Enterprise SSD Endurance Explained: DWPD, Wear Level, and Why Your "Used" Drive Still Has Value

By The Founder · Reviewed July 7, 2026 · About the author

DWPD, translated

Drive Writes Per Day: a 1.92TB drive rated 1 DWPD may absorb 1.92TB of writes daily, every day of its 5-year warranty — about 3.5 petabytes lifetime. Read-intensive drives run 0.5–1 DWPD; mixed-use 3; write-intensive 10. Almost no real workload uses a fraction of that.

Reading the wear yourself

smartctl on any OS: Percentage Used (NVMe) or Wear Leveling Count / Media Wearout Indicator (SATA) is the drive's own odometer. A typical drive retired from a 4-year data-center rotation shows 8–20% used — meaning 80%+ of its engineered life remains.

Why that remaining life is worth money

A PM983 3.84TB at 12% wear is, functionally, a multi-petabyte-endurance drive at a used price — which is why homelabbers and refurbishers bid for them and why we pay $140–$185. Same story for the P4510 4TB and Micron 7450 PRO.

How we grade it

SMART at intake: ≥90% life and zero reallocated = grade A (full price); 70–89% = B (0.75×); everything below is honest math, not a haggle. Wear screenshots come with any revision. Current ranges: the Payout Index. Quote your drives.