DatacenterDisk

Seagate IronWolf vs WD DC

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

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Our Recommendation
👑
WD DC HC550 16TB SATA 7200RPM Enterprise

WD DC HC550 16TB SATA 7200RPM Enterprise wins on both price ($20.63/TB) and warranty (5 years).

Best $/TB: WD
Best Warranty: WD
Best for RAID: WD
Full Specification Comparison
Spec
Seagate
IronWolf Pro 16TB NAS ST16000NE000
$37.44/TB
WD
DC HC550 16TB SATA 7200RPM Enterprise
$20.63/TB
Brand
Seagate
WD
Model
IronWolf Pro 16TB NAS ST16000NE000
DC HC550 16TB SATA 7200RPM Enterprise
Series
IronWolf Pro
Ultrastar DC
Part Number
ST16000NE000
WUH721816ALE6L4
$/TB
$37.44
👑$20.63
Price
$599.00
$330.00
Condition
New
New
Capacity
16TB
16TB
Interface
SATA-6G
SATA-6G
Form Factor
3.5"
3.5"
Drive Type
HDD
HDD
Recording Tech
CMR
ePMR
RPM
N/A (SSD)
7,200
Cache
—
512MB
Sector Size
—
512e
Workload Rating
300TB/yr
👑550TB/yr
DWPD
N/A
N/A
Warranty
👑5 years
👑5 years
Workload Tier
nas
nearline
In Stock
✓ In Stock
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Buy
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Out of stock
Workload Fit
Workload
Seagate
WD
NAS Storage
●●●
●●●
Backup Target
●●●
●●●
OLTP Database
●
●
Cold Archive
●●●
●●●
Virtualization
●
●
AI/ML Storage
●●
●●
Buying Recommendation
Choose Seagate IronWolf Pro 16TB NAS ST16000NE000 if:
  • ✓ You need new-with-warranty for compliance or budgeting
  • ✓ You need high-density storage for bulk/archive workloads
Buy Seagate →
Choose WD DC HC550 16TB SATA 7200RPM Enterprise 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

Frequently Asked Questions

WD DC offers better value at $20.63/TB vs $37.44/TB - a 45% 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 IronWolf 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.