DatacenterDisk

WD Ultrastar vs WD Ultrastar

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

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Our Recommendation
👑
WD Ultrastar 14TB SAS

WD Ultrastar 14TB SAS wins on both price ($40.82/TB) and warranty (5 years).

Best $/TB: WD
Best Warranty: WD
Best for RAID: WD
Full Specification Comparison
Spec
WD
Ultrastar 14TB SAS
$40.82/TB
WD
Ultrastar 14TB SAS WUH721414AL5204
$42.25/TB
Brand
WD
WD
Model
Ultrastar 14TB SAS
Ultrastar 14TB SAS WUH721414AL5204
Series
Ultrastar HC530
Ultrastar HC530
Part Number
WUH721414AL5204
WUH721414AL5204
$/TB
👑$40.82
$42.25
Price
$571.45
$591.45
Condition
New
New
Capacity
14TB
14TB
Interface
SAS-12G
SAS-12G
Form Factor
3.5"
3.5"
Drive Type
HDD
HDD
Recording Tech
CMR
CMR
RPM
7,200
7,200
Cache
512MB
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
WD
WD
NAS Storage
●●
●●
Backup Target
●●●
●●●
OLTP Database
●
●
Cold Archive
●●
●●
Virtualization
●
●
AI/ML Storage
●
●
Buying Recommendation
Choose WD Ultrastar 14TB SAS if:
  • ✓ You need maximum storage per dollar
  • ✓ Your server runs 24/7 under heavy sustained load
  • ✓ You need new-with-warranty for compliance or budgeting
Buy WD →
Choose WD Ultrastar 14TB SAS WUH721414AL5204 if:
  • ✓ 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
  • ✓ You need new-with-warranty for compliance or budgeting
Buy WD →

Frequently Asked Questions

WD Ultrastar offers better value at $40.82/TB vs $42.25/TB - a 3% 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.

WD Ultrastar 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.