DatacenterDisk

MDD 14TB vs WD Ultrastar

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

+ Add driveShare comparison
Our Recommendation
👑
MDD 14TB SATA 6G 7200RPM 256MB Enterprise

MDD 14TB SATA 6G 7200RPM 256MB Enterprise offers the best value at $25.71/TB. Available new with manufacturer warranty.

Best $/TB: MDD
Best Warranty: WD
Best for RAID: WD
Full Specification Comparison
Spec
MDD
14TB SATA 6G 7200RPM 256MB Enterprise
$25.71/TB
WD
Ultrastar 14TB SATA WUH721414ALE6L4
$35.71/TB
Brand
MDD
WD
Model
14TB SATA 6G 7200RPM 256MB Enterprise
Ultrastar 14TB SATA WUH721414ALE6L4
Series
MDD Enterprise
Ultrastar HC530
Part Number
MDD14TSATA25672E
WUH721414ALE6L4
$/TB
👑$25.71
$35.71
Price
$359.99
$499.99
Condition
New
New
Capacity
14TB
14TB
Interface
SATA-6G
SATA-6G
Form Factor
3.5"
3.5"
Drive Type
HDD
HDD
Recording Tech
CMR
CMR
RPM
7,200
7,200
Cache
256MB
512MB
Sector Size
512e
512e
Workload Rating
—
—
DWPD
N/A
N/A
Warranty
—
—
Workload Tier
nearline
nearline
In Stock
✓ In Stock
✓ In Stock
Buy
Buy on Amazon →
Buy on Amazon →
Workload Fit
Workload
MDD
WD
NAS Storage
●●●
●●●
Backup Target
●●●
●●●
OLTP Database
●
●
Cold Archive
●●
●●
Virtualization
●
●
AI/ML Storage
●
●
Buying Recommendation
Choose MDD 14TB SATA 6G 7200RPM 256MB Enterprise if:
  • ✓ You need maximum storage per dollar
  • ✓ You need new-with-warranty for compliance or budgeting
Buy MDD →
Choose WD Ultrastar 14TB SATA WUH721414ALE6L4 if:
  • ✓ You're building a RAID array and need guaranteed CMR compatibility
  • ✓ You need new-with-warranty for compliance or budgeting
Buy WD →

Frequently Asked Questions

MDD 14TB offers better value at $25.71/TB vs $35.71/TB - a 28% 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 similar warranty terms and are built for enterprise operation. Check brand-specific AFR data and Backblaze drive stats for real-world failure rate comparisons.

MDD 14TB 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.