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Seagate Exos vs WD Ultrastar

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

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Our Recommendation
👑
Seagate Exos X22 22TB Renewed

Seagate Exos X22 22TB Renewed wins on both price ($22.40/TB) and warranty (5 years).

Best $/TB: Seagate
Best Warranty: Seagate
Best for RAID: Seagate
Full Specification Comparison
Spec
Seagate
Exos X22 22TB Renewed
$22.40/TB
WD
Ultrastar 22TB SATA
$37.73/TB
Brand
Seagate
WD
Model
Exos X22 22TB Renewed
Ultrastar 22TB SATA
Series
Exos X
Ultrastar HC570
Part Number
ST22000NM001H
—
$/TB
👑$22.40
$37.73
Price
$492.82
$829.99
Condition
New
New
Capacity
22TB
22TB
Interface
SATA-6G
SATA-6G
Form Factor
3.5"
3.5"
Drive Type
HDD
HDD
Recording Tech
CMR
CMR
RPM
7,200
N/A (SSD)
Cache
256MB
—
Sector Size
512e
—
Workload Rating
550TB/yr
—
DWPD
N/A
N/A
Warranty
5 years
—
Workload Tier
nearline
nearline
In Stock
Check
✓ In Stock
Buy
Buy on Amazon →
Buy on Amazon →
Workload Fit
Workload
Seagate
WD
NAS Storage
●●●
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Backup Target
●●●
●●●
OLTP Database
●
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Cold Archive
●●●
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Virtualization
●
●
AI/ML Storage
●●
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Buying Recommendation
Choose Seagate Exos X22 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 Seagate →
Choose WD Ultrastar 22TB SATA if:
  • ✓ You need new-with-warranty for compliance or budgeting
  • ✓ You need high-density storage for bulk/archive workloads
Buy WD →

Frequently Asked Questions

Seagate Exos offers better value at $22.40/TB vs $37.73/TB - a 41% 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.

Seagate Exos carries a longer 5-year warranty vs unknown years for WD Ultrastar. Longer warranty typically correlates with manufacturer confidence in reliability.

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.

Seagate Exos vs WD Ultrastar - Comparison | DatacenterDisk