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RAID Calc

RAID calculator — compute usable capacity, raw storage, overhead and fault tolerance for RAID 0, 1, 5, 6, 10, 50 and 60.

raid arrayRAID 5
Usable Capacity
16.00 TB
16.00 TB / 15.63 TiB
Raw Capacity
20.00 TB
20.00 TB / 19.53 TiB
Overhead
4.00 TB
1 parity drive equiv.
Fault Tolerance
1
1 drive can fail
Storage Efficiency80%
Usable: 16.00 TBRaw: 20.00 TB
Drive Layout
D
D
D
D
P
DataParity
RAID 5 stripes data with distributed parity. One drive can fail without data loss.