US 2010/0306466 A1 · METHOD FOR IMPROVING DISK AVAILABILITY AND DISK ARRAY CONTROLLER

Abstract

The present invention discloses a method for improving disk availability and a disk array controller. The method includes: determining, when detecting that part of tracks of a disk in a disk array is damaged, a first master data storage space in a damaged track; selecting an idle first backup data storage space from at least one back data storage space, establishing a corresponding relation between an address of a strip contained in the first master data storage space and an address of a strip contained in the first backup data storage space; and receiving an instruction for accessing the strip contained in the first master data storage space, finding the strip contained in the first backup data storage space according to an address of the strip in the instruction and the corresponding relation, and accessing the strip contained in the first backup data storage space.

Claims16

Dependent claims

A method for improving disk availability, comprising:

accessing a strip contained in a master data storage space set in a disk array when a track in which the master data storage space is located is normal;
determining, when detecting that part of tracks of a disk in the disk array is damaged, a first master data storage space in a damaged track;
selecting an idle first backup data storage space from at least one backup data storage space, establishing a corresponding relation between an address of a strip contained in the first master data storage space and an address of a strip contained in the first backup data storage space;
and
receiving an instruction for accessing the strip contained in the first master data storage space, finding the strip contained in the first backup data storage space according to an address of the strip in the instruction and the corresponding relation, and accessing the strip contained in the first backup data storage space.

2 more elements

A disk array controller, comprising:

a disk space setting module, adapted to set at least one backup data storage space and set a master data storage space in a disk array;
an abnormity processing module, adapted to determine, when detecting that part of tracks of a disk in the disk array is damaged, a first master data storage space located in a damaged track, select an idle first backup data storage space, and store a corresponding relation between an address of a strip contained in the first master data storage space and an address of a strip contained in the first backup data storage space;
and
an access processing module, adapted to find, when receiving an instruction for accessing the strip contained in the first master data storage space, the strip contained in the first backup data storage space according to an address of the strip in the instruction and the corresponding relation;
and access the strip contained in the first backup data storage space.

2 more elements

Dependencies are inferred from the claim text.

Method for improving disk availability and disk array controller

Life of this patent

Method for improving disk availability and disk array controller

Life of this patent

Abstract

Claims16