Patent ID: 7970993

Claim:
A rotating parity redundant array of independent disk (RAID), comprising: a first disk having an A 1 block, an A 2 block, . . . , and an A m block used for storing an A 1 data, an A 2 data, . . . , and an A m data respectively; a second disk having a B 1 block, a B 2 block, . . . , and a B m block used for storing a B 1 data, a B 2 data, . . . , and a B m data respectively; and a third disk having a C 1 block, a C 2 block, . . . , and a C m block used for storing a C 1 data, a C 2 data, . . . , and a C m data respectively, wherein the C n+k data is an n th parity data obtained from the A n data and the B n data; the B n+k+1 data is an (n+1) th parity data obtained from the C n+1 data and the A n+1 data; the A n+k+2 data is an (n+2) th parity data obtained from the B n+2 data and the C n+2 data, wherein 1 ≦(n+k+2)≦m, besides, k=x*y, x is the number of the disks, the value of y is determined according to the writing speed of the disks, y, m, n and k are positive integers.