Method and device for reading RAID1 (Redundant Array of Inexpensive Disk 1) equipment

The invention discloses a method and device for reading RAID1 (Redundant Array of Inexpensive Disk 1) equipment. The device comprises an information counting module, a reading block dividing module and a reading request processing module, wherein the information counting module is used for counting current state information of various member disks contained in the RAID1 equipment when a reading request of data of the RAID1 equipment is received; the reading block dividing module is used for dividing the size of reading blocks of the member disks according to the size of the data required to be read; and the reading request processing module is used for distributing the reading request onto the member disks to execute parallel data reading according to the current state information of all the member disks and the size of the reading blocks and informing idle member disks to read data of a next block into a cache in advance. The invention improves the reading efficiency of the RAID1 equipment.