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Free tool · RAID failure simulator
Click any drive to fail it, then click it again to bring it back. Watch which blocks survive, which are rebuilt from parity, and the point where the array stops being recoverable on its own.
Each drive is a button: click it, or focus it and press Enter or Space. Use the left and right arrow keys to move between the preset scenarios above.
Work out capacity and rebuild risk → Real array degraded? Rebuild or stop? →
Questions
One. Fail a second drive in the simulator and the array can no longer be rebuilt from parity on its own.
RAID 0, 1, 5, 6 and 10. Use the level buttons above the drawing to switch between them.
No. It shows how each level protects data in principle. It cannot see your drives. If yours has lost drives, call before anyone rebuilds.
A drive has already dropped out
If the data matters, shut the array down cleanly and call. Our lab images every drive before any rebuild, then works from the copies.