Home › Parts › Lenovo part numbers

4XB7A74951: lenovo ThinkSystem DE Series 18TB 7.2K 3.5" SAS HDD

lenovoHard drivesSAS 12Gb/s

Also listed as: 4XB7A74951-01, 02JK850, SP47A74951, BKYY, ST18000NM003J

18TB high-capacity 3.5-inch 7,200 RPM SAS hard drive module with SANtricity firmware for Lenovo ThinkSystem DE Series SAN arrays.

Buy 4XB7A74951Sell yours

Specifications

Part number4XB7A74951
Brandlenovo
TypeHard drives
Other numbers4XB7A74951-01, 02JK850, SP47A74951, BKYY, ST18000NM003J
Capacity (GB)18,000
Form factor3.5" DE Storage Tray
InterfaceSAS 12Gb/s
Rotational speed rpm7,200
EncryptionNon-SED

About the 4XB7A74951

The Lenovo 4XB7A74951 is an 18TB 3.5-inch 7,200 RPM helium-sealed enterprise SAS hard drive module engineered for Lenovo ThinkSystem DE Series SAN storage systems. Sourced from high-reliability platforms including Seagate Exos X18 with custom SANtricity firmware, it provides maximum high-density rotational capacity for DE2000H, DE4000H, and DE6400H arrays configured for backup, disaster recovery, and video archival.

Compatibility

Compatible with Lenovo ThinkSystem DE2000H, DE4000H, DE4200H, DE6400H, DE6600H arrays, and DE120S 12-drive expansion enclosures. Requires SANtricity OS 11.70 or newer to recognize 18TB drive geometries. It is incompatible with standard ThinkSystem SR/ST servers and cannot be used in NetApp FAS/AFF ONTAP systems without re-flashing.

How to identify a genuine unit

The drive is housed in a ThinkSystem DE Series 3.5-inch hot-swap drive canister. The front carrier displays an 18TB capacity label, and the top drive label lists Lenovo option part number 4XB7A74951, FRU code 02JK850, and feature code BKYY. In SANtricity System Manager, it identifies with certified Lenovo DE microcode.

Buying used

When purchasing used 18TB DE Series drives, verify that the front tray latch and rear SAS connector interface are intact and unbent. Check helium integrity and SMART logs in SANtricity to confirm that the drive reports zero media errors. Ensure the drive possesses genuine Lenovo DE firmware rather than third-party or generic SAS microcode.

Reference prices (last 12 months, updated 2026-10-18)

Refurbished: USD 310 (1 sighting, Oct 2026)

Used: USD 260 (1 sighting, Oct 2026)

All sightings
SellerConditionPriceNoteSeen
eBayusedUSD 260eBay sold listing2026-10-18
IT CreationsrefurbishedUSD 310Tested clean working pull in DE series canister2026-10-01

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

Fits these models

Buying or selling 4XB7A74951?

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 4XB7A74951Sell yours

Sources