You can estimate the RAID characteristics using this RAID calculator. Usage
instructions are simple: select the desired array layout, then enter RAID
member disk capacities into the corresponding form fields. The rest is done
automatically.
For more information about RAID and RAID levels, please refer to
RAID 101.
Notes
Write speed of a RAID 5 depends upon the controller implementation
heavily. The estimation of a write speed is thus not provided for a RAID5.
Setups involving more than two member disks in a RAID1 (Mirror) array are
allowed but rarely used. Additional backup ("shadow") disks provide additional fault tolerance
at the cost of storage space overhead.
RAID10 survives any single disk failure and a half of double failures
(depending on the assignment of the failed drives).
Free from prejudices, ZAR cares about all your files equally.
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