DatacenterDisk

Dell M40TH vs Seagate Enterprise

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

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Our Recommendation
👑
Seagate Enterprise Capacity 8TB SAS 12G

Seagate Enterprise Capacity 8TB SAS 12G wins on both price ($21.88/TB) and warranty (5 years).

Best $/TB: Seagate
Best Warranty: Seagate
Best for RAID: Seagate
Full Specification Comparison
Spec
Dell
M40TH 8TB SAS 12G 512E
$30.59/TB
Seagate
Enterprise Capacity 8TB SAS 12G
$21.88/TB
Brand
Dell
Seagate
Model
M40TH 8TB SAS 12G 512E
Enterprise Capacity 8TB SAS 12G
Series
PowerEdge OEM
Enterprise Capacity
Part Number
M40TH
ST8000NM0075
$/TB
$30.59
👑$21.88
Price
$244.75
$175.00
Condition
New
Refurb
Capacity
8TB
8TB
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
—
—
Sector Size
512e
512e
Workload Rating
—
550TB/yr
DWPD
N/A
N/A
Warranty
—
5 years
Workload Tier
nearline
nearline
In Stock
✓ In Stock
✓ In Stock
Buy
Buy on Amazon →
Buy on Amazon →
Workload Fit
Workload
Dell
Seagate
NAS Storage
●●
●●
Backup Target
●●●
●●●
OLTP Database
●
●
Cold Archive
●●
●●
Virtualization
●
●
AI/ML Storage
●
●
Buying Recommendation
Choose Dell M40TH 8TB SAS 12G 512E if:
  • ✓ You need new-with-warranty for compliance or budgeting
Buy Dell →
Choose Seagate Enterprise Capacity 8TB SAS 12G 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 Seagate →

Frequently Asked Questions

Seagate Enterprise offers better value at $21.88/TB vs $30.59/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.

Seagate Enterprise carries a longer 5-year warranty vs unknown years for Dell M40TH. Both are enterprise-grade drives built for 24/7 operation.

Dell M40TH 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.