Lenovo 4TA7A84579 · G5 NVMe Retimer

MPN / P/N

4TA7A84579

Manufacturer model

G5 NVMe Retimer

Adapter type

NVMe retimer

Internal or External ports

Internal

Feature code

BLKY

Form factor

PCIe low profile

Controller chip

Astera PT5161L

Vendor equivalent

None

Host interface

PCIe 5.0 x16

Port interface

PCIe NVMe

Number of ports

4

Port connectors

Two x8 SFF-8654 MCIO

Drive interface

NVMe

Drive type

SSD

Hot-swap drives

Yes

Max physical drives

4

RAID levels

None

JBOD mode

Yes

Cache

None

Cache protection with Flash and Supercap

No

Performance Accelerator (FastPath)

No

SSD Caching (CacheCade Pro 2.0)

No

SED support (see Note 2)

No

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

Yes

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.

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