DatacenterDisk

Seagate IronWolf vs Western Digital WD

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

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Our Recommendation
👑
Seagate IronWolf 8TB NAS ST8000VNZ04

Seagate IronWolf 8TB NAS ST8000VNZ04 offers the best value at $35.62/TB. As a refurb unit, verify SMART data on arrival.

Best $/TB: Seagate
Best Warranty: Western Digital
Best for RAID: Seagate
Full Specification Comparison
Spec
Seagate
IronWolf 8TB NAS ST8000VNZ04
$35.62/TB
Western Digital
WD Purple 8TB WD81PURZ
$62.11/TB
Brand
Seagate
Western Digital
Model
IronWolf 8TB NAS ST8000VNZ04
WD Purple 8TB WD81PURZ
Series
IronWolf
WD Purple
Part Number
ST8000VNZ04
WD81PURZ
$/TB
👑$35.62
$62.11
Price
$284.99
$496.84
Condition
Refurb
New
Capacity
8TB
8TB
Interface
SATA-6G
SATA-6G
Form Factor
3.5"
3.5"
Drive Type
HDD
HDD
Recording Tech
CMR
—
RPM
7,200
5,400
Cache
256MB
256MB
Sector Size
—
—
Workload Rating
👑180TB/yr
👑180TB/yr
DWPD
N/A
N/A
Warranty
👑3 years
👑3 years
Workload Tier
nas
—
In Stock
Check
✓ In Stock
Buy
Buy on Amazon →
Buy on Amazon →
Workload Fit
Workload
Seagate
Western Digital
NAS Storage
●●●
●●●
Backup Target
●●●
●●●
OLTP Database
●
●
Cold Archive
●●
●●
Virtualization
●
●
AI/ML Storage
●
●
Buying Recommendation
Choose Seagate IronWolf 8TB NAS ST8000VNZ04 if:
  • ✓ You need maximum storage per dollar
  • ✓ You're building a RAID array and need guaranteed CMR compatibility
  • ✓ You're comfortable with datacenter refurb to maximize savings
Buy Seagate →
Choose Western Digital WD Purple 8TB WD81PURZ if:
  • ✓ You need 3-year warranty coverage for production
  • ✓ You need new-with-warranty for compliance or budgeting
Buy Western Digital →

Frequently Asked Questions

Seagate IronWolf offers better value at $35.62/TB vs $62.11/TB - a 43% 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 3-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.