The purposes is to provide data redundancy, performance improvement, or in certain cases: both. The term was coined in a paper by Patterson at.

The particular configuration depends on the required level of performance and redundancy. Each RAID level provides a particular balance across several variables: reliability, availability, performance, and capacity.

The techniques to achieve that are: mirroring , in which identical data is copied onto more than one drive; striping , which partitions each drive's storage space into units ranging from a sector up to several mb; parity - in which information is striped across each drive, allowing the RAID to continue working even if one drive were to fail.

Parity uses the XOR operation to allow information to be restored in case of a drive failure. Check the graphs below the levels table for visuals.

RAID levels greater than RAID 0 provide protection against unrecoverable sector read errors, as well as against failures of whole physical drives.

You can use the above images to better understand the intputs and outputs of the RAID calculator. In order to calculate the capacity of a disk array using our RAID capacity calculator, you need to know the peculiarities of each configuration, as some parts of it will limit the usable capacity of the array, like mirroring and parity.

Then, you need to know the number and size of the remaining disks and multiply them together. It is that simple, and it's even easier using our calculator.

This is the cost to have advantages like fault tolerance and high availability. This free RAID calculator will greatly assist you in this task.

In our RAID calculator you can select between four types of storage units: classic binary terabytes and gigabytes and SI terabytes and gigabytes.

In order to differentiate between the two, the International System of Units SI made the horrible decision to start using existing terminology to refer to something else.

Thus the terabyte TB became GB, instead of So, they needed a name for the GB terabyte, so they chose "tibibyte" with a symbol "TiB".

The story is the same with gigabyte and gibibytes GiB. Make sure to account for that insanity while planning your RAID.

In our tool we support all four. RAID is no replacement for backup. Even though some RAID levels provide data redundancy, that doesn't mean it should be used as backup of your critical files.

While a RAID protects you against drive failure, it does not protect you against errors human or otherwise , file corruption, malicious actors or RAID controller failure.

If you'd like to cite this online calculator resource and information as provided on the page, you can use the following citation: Georgiev G. Calculators Converters Randomizers Articles Search.

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