DatacenterDisk

Seagate Enterprise vs WD Ultrastar

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

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Our Recommendation
👑
Seagate Enterprise Capacity 8TB SAS 12G

Seagate Enterprise Capacity 8TB SAS 12G wins on both price ($24.88/TB) and warranty (5 years).

Best $/TB: Seagate
Best Warranty: Seagate
Best for RAID: Seagate
Full Specification Comparison
Spec
Seagate
Enterprise Capacity 8TB SAS 12G
$24.88/TB
WD
Ultrastar 8TB SAS
$55.49/TB
Brand
Seagate
WD
Model
Enterprise Capacity 8TB SAS 12G
Ultrastar 8TB SAS
Series
Enterprise Capacity
Ultrastar HC320
Part Number
ST8000NM0075
—
$/TB
👑$24.88
$55.49
Price
$199.00
$443.94
Condition
Refurb
New
Capacity
8TB
8TB
Interface
SAS-12G
SAS-12G
Form Factor
3.5"
3.5"
Drive Type
HDD
HDD
Recording Tech
CMR
CMR
RPM
7,200
N/A (SSD)
Cache
—
—
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
●●
●●
Backup Target
●●●
●●●
OLTP Database
●
●
Cold Archive
●●
●●
Virtualization
●
●
AI/ML Storage
●
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Buying Recommendation
Choose Seagate Enterprise Capacity 8TB SAS 12G 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 8TB SAS if:
  • ✓ You need new-with-warranty for compliance or budgeting
Buy WD →

Frequently Asked Questions

Seagate Enterprise offers better value at $24.88/TB vs $55.49/TB - a 55% 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 Enterprise carries a longer 5-year warranty vs unknown years for WD Ultrastar. Longer warranty typically correlates with manufacturer confidence in reliability.

Seagate Enterprise is the better fit for NAS storage. It uses CMR recording which is safe for all RAID levels. SAS interface requires a SAS HBA or SAS-capable NAS.