DatacenterDisk

Seagate Exos vs WD Ultrastar

Side-by-side spec and price comparison. Live data from Amazon US.

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Our Recommendation
👑
WD Ultrastar DC HC580 22TB Renewed

WD Ultrastar DC HC580 22TB Renewed wins on both price ($18.41/TB) and warranty (5 years).

Best $/TB: WD
Best Warranty: WD
Best for RAID: WD
Full Specification Comparison
Spec
Seagate
Exos X22 22TB Renewed
$22.40/TB
WD
Ultrastar DC HC580 22TB Renewed
$18.41/TB
Brand
Seagate
WD
Model
Exos X22 22TB Renewed
Ultrastar DC HC580 22TB Renewed
Series
Exos X
Ultrastar DC
Part Number
ST22000NM001H
WUH722222BLE6L4
$/TB
$22.40
👑$18.41
Price
$492.82
$404.99
Condition
New
Refurb
Capacity
22TB
22TB
Interface
SATA-6G
SATA-6G
Form Factor
3.5"
3.5"
Drive Type
HDD
HDD
Recording Tech
CMR
ePMR
RPM
7,200
7,200
Cache
256MB
512MB
Sector Size
512e
512e
Workload Rating
👑550TB/yr
👑550TB/yr
DWPD
N/A
N/A
Warranty
👑5 years
👑5 years
Workload Tier
nearline
nearline
In Stock
✓ In Stock
✓ In Stock
Buy
Buy on Amazon →
Buy on Amazon →
Workload Fit
Workload
Seagate
WD
NAS Storage
●●●
●●●
Backup Target
●●●
●●●
OLTP Database
●
●
Cold Archive
●●●
●●●
Virtualization
●
●
AI/ML Storage
●●
●●
Buying Recommendation
Choose Seagate Exos X22 22TB Renewed if:
  • ✓ Your server runs 24/7 under heavy sustained load
  • ✓ You need new-with-warranty for compliance or budgeting
  • ✓ You need high-density storage for bulk/archive workloads
Buy Seagate →
Choose WD Ultrastar DC HC580 22TB Renewed if:
  • ✓ You need maximum storage per dollar
  • ✓ You need 5-year warranty coverage for production
  • ✓ You're building a RAID array and need guaranteed CMR compatibility
  • ✓ Your server runs 24/7 under heavy sustained load
Buy WD →

Frequently Asked Questions

WD Ultrastar offers better value at $18.41/TB vs $22.40/TB - a 18% price difference. Factor in warranty length and workload rating when the price gap is small.

Mixing drives of different models in RAID is not recommended even if capacities match. Different firmware, error handling and seek patterns can cause rebuild issues. Use identical drives within the same RAID group for reliable operation.

Both drives carry 5-year warranties and are built for enterprise operation. Check brand-specific AFR data and Backblaze drive stats for real-world failure rate comparisons.

Seagate Exos is the better fit for NAS storage. It uses CMR recording which is safe for all RAID levels. SATA interface is compatible with all NAS platforms including Synology, QNAP and TrueNAS.