RAID · Rebuild · Risk

How long until your array is safe again?

Enter your drive size, RAID type, and throughput to estimate rebuild time and the window where a second failure means data loss.

Rebuild time

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Data rebuilt

0TB

Throughput

0MB/s

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Array configuration

RAID type

Number of drives

Drive size (TB)

Read throughput (MB/s)

Controller overhead (%)

Drive size quick-pick

Drive type preset

Rebuild time assumes constant sequential I/O. Real-world rebuilds are slower under concurrent reads/writes and may vary significantly with RAID controller and drive health.

Replace proactively. NAS-rated drives from WD and Seagate are rated for 24/7 multi-drive workloads — the kind of sustained duty cycles that wear out desktop drives quickly. See NAS-rated drives →

Estimates assume equal-size drives and constant throughput. Real rebuilds are affected by concurrent I/O, drive health, and controller limits.