Virtual storage method and device

A virtualization device, comprising:

• an obtaining module, configured to obtain a volume management mode of a Logical Unit Number (LUN) from a storage array;
• a recording module, configured to record the volume management mode obtained by the obtaining module into stitch data;
• a stitching module, configured to construct a virtual LUN according to the LUN and the stitch data obtained by the recording module, and map the virtual LUN to a host to enable read/write access;
• and
• an Input/Output (I/O) data packet processing module, configured to modify a destination address of an I/O data packet delivered by the host according to the stitch data obtained by the recording module after receiving the I/O data packet, deliver the I/O data packet to the virtual LUN, and deliver the I/O data packet which has been delivered to the virtual LUN to the storage array according to the stitch data, wherein an address of the storage array to which the I/O data packet is delivered is the same as the destination address of the I/O data packet before the destination address of the I/O data packet is modified.