US 2020/0401346 A1 · STORAGE SYSTEM

Abstract

A storage system includes a plurality of storage controllers and a drive box including one or more non-volatile storage devices. The drive box includes a memory on which reading and writing are performed in a unit different from a unit for reading and writing the one or more non-volatile storage devices, and which stores control information to be used by the plurality of storage controllers, and a memory controller that enables each storage controller of the plurality of storage controllers to exclusively read and write the control information of the memory by arbitrating accesses to the memory from the plurality of storage controllers.

Claims15

Dependent claims

A storage system comprising:

a plurality of storage controllers;
and
a drive box that includes one or more non-volatile storage devices, wherein
the drive box includes
a memory on which reading and writing are performed in a unit different from a unit for reading and writing the one or more non-volatile storage devices, and which stores control information to be used by the plurality of storage controllers, and
a memory controller that enables each storage controller of the plurality of storage controllers to exclusively read and write the control information of the memory by mediating access to the memory from each of the plurality of storage controllers.

3 more elements

A control method of a storage system, wherein

the storage system includes
a plurality of storage controllers, and
a drive box that includes one or more non-volatile storage devices, and a memory on which reading and writing are performed in a unit different from a unit for reading and writing the one or more non-volatile storage devices and which stores control information to be used by the plurality of storage controllers, and
the control method includes
receiving an exclusive access command for the control information of the memory from one storage controller of the plurality of storage controllers,
letting another access command received from the storage controller different from the one storage controller wait until the exclusive access command is completed, and
executing the other access command after the exclusive access command is completed.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/801,334Filed 26 Feb 2020

Priority

JP 2019-11429020 Jun 2019

Published

24 Dec 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G06F 3/0659
Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices: command handling…
G06F 3/067
Adopting a particular infrastructure: distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
G06F 3/0604
Specifically adapted to achieve a particular effect: improving or facilitating administration, e.g. storage management
G06F 3/061
Specifically adapted to achieve a particular effect: improving I/O performance

Storage system

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Storage system

Life of this patent

Abstract

Claims15