ST18000NM000J: Seagate Exos X18 18TB 7200 RPM SATA 6Gb/s 512e/4Kn 3.5-Inch Enterprise Hard Drive
Also listed as: 2TV103-002, Exos X18 18TB SATA, 2TV103-001 · made by Seagate
The Seagate Exos X18 18TB (model ST18000NM000J) is an 18TB enterprise helium hard drive engineered for hyper-scale cloud architectures and massive object storage clusters. Delivering sustained transfer speeds up to 270 MB/s, it features Seagate Secure hardware encryption and PowerChoice idle power optimization. Secondary market buyers should verify that power disable pin 3 behaves properly with legacy SATA power cables, inspect SMART error counters, and confirm that warranty status is recognized by SeaTools.
Specifications
| Part number | ST18000NM000J |
|---|---|
| Brand | Seagate |
| Made by | Seagate |
| Type | Hard drives |
| Other numbers | 2TV103-002, Exos X18 18TB SATA, 2TV103-001 |
| Status | current |
| Capacity (GB) | 18,000 |
| Interface | SATA 6Gb/s |
| Form factor | LFF 3.5in |
| Speed | 7200 rpm |
| Cache (GB) | 0.256 |
| Generation fit | Universal 3.5-inch enterprise server and storage drive bays |
About the ST18000NM000J
ST18000NM000J is Seagate's 18TB 7200 RPM SATA 6Gb/s enterprise hard drive in the Exos X18 series. Featuring a 9-disk helium platform with Conventional Magnetic Recording (CMR), it delivers sustained sequential speeds up to 270 MB/s for hyper-scale cloud architectures, massive object storage clusters, and enterprise backup targets. It represents the flagship capacity point of the Exos X18 product generation.
Compatibility
Compatible with 3.5-inch enterprise server drive bays and multi-bay JBOD storage shelves. Connects to native SATA 6Gb/s ports or SAS/SATA RAID controllers. It does not fit 2.5-inch drive cages. Verify that server backplane power connectors comply with SATA revision 3.3 power disable pin specifications to avoid drive spin-up issues.
How to identify a genuine unit
The top label displays Seagate Exos X18 branding, model ST18000NM000J, part number 2TV103-002, and 18TB capacity notation with SATA 6Gb/s interface marking. In Linux dmesg, smartctl, and lsscsi, the drive identifies as ST18000NM000J with standard Seagate factory firmware and FastFormat support.
Buying used
Check SMART attributes for reallocated sector counts, power-on hours, and helium integrity flags. Pulled drives from cloud storage nodes often carry clean SMART tables and provide substantial cost savings over new retail drives. Check that the metal top cover is free of dents.
Reference prices (last 14 days, updated 2026-10-27)
New: USD 305 (1 sighting, Oct 2026)
Used: USD 190 (1 sighting, Oct 2026)
All sightings
| Seller | Condition | Price | Note | Seen |
|---|---|---|---|---|
| serversupply.com | new | USD 305 | 2026-10-27 | |
| ebay.com | used | USD 190 | 2026-10-27 |
Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.
Fits these models
Equivalent part numbers
- Dell 400-BKSY Dell 18TB 7.2K SATA 3.5in Exos X18 HDD
FAQ
What interface does the Exos X18 feature?
SATA 6Gb/s interface with support for FastFormat 512e/4Kn sector sizing.
What is the sustained transfer rate?
Up to 270 MB/s sustained sequential read/write speed.
Buying or selling ST18000NM000J?
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.
Sources
- Seagate Exos X18 Product Manual, checked 2026-10-27