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{"id":1054,"date":"2020-05-22T08:00:37","date_gmt":"2020-05-21T23:00:37","guid":{"rendered":"https:\/\/itenterpriser.com\/?p=1054"},"modified":"2020-05-22T17:54:43","modified_gmt":"2020-05-22T08:54:43","slug":"what-is-raid-60","status":"publish","type":"post","link":"https:\/\/itenterpriser.com\/knowledge-base\/what-is-raid-60\/","title":{"rendered":"What is RAID 60? Double-parity and More Speed"},"content":{"rendered":"

RAID (Redundant Array of Inexpensive Disks) is the combining of multiple disks to mimic a single hardware storage device. Depending on the type, or “level”, RAID increases performance, capacity, and fault tolerance in some combination. So, what is RAID 60?<\/p>\n

What is RAID 60?<\/h2>\n

If you read our article on RAID 0<\/a>, which distributes (stripes) data across all the disks in the array without any parity or duplication, you may have been scared off by its complete lack of fault tolerance.<\/p>\n

However, you can leverage its superior speed and add fault tolerance by replacing individual disks with nested RAID nodes\/sub-arrays that do offer that feature. In this case: RAID 6<\/a>, the 6 in 60 (or 6+0, 0+6) which writes two sets of parity info across member disks.<\/p>\n

What is Parity Info?<\/h2>\n

Parity information at its most basic is a bit (binary 1 or 0) resulting from an XOR (Exclusive OR) operation<\/a> between two bits of data. If both data bits are 1, or both are 0, then the resulting parity bit is 0. If the bits don’t match then the resulting parity bit will be 1.<\/p>\n

Why XOR? Palindromic operation. If either of the original bits go missing, performing XOR on the remaining data bit and the generated parity bit results in the original value of the missing bit. E.g.,<\/p>\n