DatacenterDisk

HP 695510-B21 vs HP 695842-001

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

+ Add driveShare comparison
Our Recommendation
👑
HP 695510-B21 4TB SAS 6G

HP 695510-B21 4TB SAS 6G offers the best value at $13.75/TB. Available new with manufacturer warranty.

Best $/TB: HP
Best Warranty: HP
Best for RAID: HP
Full Specification Comparison
Spec
HP
695510-B21 4TB SAS 6G
$13.75/TB
HP
695842-001 4TB SAS 6G
$15.00/TB
Brand
HP
HP
Model
695510-B21 4TB SAS 6G
695842-001 4TB SAS 6G
Series
ProLiant OEM
ProLiant OEM
Part Number
695510-B21
695842-001
$/TB
👑$13.75
$15.00
Price
$55.00
$59.99
Condition
New
New
Capacity
4TB
4TB
Interface
SAS-6G
SAS-6G
Form Factor
3.5"
3.5"
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
Check
✓ In Stock
Buy
Buy on Amazon →
Buy on Amazon →
Workload Fit
Workload
HP
HP
NAS Storage
●●
●●
Backup Target
●●●
●●●
OLTP Database
●
●
Cold Archive
●
●
Virtualization
●
●
AI/ML Storage
●
●
Buying Recommendation
Choose HP 695510-B21 4TB SAS 6G if:
  • ✓ You need maximum storage per dollar
  • ✓ You need new-with-warranty for compliance or budgeting
Buy HP →
Choose HP 695842-001 4TB SAS 6G if:
  • ✓ You're building a RAID array and need guaranteed CMR compatibility
  • ✓ You need new-with-warranty for compliance or budgeting
Buy HP →

Frequently Asked Questions

HP 695510-B21 offers better value at $13.75/TB vs $15.00/TB - a 8% 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 695510-B21 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.