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RAID capacity calculator

Pick a RAID level, disk count and size — see usable capacity and how many disks can fail. Plan storage without the mental math.

Usable capacity

Quick guide

RAID 0 is fast but has zero redundancy; RAID 1 mirrors; RAID 5/6 give capacity + 1/2-disk fault tolerance; RAID 10 balances speed and redundancy. RAID is not a backup — keep real backups too. Our nodes run on SSD hardware RAID, and every plan includes daily backups. Need raw storage + full control? A root VPS is the start.

FAQ

Straight answers.

Is RAID a backup?

No — RAID protects against disk failure, not deletion, ransomware or corruption. Always keep separate backups (we include daily backups).

RAID 5 vs 6 vs 10?

RAID 5 survives 1 disk loss, RAID 6 survives 2, RAID 10 is fastest and survives 1 per mirror. Pick by how much you value speed vs redundancy.

What RAID does overnight.host use?

SSD hardware RAID on single-tenant bare metal, plus automatic daily backups on every plan.

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