US 10,884,630 B2Granted

Storage system

AssigneeHitachi, Ltd.

InventorsKoji Hosogi, Naoya Okada, Akifumi Suzuki, Hideyuki Koseki, Masahiro Tsuruya

Life of this patent

Estimating the term…

Loading patent…

Abstract

A storage system includes a controller and a nonvolatile memory drive, in which the controller transmits a write request that designates a volume identifier of a volume to be provided to a host, to the nonvolatile memory drive; the nonvolatile memory drive exclusively allocates a free block selected from a plurality of blocks to the volume identifier; write data of the write request is written to the free block; when the write data is update write data, an area that stores data to be updated is changed to an invalid data area; and after valid data of a block including the invalid data area is migrated to another block, all data of the block including the invalid data area is erased.

Claims10

Dependent claims

A storage system including a controller and a nonvolatile memory drive,

wherein the controller transmits, to the nonvolatile memory drive, a write request that designates a first volume identifier of a first logical volume of a plurality of logical volumes to be provided to a host and block allocation information indicating a block allocation policy for the first logical volume,
the nonvolatile memory drive exclusively allocates a free block selected from a plurality of blocks to the first volume identifier based on the block allocation information,
write data of the write request is written to the free block,
when the write data is update write data, an area that stores data to be updated by the update write data is changed to an invalid data area, and
after valid data of a block including the invalid data area is migrated to another block, all data of the block including the invalid data area is erased.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/332,771Filed 13 Apr 2017
Published: US 2019/0361611 A128 Nov 2019
Granted: 5 Jan 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

G06F 3/061
Specifically adapted to achieve a particular effect: improving I/O performance
G06F 3/0611
Improving I/O performance: in relation to response time
G06F 3/0619
Improving the reliability of storage systems: in relation to data integrity, e.g. data losses, bit errors
G06F 3/0631
Configuration or reconfiguration of storage systems: by allocating resources to storage systems