DatacenterDisk

HP ST31000640SS vs Seagate Dell

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

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Our Recommendation
👑
HP ST31000640SS 1TB SAS

HP ST31000640SS 1TB SAS offers the best value at $14.99/TB. Available new with manufacturer warranty.

Best $/TB: HP
Best Warranty: Seagate
Best for RAID: Seagate
Full Specification Comparison
Spec
HP
ST31000640SS 1TB SAS
$14.99/TB
Seagate
Dell 9W5WV 1TB SAS 2.5
$30.00/TB
Brand
HP
Seagate
Model
ST31000640SS 1TB SAS
Dell 9W5WV 1TB SAS 2.5
Series
ProLiant OEM
Enterprise
Part Number
ST31000640SS
ST91000640SS
$/TB
👑$14.99
$30.00
Price
$14.99
$30.00
Condition
Used
New
Capacity
1TB
1TB
Interface
SAS-6G
SAS-6G
Form Factor
3.5"
2.5"
Drive Type
HDD
HDD
Recording Tech
CMR
CMR
RPM
7,200
7,200
Cache
—
—
Sector Size
512n
512n
Workload Rating
—
—
DWPD
N/A
N/A
Warranty
—
—
Workload Tier
nearline
nearline
In Stock
✓ In Stock
✓ In Stock
Buy
Buy on Amazon →
Buy on Amazon →
Workload Fit
Workload
HP
Seagate
NAS Storage
●●
●●
Backup Target
●●●
●●●
OLTP Database
●
●
Cold Archive
●
●
Virtualization
●
●
AI/ML Storage
●
●
Buying Recommendation
Choose HP ST31000640SS 1TB SAS if:
  • ✓ You need maximum storage per dollar
Buy HP →
Choose Seagate Dell 9W5WV 1TB SAS 2.5 if:
  • ✓ You're building a RAID array and need guaranteed CMR compatibility
Buy Seagate →

Frequently Asked Questions

HP ST31000640SS offers better value at $14.99/TB vs $30.00/TB - a 50% 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 similar warranty terms and are built for enterprise operation. Check brand-specific AFR data and Backblaze drive stats for real-world failure rate comparisons.

HP ST31000640SS 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.