US 10,120,592 B2 · Storage device and maintenance/operation system therefor

Abstract

A storage subsystem constituting a pool using storage media having rewrite life and providing a logical volume having a virtual capacity to a host, wherein the storage subsystem monitors whether shortage of a remaining rewrite life of the capacity pool will occur or not within an operation period of the storage subsystem, and when it is determined that shortage of the remaining rewrite life will occur, the subsystem converts the rewrite life required to cover the shortage into drive capacity and indicates the same, or indicates the same by reducing an existing pool capacity, and requests maintenance of the subsystem. A maintenance method is provided, wherein elongation of life is executed by adding a capacity to the pool at the time of indication, and as for addition of capacity other than the elongation of life described above, a maintenance fee is charged.

Claims15

Dependent claims

A storage subsystem connected to a host computer and providing a storage area to a host computer, wherein the storage subsystem comprises:

a storage unit having one or more storage drives for storing data sent from the host computer;
and
a controller configured to manage the storage drives;
wherein out of the storage drives, one or more RAID groups are composed using multiple nonvolatile memory storage drives having a predetermined available data rewritable capacity, and a pool is provided from the one or more RAID groups, and
the controller is further configured to:
calculate a data rewrite quantity from the host computer to the pool;
and
obtain a remaining rewritable capacity of the pool based on the data rewrite quantity and the rewritable capacity of the pool at a predetermined timing or for each of a plurality of predetermined periods;
and
determine a necessity of a process for increasing the rewritable capacity of the pool based on a transition of the obtained remaining rewritable capacity and an assumed operation period of the storage subsystem.

7 more elements

A maintenance operation method of a storage subsystem including a storage unit having one or more storage drives for storing data sent from the host computer, and, out of the storage drives, one or more RAID groups are composed using multiple nonvolatile memory storage drives having a predetermined data rewritable capacity, and a pool is provided using the one or more RAID groups, the method comprising:

a first step of calculating a data rewrite quantity from the host computer to the pool;
and
a second step of obtaining a remaining rewritable capacity of the pool based on the data rewrite quantity and the rewritable capacity of the pool at a predetermined timing or for each of a plurality of predetermined periods;
and
a third step of determining a necessity of a process for increasing the rewritable capacity of the pool based on a transition of the obtained remaining rewritable capacity and an assumed operation period of the storage subsystem.

2 more elements

Dependencies are inferred from the claim text.

Storage device and maintenance/operation system therefor

Life of this patent

Storage device and maintenance/operation system therefor

Life of this patent

Abstract

Claims15