<p>A virtual storage method and device are disclosed, and the virtual storage method includes: acquiring a volume management mode of a logic unit LUN from a storage array, and recording the volume management mode in a splicing data; constructing a virtual LUN according to the LUN and the splicing data, mapping the virtual LUN to a host to process a reading and writing access; after receiving an I/O data packet transmitted from the host, modifying the destination address of the I/O data packet according to the splicing data; transmitting the I/O data packet to the virtual LUN; and transmitting the I/O data packet transmitted to the virtual LUN to the storage array according to the splicing data. The location of the storage array to which the I/O data packet is transmitted is same as the destination address of the I/O data packet before modified.</p>
