METHOD FOR ACCESSING OBJECT DISK, SYSTEM AND DISK ARRAY FOR EXPANDING CAPACITY OF THE DISK

摘要

A method for accessing the object disk and a system for expanding capacity of the disk are disclosed. The process unit in the master disk array receives the command or data, and then sends the command or data to the PCIe exchange unit in the master disk array; the PCIe exchange unit of the master disk array sends the received command or data to the control unit of the corresponding disk array based on the disk address information in the received command or data; the control unit of the corresponding disk array sends the received command or data to the object disk which directly connecting to the said corresponding disk array. The invention can reduce the carrying capacity of the control unit in the master disk array, and it can ensure the server can access the other disk array when the fault occurring in the control unit of one disk array. The invention further expands the disk capacity by concatenating the slave disk arrays with the PCIe. A master disk array and a slave disk array are also disclosed.