Storage subsystem

Abstract

The storage system includes a plurality of flash memory devices, each of the flash memory devices including a flash memory controller and flash memory chips, which are configured as a RAID group and a storage controller, coupled to the plurality of flash memory devices, configured to receive data from a computer and send the data to a first flash memory device of the plurality of flash memory devices. The flash memory controller of the flash memory device is configured to receive the data from the storage controller and execute a parity operation using the data.

1 . A storage system comprising:
 a plurality of storage devices, each of which includes a device controller configured to execute an XOR operation; and   a storage controller configured to control the plurality of storage devices as a RAID group, the plurality of storage devices includes a first storage device storing old data and a second storage device storing old parity corresponding to the old data,   wherein the storage controller is configured to read the old data from the first storage device when the storage controller receives new data, which is to update the old data, and send the old data and the new data to the second storage device by using an XOR write command which instructs execution of the XOR operation based on the old data, the new data and the old parity.