The attributes behind your decision
- Decision input
- Measured workload
- Primary variables
- Capacity, control, operations
- Validation
- Representative testing
- Next step
- dedicated servers
Distinguish interface from storage media
NVMe is a protocol commonly used with flash storage, while SSD describes solid-state media across interfaces. HDD uses magnetic disks. Compare the offered device and interface rather than treating every SSD as equivalent.
Use latency and queue depth for active data
Databases, search indexes and busy application storage often depend on predictable latency and parallel I/O. Test a realistic request pattern with a data set larger than the easiest cache layer.
Use capacity economics for archives carefully
HDD can suit large sequential data sets and archives when latency is less important. The storage tier still needs redundancy, monitoring and a separate backup strategy.
Plan endurance, failure and restoration
Review write volume, device health, RAID behavior, rebuild exposure and replacement procedures. RAID can improve availability but does not replace versioned, restorable backups.
Compare usable capacity and response under load
NVMe is an interface commonly used by SSDs; SSD describes solid-state storage, while HDD describes rotating media. Comparing NVMe with SSD as if they were unrelated media types can hide the actual distinction. Record interface, capacity, endurance requirements and the application’s read/write pattern.
Test the workload with its expected concurrency and data size. A database may be sensitive to random I/O and tail latency, while a sequential archive may prioritize capacity. Reserve room for logs, temporary files and maintenance, and compare usable storage after any redundancy layout rather than raw disk totals.