DatacenterDisk

MDD 3TB vs WD WD

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

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Our Recommendation
👑
WD WD Purple 3TB WD30PURZ

WD WD Purple 3TB WD30PURZ balances price ($70.00/TB), warranty (3 years), and 180TB/yr workload rating for the best overall value.

Best $/TB: MDD
Best Warranty: WD
Best for RAID: MDD
Full Specification Comparison
Spec
MDD
3TB SATA 6G 7200RPM Enterprise
$33.33/TB
WD
WD Purple 3TB WD30PURZ
$70.00/TB
Brand
MDD
WD
Model
3TB SATA 6G 7200RPM Enterprise
WD Purple 3TB WD30PURZ
Series
MDD Enterprise
WD Purple
Part Number
MDD3TSATA6472E
WD30PURZ
$/TB
👑$33.33
$70.00
Price
$99.99
$210.00
Condition
Refurb
New
Capacity
3TB
3TB
Interface
SATA-6G
SATA-6G
Form Factor
3.5"
3.5"
Drive Type
HDD
HDD
Recording Tech
CMR
—
RPM
7,200
5,400
Cache
64MB
64MB
Sector Size
512n
—
Workload Rating
—
180TB/yr
DWPD
N/A
N/A
Warranty
—
3 years
Workload Tier
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 3TB SATA 6G 7200RPM Enterprise 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 MDD →
Choose WD WD Purple 3TB WD30PURZ if:
  • ✓ You need 3-year warranty coverage for production
  • ✓ You need new-with-warranty for compliance or budgeting
Buy WD →

Frequently Asked Questions

MDD 3TB offers better value at $33.33/TB vs $70.00/TB - a 52% 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.

WD WD carries a longer 3-year warranty vs unknown years for MDD 3TB. Both are enterprise-grade drives built for 24/7 operation.

MDD 3TB 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.