RAID 1 Calculator
Every disk holds a full copy. Simple, fast reads, and survives all but one disk failing. Enter your disks below to see the usable space.
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RAID Level
Enter the number of disks and their size.
Disk Space & RAID Calculator
RAID 1 at a glance
Minimum Disks2
Usable With 6 Disks1 of 6 disks
Survives5 disks
Example (6 × 8 TB)8 TB usable
Every disk holds a full copy. Simple, fast reads, and survives all but one disk failing.
RAID Levels and Units
Questions
How much usable space does RAID 1 give?
With n equal disks: one disk. 6 × 8 TB gives 8 TB.
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