RAID Capacity Calculator

Compare two RAID configurations:

Configuration #1
Configuration #2
RAID type:
Drive capacity (GB):
Single drive cost: 
Number of drives per RAID group: 
Number of RAID groups:

Results: Configu­ration #1Configu­ration #2
Total usable storage capacity (TB):  2.002.00
Number of RAID groups:22
Number of drives per RAID group: 42
Total number of drives:84
Drive capacity (GB):500500
Capacity of a single RAID group (GB): 10001000
Space efficiency:0.5 (50%)1 (100%)
Fault tolerance
(disk drives per RAID group): 
Single drive cost:
Cost per TB usable:
Total cost:

Note: 1 TB = 1000 GB and 1 TiB = 1024 GiB

This RAID calculator computes characteristics for two storage arrays based on the provided RAID level, number of disk drives, and drive capacity.

Supported RAID levels are:

  • RAID 0 (block-level striping without parity or mirroring);
  • RAID 1 (mirroring without parity or striping);
  • RAID 1E (mirroring with striping);
  • 3-Way Mirror or Triple Mirror (mirroring without parity or striping);
  • RAID 3 (byte-level striping with a dedicated parity disk);
  • RAID 4 (block-level striping with a dedicated parity disk);
  • RAID 5 (block-level striping with distributed parity);
  • RAID 5E (RAID 5 Enhanced) and RAID 5EE (RAID 5E Enhanced) (block-level striping with distributed parity and integrated active distributed hot-spare);
  • RAID 6 (block-level striping with double distributed parity);
  • RAID 10 (1+0) (striped mirrors - a combination of multiple RAID 1 groups with RAID 0);
  • RAID 50 (combination of multiple RAID 5 groups with RAID 0);
  • RAID 60 (combination of multiple RAID 6 groups with RAID 0);
  • RAID-DP (stripe set with double parity and two dedicated parity disks);
  • RAID-TEC (triple erasure encoding);
  • RAID-Z1 (single parity with variable stripe width);
  • RAID-Z2 (double parity with variable stripe width);
  • RAID-Z3 (triple parity with variable stripe width).