Patent ID: 7904653

Claim:
A disk order examining system for a dual-controller redundant storage device, comprising: a disk concatenation having a plurality of disks for data access; a master controller linking the plurality of disks of the disk concatenation in a first configuration order and accessing data according to the disk concatenation; a slave controller linking the plurality of disks of the disk concatenation in a second configuration order and accessing data according to the disk concatenation for backing up the master controller; a data write-in module disposed in the master controller generating a plurality of random numbers and writing the plurality of random numbers into the plurality of disks in sequence as the plurality of disks linked to the master controller; an examining module disposed in the slave controller reading out the plurality of random numbers from the plurality of disks in sequence as the plurality of disks linked to the slave controller and determining whether the first configuration order is consistent with the second configuration order or not; and wherein the examining module ceasing backup function of the slave controller to backup the master controller, when the examining module determines the second configuration order is inconsistent with the first configuration order.