Method for storing data, storage device and storage system

The invention discloses a method for storing data, a storage device and a storage system. The method may include receiving, at a storage device, an input and/or output (I/O) request including a device indication, performing, at the storage device, a determination that the device indication indicates the storage device, and providing, by the storage device, the I/O request based on the determination. The device indication may include an address of the I/O request. The method may include installing a second storage device in the storage system. The second storage device may be seamlessly mounted. The first storage device and the second storage device may be peer-to-peer devices. The method may also include receiving, at the first storage device, a second I/O request including a second device indication, performing, by the first storage device, a second determination that the second device indication indicates the second storage device, and forwarding, by the first storage device, the second I/O request to the s