SSD Endurance & Lifespan Calculator
Test TBW against daily writes, WAF, existing writes, reserve, and a planning horizon.
Test a candidateWrite workload planning
SSD Endurance & Write Workload Planning
Convert a drive rating, model workload writes, measure counters, and schedule a practical replacement review.
TBW & DWPD Converter
Translate TBW, PBW, DWPD, and daily write budgets.
Convert a ratingNAS SSD Cache Endurance Planner
Model per-drive cache writes for a single, mirror, stripe, or custom distribution.
Plan cache drivesVM & Container SSD Endurance Planner
Break virtual workload writes into VMs, logs, snapshots, copies, and shares.
Model virtual writesSSD Remaining Endurance Planner
Use two counter readings to schedule a threshold and replacement review.
Trend observed writesEndurance ratings need workload context
TBW, DWPD, WAF, host writes, capacity, and warranty describe different parts of a planning problem. An endurance rating is not a physical-failure date. Start by normalizing the published specification, test the candidate workload, then prefer measured writes over estimates when they become available.
Read How to Size SSD Endurance for NAS, Cache, VMs & Backups and compare classes in Consumer vs NAS vs Enterprise SSD Endurance.
Recommended workflow
Choose the next endurance question deliberately
Where to start
Begin with the converter if the SSD label is unfamiliar. Use the lifespan calculator when a candidate drive and daily workload are known. Choose the cache or virtual-workload planner when per-drive distribution matters. Use remaining endurance after you have two readings from the same counter.
Recommended workflow
Convert the specification, test the candidate, model NAS cache or VM writes, measure actual host writes, and plan replacement and budget. Re-run the model whenever migration, logging, backup, or cache policy changes. Keep low, base, and high WAF cases beside the decision.
What to prepare
Bring decimal capacity, TBW or PBW, warranty term, counter units, existing host writes, daily logical writes, layout, write shares, and a realistic procurement lead time. Save source documentation and measurement dates. Do not invent a vendor write-amplification factor.
What to do next
Connect NAS cache choices to NAS configuration, recovery-sensitive writes to Backup planning, and a replacement threshold to Cost & power. Measure counters again after a representative interval, test restore procedures, and preserve an independent backup; endurance planning does not replace availability or recovery design.