Storage system and rebuilding method for storage system
AssigneeHitachi, Ltd.
InventorsSho Sawada, Hidenori Suzuki, Eiju Katsuragi, Shintarou Inoue, Hiroki Fujii
Life of this patent
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Abstract
A storage controller of a storage system performs, when failures occur in at least two drives, priority rebuilding and normal rebuilding in parallel, the priority rebuilding being performed so as to perform rebuilding using a reading drive for reading data for restoration of priority rebuild data to be preferentially rebuilt and a writing drive specified for writing the priority rebuild data restored, the normal rebuilding being performed so as to rebuilt normal rebuild data by using a specified reading drive and a specified writing drive.
Claims11
A storage system comprising a plurality of drives and a processor configured to construct a distributed RAID including the drives,
- wherein the processor is configured to perform, in rebuilding which is performed when failures occur in at least two drives of the plurality of drives and in which data stored in the at least two drives in which the failures occur is restored to another drive of the plurality of drives, priority rebuilding and normal rebuilding in parallel, the priority rebuilding being performed such that priority rebuild data to be preferentially rebuilt is selected and then is rebuilt using a reading drive specified for reading the data for restoration of the priority rebuild data and a writing drive specified for writing the priority rebuild data restored, the normal rebuilding being performed such that normal rebuild data that is the data other than the priority rebuild data is rebuilt using a specified reading drive and a specified writing drive.
A rebuilding method in a storage system comprising a plurality of drives and a processor configured to construct a distributed RAID including the drives, the rebuilding method comprising:
- performing, in rebuilding which is performed when failures occur in at least two drives of the plurality of drives and in which data stored in the at least two drives in which the failures occur is restored to another drive of the plurality of drives, priority rebuilding and normal rebuilding in parallel, the priority rebuilding being performed such that priority rebuild data to be preferentially rebuilt is selected and then is rebuilt using a reading drive specified for reading the data for restoration of the priority rebuild data and a writing drive specified for writing the priority rebuild data restored, the normal rebuilding being performed such normal rebuild data that is the data other than the priority rebuild data is rebuilt using a specified reading drive and a specified writing drive.
Dependencies are inferred from the claim text.