Home › Parts › Lenovo part numbers

4XB7A74955: Lenovo ThinkSystem DE Series 3.84TB 1DWPD 2.5" SAS SSD 2U24

LenovoSSDsSAS 12Gb/s dual-port

Also listed as: 4XB7A74955-01, 02JK854, SP47A74955, BKZ0 · made by Kioxia

The Lenovo 4XB7A74955 is an enterprise 3.84TB 12Gb/s dual-port SAS solid-state drive built for ThinkSystem DE Series 2U24 storage arrays (DE2000H, DE4000H, and DE4200H) and DE240S expansion shelves. It utilizes enterprise-grade 3D NAND with dual-port SAS failover pathways, delivering robust data protection and predictable throughput for mixed virtualized workloads, flash caching tiers, and high-IOPS database volumes. In the broker and second-hand marketplace, it is a high-demand component used to upgrade DE arrays. Buyers must ensure the drive carries Lenovo SANtricity storage firmware and includes the specialized DE-series drive sled with integrated status LEDs.

Buy 4XB7A74955Sell yours

Specifications

Part number4XB7A74955
BrandLenovo
Made byKioxia
TypeSSDs
Other numbers4XB7A74955-01, 02JK854, SP47A74955, BKZ0
Statuscurrent
Capacity (GB)3,840
InterfaceSAS 12Gb/s dual-port
Form factorSFF 2.5in, DE Series 2U24 Carrier
Endurance1 DWPD, Read Intensive
Generation fitThinkSystem DE Series SAS hybrid arrays (DE2000H, DE4000H, DE4200H)

About the 4XB7A74955

4XB7A74955 is a high-performance 1.92TB read-intensive PCIe 4.0 x4 NVMe solid state drive in a 2.5-inch U.3 form factor for ThinkSystem V2 and V3 servers, powered by Samsung PM9A3 technology. Rated at 1 DWPD, it delivers up to 6,800 MB/s sequential read and 850,000 IOPS random read performance. Within Lenovo's flash portfolio, it represents the modern PCIe Gen4 standard, delivering more than ten times the bandwidth of legacy SATA SSDs for real-time analytics, machine learning caches, and dense VM datastores.

Compatibility

The drive fits small-form-factor drive bays cabled for NVMe, either through a tri-mode RAID adapter (such as RAID 940) or directly to the motherboard via SlimSAS/MCIO PCIe cables. It is supported in ThinkSystem SR650 V2, SR650 V3, SR630 V2, SR630 V3, and SR665 V3. It does not work in bays wired only for SAS/SATA, even though the physical U.3 connector will mate. It does not fit legacy ThinkSystem V1 servers lacking U.3 universal backplane wiring.

How to identify a genuine unit

The unit features a Lenovo hot-swap caddy with an orange NVMe icon and a label displaying option number 4XB7A74955, FRU part number 02JK008 or SP47A74955, and feature code BKSV. The physical SSD is a Samsung PM9A3 with model MZQL21T9HCJR-00ALV. Lenovo XClarity Controller and nvme-cli detect the drive with Lenovo firmware prefix LDx and verify genuine NVMe device authorization.

Buying used

Check remaining wear percentage using nvme smart-log, inspecting available spare blocks and percentage used counters. Confirm that the drive does not have OEM firmware locks from other vendors like Dell or HPE, which can prevent Lenovo XCC from managing the drive. Inspect the U.3 connector blades for physical damage or bent pins. Make sure the ThinkSystem U.3 hot-swap caddy is included.

Reference prices (last 14 days, updated 2026-10-27)

New: USD 2,450 (1 sighting, Oct 2026)

Used: USD 890 (1 sighting, Oct 2026)

All sightings
SellerConditionPriceNoteSeen
cdw.comnewUSD 2,450New original Lenovo sealed part2026-10-27
ebay.comusedUSD 890Clean pull tested with 99% health remaining, includes 2U24 sled2026-10-27

Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.

Fits these models

FAQ

Which arrays support part number 4XB7A74955?

It supports Lenovo ThinkSystem DE2000H, DE4000H, DE4200H 2U24 controller enclosures and DE240S 2U24 expansion shelves.

Does 4XB7A74955 support dual-port SAS?

Yes, it provides dual-port 12Gb/s SAS paths for active-active multi-controller failover.

Buying or selling 4XB7A74955?

New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.

Buy 4XB7A74955Sell yours

Sources