US 2019/0196911 A1 · COMPUTER SYSTEM

Abstract

A method for restoring lost data in a failed storage drive includes: detecting a trouble in a storage drive in a first RAID group of a first RAID type; in each of striped lines including host data which is lost due to a failure of the storage drive, restoring the host data, in the first RAID group; forming data of a striped line of a second RAID type from host data of a striped line of the first RAID group, the number of strips of the second RAID type being smaller than the number of strips of the first RAID type; configuring a second RAID group of the second RAID type by a storage drive included in the first RAID group excluding the failed storage drive; and storing data of a striped line of the second RAID type in the second RAID group.

Claims8

Dependent claims

A computer system comprising:

a memory;
and
a processor which operates in accordance with a program stored in the memory,
wherein the processor
detects a failure of a storage drive in a first RAID group of a first RAID type,
in each of striped lines including lost host data due to a failure of the storage drive, restores the host data, in the first RAID group,
forms data of a striped line of a second RAID type from host data of a striped line in the first RAID group, number of strips of the second RAID type being smaller than number of strips of the first RAID type,
configures a second RAID group of the second RAID type by the storage drive included in the first RAID group excluding the failed storage drive, and
stores the data of the striped line of the second RAID type in the second RAID group.

6 more elements

Dependencies are inferred from the claim text.

Computer system

Life of this patent

Computer system

Life of this patent

Abstract

Claims8