not current production or stock availability.

Manufacturer qualifications — required for selection

Note 1: RAID 730-8i 1GB is available world-wide except USA and Canada Note 2: SAS HBAs support SEDs by host software passing SED commands through the HBA to the drives. Note 3: SN550 blade 4i adapters are limited to two drives and RAID 0/1; SN850 has four drives and applicable RAID modes depend on the exact adapter. Note 5: SR635/SR655/SR645/SR665 with second-generation AMD EPYC (Rome) processors do not support remote management.

Specification source: Lenovo ↗
Checked against documentation: 19.10.2026