DatacenterDisk

Dell M40TH vs HGST Ultrastar

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

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Our Recommendation
👑
HGST Ultrastar He8 8TB SAS 12G NAS

HGST Ultrastar He8 8TB SAS 12G NAS wins on both price ($36.13/TB) and warranty (5 years).

Best $/TB: HGST
Best Warranty: HGST
Best for RAID: HGST
Full Specification Comparison
Spec
Dell
M40TH 8TB SAS 12G 512E
$46.88/TB
HGST
Ultrastar He8 8TB SAS 12G NAS
$36.13/TB
Brand
Dell
HGST
Model
M40TH 8TB SAS 12G 512E
Ultrastar He8 8TB SAS 12G NAS
Series
PowerEdge OEM
Ultrastar He
Part Number
M40TH
HUH728080AL5200
$/TB
$46.88
👑$36.13
Price
$375.00
$289.00
Condition
New
New
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
—
128MB
Sector Size
512e
512e
Workload Rating
—
—
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
HGST
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 HGST Ultrastar He8 8TB SAS 12G NAS 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
  • ✓ You need new-with-warranty for compliance or budgeting
Buy HGST →

Frequently Asked Questions

HGST Ultrastar offers better value at $36.13/TB vs $46.88/TB - a 23% 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.

HGST Ultrastar 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.