RAID Capacity Comparison

Compare capacity of two RAID configurations:

Results:	Configuration #1	Configuration #2
Total usable storage capacity (TB):	2.00	1.00
RAID type:	RAID-Z2	RAID-DP
Number of RAID groups:	2	2
Number of drives per RAID group:	4	3
Total number of drives:	8	6
Drive capacity (GB):	500	500
Capacity of a single RAID group (GB):	1000	500
Space efficiency:	0.5 (50%)	0.3333 (33.33%)
Fault tolerance (disk drives per RAID group):	2	2
Single drive cost:
Cost per TB usable:
Total cost:

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

About:
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).