Storage system and storage control method

摘要

A storage system includes: a storage device including a recording medium that stores data and a device controller that executes addition processing involving a change of state of the data with respect to the data; and a storage controller that controls input and output of data for the storage device. The storage controller transmits, to the storage device, determination information that can be utilized by the device controller for determining whether or not to execute the addition processing along with input-output processing relating to input-output target data. The device controller controls execution of the addition processing with respect to the input-output target data based on the determination information transmitted from the storage controller.

主权项

1. A storage system comprising:
a plurality of storage devices, each of the plurality of storage devices including a device controller and a storage medium; and a storage controller configured to control the plurality of storage devices as a RAID group, the plurality of storage devices including a first storage device storing old data and a second storage device storing old parity associated with the old data, wherein the storage controller is configured to:
send new data for updating the old data to the first storage device; a first device controller of the first storage device is configured to:
generate an intermediate parity based on the old data and the new data;compress the new data; andsend the intermediate parity to the storage controller; the storage controller is configured to:
send a parity generation command indicating to generate new parity based on the old parity and the intermediate parity to the second storage device; andsend the intermediate parity with the parity generation command to the second storage device; and a second device controller of the second storage device is configured to:
generate the new parity based on the old parity and the intermediate parity; andstore the new parity into the storage medium without compressing the new parity based on the parity generation command.