Technical Snapshot

The WD Red Pro 20TB SATA is a NAS-optimized 3.5" hard disk drive designed for multi-bay NAS and RAID environments. Spinning at 7,200 RPM with a 512 MB cache buffer, it delivers sustained transfer rates up to 245 MB/s over a SATA 6Gb/s interface. The drive is rated for 550 TB/year workload with a 2,500,000 hours MTBF, backed by WD's storage reliability engineering. With 20TB of raw storage capacity, it is optimized for multi-bay NAS systems with always-on operation and vibration tolerance. Part of the WD Red Pro product line.

Use Case
Multi-bay NAS, RAID arrays, always-on storage
Compatibility
Standard 3.5" drive bay, SATA 6Gb/s interface
Category
NAS Hard Disk Drive — WD Red Pro
WD RED PRO Image not available
WD HDD
WD Red Pro

Red Pro 20TB SATA

SATA 6Gb/s · 3.5" · 7,200 RPM · 512 MB · 20TB

Total raw storage capacity of the drive.
Capacity 20TB
Rotational speed of the disk platters. Higher RPM provides faster sequential and random I/O performance.
RPM 7,200
On-drive DRAM buffer for caching frequently accessed data and optimizing read/write operations.
Cache 512 MB
Annual workload rating. Enterprise drives support sustained 24/7 heavy use in server and NAS environments.
Workload 550 TB/year
MPNWD201KFGX
EAN718037894164
CategoryHard Disk Drives
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Drive Specifications

Form Factor3.5"
InterfaceSATA 6Gb/s
RPM7,200 RPM
Cache512 MB
Sustained Transfer Rate245 MB/s
Workload Rating550 TB/year
MTBF2,500,000 hours
Power (Idle)5.3W
Power (Operating)8.8W

Full Specifications

Data sourced from WD product specifications
Drive
SeriesRed Pro
Capacity20TB
Form Factor3.5"
InterfaceSATA 6Gb/s
RPM7,200 RPM
Cache512 MB
Performance
Sustained Transfer Rate245 MB/s
Workload Rating550 TB/year
Reliability
MTBF2,500,000 hours
Power (Idle)5.3W
Power (Operating)8.8W
Product
BrandWD
SegmentNAS
MPNWD201KFGX
EAN718037894164
Physical
Package Dimensions15.0 x 11.0 x 3.0 cm

Support & Downloads

WD Red Pro 20TB SATA Firmware UpdateLatest firmware · Check WD support
WD Support →
WD Red Pro 20TB SATA DatasheetPDF · Technical specifications
WD Support →
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Frequently Asked Questions

Is the Red Pro 20TB SATA compatible with my NAS?

Yes, the WD Red Pro 20TB SATA uses a standard SATA 6Gb/s interface and 3.5" form factor, compatible with any NAS that accepts 3.5" SATA drives. It is widely supported by Synology, QNAP, TrueNAS, and Unraid systems. The 550 TB/year workload rating makes it suitable for always-on NAS environments.

Can I use the Red Pro 20TB SATA in a RAID array?

Yes. The WD Red Pro 20TB SATA is designed for RAID deployments. Its 550 TB/year workload rating and 2,500,000 hours MTBF ensure reliability in RAID 5, RAID 6, RAID 10, and ZFS configurations. Enterprise and NAS drives include error recovery features (TLER/ERC) for RAID controller compatibility.

What does the 550 TB/year workload rating mean?

The workload rating indicates the maximum annual data transfer the drive supports while maintaining stated reliability. 550 TB/year means the drive supports approximately 1.5 TB of data transfer per day, suitable for always-on NAS and backup workloads.

How fast is the Red Pro 20TB SATA?

The WD Red Pro 20TB SATA spins at 7,200 RPM with a 512 MB cache buffer, delivering sustained transfer rates up to 245 MB/s. This is optimal for sequential workloads like large file transfers and backup operations.

How much power does the Red Pro 20TB SATA consume?

The WD Red Pro 20TB SATA draws 8.8W under operating load and 5.3W at idle. For multi-drive configurations, factor these values into your power budget — a 12-drive array would consume approximately 106W under load.

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