DatacenterDisk

MDD 20TB vs Seagate SkyHawk

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

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Our Recommendation
👑
MDD 20TB SATA 7200RPM NAS

MDD 20TB SATA 7200RPM NAS wins on both price ($25.00/TB) and warranty (5 years).

Best $/TB: MDD
Best Warranty: Seagate
Best for RAID: Seagate
Full Specification Comparison
Spec
MDD
20TB SATA 7200RPM NAS
$25.00/TB
Seagate
SkyHawk AI 20TB ST20000VE003
$36.00/TB
Brand
MDD
Seagate
Model
20TB SATA 7200RPM NAS
SkyHawk AI 20TB ST20000VE003
Series
MDD Enterprise
SkyHawk AI
Part Number
MD20TSATA25672NAS
ST20000VE003
$/TB
👑$25.00
$36.00
Price
$499.99
$719.99
Condition
Refurb
New
Capacity
20TB
20TB
Interface
SATA-6G
SATA-6G
Form Factor
3.5"
3.5"
Drive Type
HDD
HDD
Recording Tech
CMR
CMR
RPM
7,200
N/A (SSD)
Cache
256MB
512MB
Sector Size
512e
—
Workload Rating
👑550TB/yr
👑550TB/yr
DWPD
N/A
N/A
Warranty
👑5 years
👑5 years
Workload Tier
nearline
—
In Stock
✓ In Stock
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Workload Fit
Workload
MDD
Seagate
NAS Storage
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Backup Target
●●●
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OLTP Database
●
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Cold Archive
●●●
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Virtualization
●
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AI/ML Storage
●●
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Buying Recommendation
Choose MDD 20TB SATA 7200RPM NAS if:
  • ✓ You need maximum storage per dollar
  • ✓ Your server runs 24/7 under heavy sustained load
  • ✓ You're comfortable with datacenter refurb to maximize savings
  • ✓ You need high-density storage for bulk/archive workloads
Buy MDD →
Choose Seagate SkyHawk AI 20TB ST20000VE003 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 Seagate →

Frequently Asked Questions

MDD 20TB offers better value at $25.00/TB vs $36.00/TB - a 31% 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 20TB 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.