DatacenterDisk

MDD 18TB vs MDD 18TB

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

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Our Recommendation
👑
MDD 18TB SATA 7200RPM Enterprise

MDD 18TB SATA 7200RPM Enterprise wins on both price ($21.67/TB) and warranty (5 years).

Best $/TB: MDD
Best Warranty: MDD
Best for RAID: MDD
Full Specification Comparison
Spec
MDD
18TB SATA 6G 7200RPM NAS
$21.67/TB
MDD
18TB SATA 7200RPM Enterprise
$21.67/TB
Brand
MDD
MDD
Model
18TB SATA 6G 7200RPM NAS
18TB SATA 7200RPM Enterprise
Series
MDD Enterprise
MDD Enterprise
Part Number
MD18TSATA25672NAS
MDD18TSATA25672E
$/TB
👑$21.67
👑$21.67
Price
$389.99
$389.99
Condition
New
New
Capacity
18TB
18TB
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
256MB
Sector Size
512e
512e
Workload Rating
—
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
MDD
MDD
NAS Storage
●●●
●●●
Backup Target
●●●
●●●
OLTP Database
●
●
Cold Archive
●●●
●●●
Virtualization
●
●
AI/ML Storage
●●
●●
Buying Recommendation
Choose MDD 18TB SATA 6G 7200RPM NAS if:
  • ✓ You need new-with-warranty for compliance or budgeting
  • ✓ You need high-density storage for bulk/archive workloads
Buy MDD →
Choose MDD 18TB 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
Buy MDD →

Frequently Asked Questions

MDD 18TB offers better value at $21.67/TB vs $21.67/TB - a 0% 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.

MDD 18TB 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.