Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5"

Feature

Specification

Manufacturer

Seagate Technology

Part Number / Model

ST20000NT001 (IronWolf Pro)

Capacity

20 TB

Form Factor

3.5″ internal HDD

Interface

SATA III (6 Gb/s) / SATA‑600

Spindle Speed

7,200 RPM

Cache / Buffer

256 MB DRAM

Recording Technology

Conventional Magnetic Recording (CMR), 512e format

Sustained Transfer Rate

Up to ~285 MB/s

Workload Rating

Up to 550 TB/year (24×7 workloads)

Feature Set

AgileArray, RV sensors, TLER, IronWolf Health Management, Rescue recovery

MTBF

2.5 million hours

Supported Systems

Server, Workstation, Multi‑bay NAS systems

Warranty

5‑year limited warranty (includes 3 years Rescue Data Recovery)

Physical Dimensions

~146.99 × 101.85 × 26.11 mm; weight ~670 g (1.48 lb)