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WD

Ultrastar DC 20TB Renewed

WUH722020BLE6L4
Ultrastar DCnearlineePMR20TBSATA-6G3.5"
$16.40/TB
$327.99
REFURBIn Stock
Updated Mar 22, 2026, 02:28 PM
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Quick Verdict

The WD Ultrastar DC 20TB Renewed is a 20TB SATA-6G enterprise drive at $16.40/TB - CMR recording makes it safe for all RAID levels and NAS deployments. As a refurbished unit, run SMART diagnostics on arrival and verify power-on hours.

Specifications

Capacity20TB
Form Factor3.5"
InterfaceSATA-6G
Recording TechePMR
RPM7200
Cache512MB
Sector Size512e
Workload Rating550TB/yr
Warranty5 years
ASINB0FM12ZL28

90-Day Price History

$15$17$1803/2305/0506/17
How it compares - 20TB SATA-6G
#1WD Ultrastar DC 20TB RenewedTHIS DRIVE
$16.40/TB
#2WD Ultrastar DC HC570 20TB SATA
$23.50/TB
#3Synology HAT5300 20TB NAS Enterprise
$36.36/TB
#4Synology HAT5300 20TB NAS Enterprise
$42.28/TB
#5MDD 20TB SATA 7200RPM NAS
$—/TB

Compare to similar 20TB SATA-6G drives

WD
Ultrastar DC HC570 20TB SATA
$23.50/TB
$469.99
new
Synology
HAT5300 20TB NAS Enterprise
$36.36/TB
$727.28
REFURB
Synology
HAT5300 20TB NAS Enterprise
$42.28/TB
$845.68
new
MDD
20TB SATA 7200RPM NAS
$—/TB
$—
MDD
20TB SATA 7200RPM NAS
$—/TB
$—

Frequently Asked Questions

Yes. The Ultrastar DC 20TB Renewed uses ePMR recording which is fully compatible with all RAID levels. It is rated for 550TB/year workload.

5-year manufacturer warranty. This listing is a refurbished/renewed unit - verify seller warranty before purchase.

Compatible with any server, NAS or workstation with a SATA port. Works in Synology, QNAP, TrueNAS, UnRAID and all major NAS platforms.

Use Case Scenarios

🏠
Home & SMB NAS
Building a high-capacity NAS for media, backups and file sharing.
✓ Excellent fit
CMR recording is RAID-safe and fully compatible with Synology, QNAP, TrueNAS and UnRAID. Refurb units offer strong value for non-critical NAS.
💾
Backup Server / Veeam Target
Dedicated backup storage for Veeam, Commvault, or NetBackup.
✓ Excellent fit
20TB SATA drives are ideal for backup targets. SATA gives maximum $/TB for backup repositories.
☁️
Object Storage / Cold Data Tier
High-density storage for MinIO, Ceph or Hadoop at scale.
✓ Excellent fit
At 20TB per drive, a 60-bay JBOD delivers 1200TB raw — enough for petabyte-scale object storage.

Maintenance & Troubleshooting

Maintenance Checklist

On installCheck SMART baseline on arrival
Run smartctl -a /dev/sdX and record: Reallocated_Sector_Ct, Power_On_Hours, Spin_Retry_Count. Critical for refurb drives — refuse any with reallocated sectors > 0.
MonthlyRun SMART short self-test
smartctl -t short /dev/sdX — takes 1-2 minutes, catches most developing issues. Schedule during off-peak.
QuarterlyRun SMART long self-test
smartctl -t long /dev/sdX — full surface scan, takes 10 hours for 20TB. Any test failure is grounds for immediate replacement.
QuarterlyCheck RAID array health
Verify no degraded drives. A degraded array with no hot spare is one failure from data loss. Check mdstat or controller UI.
AnnuallyVerify drive firmware version
Check WD support site for firmware updates. Some versions have known bugs affecting integrity.
Every 3-5 yearsPlan proactive replacement
Enterprise HDDs have higher failure rates after year 4-5. At 20TB per drive, budget for replacements before failures occur.

Troubleshooting Guide

Cause: Loose SATA data or power cable, failed port, or drive not spinning up.
Fix: Reseat both cables. Try a different port. Listen for spin-up sound. Test with a known-good cable.