We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Silver 3.5 inch SAS hard drive with exposed circuit board

Seagate

Seagate EXOS ST4000NM0125 4TB 7.2K 12Gb/s SAS 3.5" 128MB internal hard drive

SKU CH-7426-41YGB MPN ST4000NM0125

4 TB 3.5-inch SAS hard drive with 12 Gb/s interface, 7.2 K RPM and 128 MB cache for server storage

  • Total capacity4 TB
  • 4TB capacity stores large enterprise datasets
  • 12Gb/s SAS interface moves data quickly
  • 2K RPM spindle speed delivers consistent throughput
  • 128MB cache accelerates frequent read operations
  • 5-inch form factor fits standard server bays

Seagate EXOS 4TB SAS enterprise drive

This Seagate EXOS ST4000NM0125 is a 4TB internal hard drive built for server and storage-array workloads. It spins at 7.2K RPM and connects through a 12Gb/s SAS interface with a 128 MB cache. The 3.5 inch form factor fits standard enterprise drive bays and the drive is supplied new.

Suited for multi-drive arrays.

The SAS interface and server-class firmware target RAID, JBOD and backup appliances that can address dual-port SAS signalling. Systems without a SAS host bus adapter, RAID controller or expander cannot use this drive. Buyers who need a simple plug-and-play desktop storage drive should look elsewhere.

12Gb/s SAS interface dictates host compatibility

The single specification that decides fitment is the 12Gb/s SAS interface; the host must provide a native SAS connection or compatible controller. Without that interface the drive will not be recognised or able to transfer data.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $86.99
Cheaper than about 57% of the 4,938 comparable items (median $107.99).
Total capacity 4 TB
Higher than about 70% of the 2,372 comparable items (median 2 TB).
Price per TB $21.75 per TB
Cheaper than about 91% of the 2,365 comparable items (median $62.21 per TB).

New to this? Paying with USDT: TRC-20 or ERC-20 — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameSeagate
Product lineEXOS
Model nameST4000NM0125
Part numberST4000NM0125
Total capacity4 TB

Questions about this item

Which capacity should I choose for a server build?

This model provides 4TB of storage in a single 3.5-inch drive, suited for enterprise arrays.

What does the 7.2K speed mean for actual throughput?

The 7.2K spindle delivers consistent sequential performance for bulk storage workloads.

How does the 12Gb/s SAS interface limit real-world transfer rates?

The 12Gb/s SAS link caps the maximum interface bandwidth at 12Gb/s.

More in 3.5-Inch Internal Desktop HDDs

Similar items