Raid Calculator


Select Type:
Operating System:
Number of Drives*:
Total Storage Capacity*:
Required Fields*
Usable Space
Fault Tolerance

Please make choices to see results.
Please make choices to see results.

For hard drives 3TB or larger RAID 6 is recommended.
Windows® OS reduces capacity by 100MB per disk for use by operating system.

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RAID Type

RAID 0


Minimum HDD required: 2

Pros: Data is divided into equal shares and written into the hard disks. Data access is quicker and more efficient.

Cons: If one drive fails, all data is lost and you must restore from additional backup.

 

RAID 1


Minimum HDD required: 2

Pros: The same data is mirrored to all HDDs. If one drive fails, data integrity will not be affected.

Cons: The available volume is limited to the storage capacity of one HDD.

 

RAID 5


Minimum HDD required: 3

Pros: It offers 1 HDD redundancy. Data is striped across multiple disks with a parity check bit to the data. If one drive fails, the parity check bit will ensure data integrity.

Cons: The storage capacity of 1 drive is reserved for data integrity check and therefore slightly affects the available volume size.

 

RAID 6


Minimum HDD required: 4

Pros: It offers 2 HDD redundancy. Data is striped across multiple disks with a parity check bit to the data. The parity check bit ensures data integrity.

Cons: The storage capacity of 2 drives are reserved for data integrity check and therefore slightly affects the available volume size.