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Silver 3.5 inch internal hard drive with green circuit board visible on underside

Seagate

Seagate Exos X20 ST20000NM007DProduct 20TB 7200 RPM SATA 6.0Gb/s 256MB 3.5" internal hard drive

SKU CH-B649-EZZDM MPN ST20000NM007DProduct

A 20 TB enterprise hard drive with 7200 RPM, 256 MB cache and SATA 6.0 Gb/s interface for high-capacity storage systems

  • InterfaceSATA 6.0Gb/s
  • Capacity20TB
  • Flash Memory CapacityHard Drive
  • NAND Flash Memory TypeSLC
  • Recording TechnologyCMR
  • RPM7200 RPM

Options 20TB Exos X20

Struck-through versions exist but are not stocked here.

  • 20TB capacity stores massive datasets in a single 3.5" drive
  • 7200 RPM spindle speed delivers fast sequential throughput for heavy workloads
  • 256MB cache buffers bursts to sustain consistent performance
  • 5M-hour MTBF rating supports continuous operation in enterprise arrays
  • SATA 6.0Gb/s interface integrates directly into existing storage infrastructure

Capacity and interface

The Seagate Exos X20 ST20000NM007D is a 20TB 3.5-inch internal hard drive with a SATA 6.0Gb/s interface and 7200 RPM spindle speed. It uses conventional magnetic recording and a 256MB cache to deliver high sequential throughput for enterprise storage arrays and hyperscale applications. The 512e/4Kn format supports modern operating systems and legacy controllers alike.

System compatibility

Verify that your host has a free 3.5-inch drive bay and a SATA 6.0Gb/s port capable of 600 MB/s transfer rates. The drive measures 147mm long, 101.85mm wide and 26.10mm high, so confirm physical clearance in compact chassis. A SATA power connector is required; the unit is hot-pluggable for supported backplanes.

Upgrade path

This model replaces lower-capacity 3.5-inch enterprise drives where rack density and cost per terabyte are primary concerns. The jump is worthwhile when workloads demand 2.5M-hour MTBF reliability, sustained random performance of 168000 read and 550000 write IOPS, and the lowest total cost of ownership for massive scale-out deployments.

Highlights

  • 20TB capacity stores massive datasets in a single 3.5" drive
  • 7200 RPM spindle speed delivers fast sequential throughput for heavy workloads
  • 256MB cache buffers bursts to sustain consistent performance
  • 5M-hour MTBF rating supports continuous operation in enterprise arrays
  • SATA 6.0Gb/s interface integrates directly into existing storage infrastructure

Specifications

BrandSeagate
SeriesX20
ModelST20000NM007D
InterfaceSATA 6.0Gb/s
Capacity20TB
Flash Memory CapacityHard Drive
NAND Flash Memory TypeSLC
Recording TechnologyCMR
RPM7200 RPM
Cache256MB
Average Latency4.16 ms
FeaturesMarket-leading 20TB HDD offering the highest capacity available for more petabytes per rack*
Highly reliable performance with enhanced caching, making it the logical choice for cloud data center and massive scale-out data center applications
Hyperscale SATA model tuned for large data transfers and low latency
PowerBalance feature optimizes Watts/TB
Maximize total cost of ownership savings through lower power and weight with helium sealed-drive design
Proven helium side-sealing weld technology for added handling robustness and leak protection
Digital environmental sensors to monitor i
UsageFor Enterprise Storage
Form Factor3.5"
Height (maximum)26.10mm
Width (maximum)101.85mm
Length (maximum)147mm

Other versions of this model

1 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Does the Seagate Exos X20 ST20000NM007D include mounting screws or a SATA cable, or must they be purchased separately?

The drive is supplied as a bare 3.5" unit; mounting screws and a SATA data cable are not included and must be sourced separately.

Should I choose the 512e or 4Kn disk format for a modern server running a recent Linux kernel?

The drive supports both 512e and 4Kn; 4Kn is preferred on modern Linux kernels for full 4 KB sector efficiency, while 512e maintains compatibility with older systems.

What sustained throughput can I expect from the 7200 RPM SATA 6.0Gb/s interface once the drive is installed in a RAID array?

The SATA 6.0Gb/s link caps at 600 MB/s; real-world sustained transfer rates will be lower and depend on workload, but the interface itself does not exceed 600 MB/s.

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