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{"id":1050,"date":"2020-05-06T15:23:42","date_gmt":"2020-05-06T06:23:42","guid":{"rendered":"https:\/\/itenterpriser.com\/?p=1050"},"modified":"2020-05-09T20:21:17","modified_gmt":"2020-05-09T11:21:17","slug":"what-is-raid-50","status":"publish","type":"post","link":"https:\/\/itenterpriser.com\/knowledge-base\/what-is-raid-50\/","title":{"rendered":"What is RAID 50? RAID 0 Speed, RAID 5 Parity"},"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 50?<\/p>\n

What is RAID 50?<\/h2>\n

Fifty is the new Five, okay, the new Five-O, or to be slightly more accurate–the new 0-5 as in RAID 0<\/a> striping across nested RAID 5<\/a> sub-arrays. Yes, the speedy but dangerous RAID 0 has found its margin of safety through the use of RAID 5 members rather than individual disks.<\/p>\n

RAID 0 stripes data across multiple disks, or in this case, multiple nodes or sub-arrays. The nested RAID 5 arrays add fault tolerance by writing one block of parity data for each block of data. Parity blocks are distributed across all the disks in such a way that they never reside on the disk that contains the data they’re protecting.<\/p>\n

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

Parity information at its most basic level 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