Flash memory storage system
View Patent ↗A flash memory storage system has a plurality of flash memory devices comprising a plurality of flash memories, and a controller having an I/O processing control unit for accessing a flash memory device specified by a designated access destination in an I/O request received from an external device from among the plurality of flash memory devices. A parity group can be configured of flash memory devices having identical internal configuration.
1. A storage system comprising:
a plurality of flash memory devices (FMDs), each of the plurality of FMDs including a first controller and a plurality of first flash memory packages configured to store data; and
a storage controller coupled to the plurality of FMDs and a plurality of hard disk drives (HDDs), the storage controller processing an input/output (I/O) request from an external device to the plurality of FMDs or the plurality of HDDs,
wherein at least one first controller of the plurality of FMDs computes a first parity for data stored in the plurality of first flash memory packages included in at least one of the plurality of FMDs.
2. The storage system according to claim 1 , wherein the storage controller computes a second parity for data stored in the HDDs.
3. The storage system according to claim 2 , wherein each first controller in the plurality of FMDs configures a first parity group with the first flash memory packages.
4. The storage system according to claim 3 , wherein the HDDs are not included in the first parity group.
5. The storage system according to claim 1 , wherein the storage controller is coupled to a plurality of second flash memory devices and configures a second parity group with the plurality of second flash memory devices.
6. The storage system according to claim 1 , wherein the storage controller configures a third parity group with the plurality of FMDs.