DatacenterDisk

Seagate 20TB SATA Enterprise HDD - Prices

3 drives tracked. Updated every 4 hours.

Best $/TB
—
Drives
3
Condition
New

Seagate 20TB SATA - worth it?

Seagate 20TB SATA drives span the Exos X enterprise line and IronWolf Pro NAS series, both CMR and RAID-safe. Starting at competitive prices.

$/TB ▲Brand / ModelCapInterfaceTechCacheSectorWtyPriceCond.90DBuy
$—
Seagate
Exos X20 20TB SATA
ST20000NM007D
5yr
20TB
SATA-6G
7,200 RPM
ePMR256MB512e5yr$——Buy →Details▼
$—
Seagate
IronWolf Pro 20TB NAS
ST20000NT001
CMR · 5yr
20TB
SATA-6G
7,200 RPM
CMR256MB512e5yr$——Buy →Details▼
$—
Seagate
IronWolf Pro 20TB NAS
ST20000NEZ00
CMR · 5yr
20TB
SATA-6G
7,200 RPM
CMR256MB512e5yr$——Buy →Details▼

Drive Specifications

Seagate Exos X20 20TB SATA
ST20000NM007D
$—/TB
$— total
Capacity
20TB
Interface
SATA-6G
Form Factor
3.5"
Recording
ePMR
RPM
7,200
Cache
256MB
Sector Size
512e
Workload
550TB/yr
Warranty
5 years
Seagate IronWolf Pro 20TB NAS
ST20000NT001
$—/TB
$— total
Capacity
20TB
Interface
SATA-6G
Form Factor
3.5"
Recording
CMR
RPM
7,200
Cache
256MB
Sector Size
512e
Workload
300TB/yr
Warranty
5 years
Seagate IronWolf Pro 20TB NAS
ST20000NEZ00
$—/TB
$— total
Capacity
20TB
Interface
SATA-6G
Form Factor
3.5"
Recording
CMR
RPM
7,200
Cache
256MB
Sector Size
512e
Workload
300TB/yr
Warranty
5 years

Other Seagate SATA capacities

4TB6TB8TB10TB12TB16TB18TB20TB22TB24TB30TB32TB

Other brands at 20TB SATA

MDDSeagateSynologyWD

Frequently Asked Questions

Seagate Exos and IronWolf Pro use CMR. Standard Barracuda may use SMR at some capacities. All enterprise drives on this page are CMR and RAID-safe.

Seagate 20TB SATA drives are compatible with all major NAS platforms including Synology DiskStation, QNAP, TrueNAS, UnRAID, and any server with SATA ports. Check your NAS manufacturer's compatibility list for confirmed models.

New Seagate 20TB SATA drives with manufacturer warranty. Recommended for production NAS and primary storage.

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. New drives come with full warranty.
💾
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. Establishes baseline for future comparison.
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 Seagate 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.