Array-type disk apparatus preventing lost data and providing improved failure tolerance
First Claim
1. A storage system comprising:
- a plurality of disks including first disks configuring a RAID group and at least one second disk, wherein each of the first disks stores one of data received from a computer coupled to the storage system or parity data used for recovering the data received from the computer, and wherein the at least one second disk is to be used as a spare disk; and
a control section configured to hold an error status of each of the first disks, and to start to mirror data between one of the first disks and the at least one second disk when the error status of the one of the first disks matches a predetermined first criterion,wherein, after starting to mirror data between the one of the first disks and the at least one second disk, the control section is configured to stop mirroring data between the one of the first disks and the at least one second disk, before completing mirroring data between the one of the first disks and the at least one second disk, and start to mirror data between another one of the first disks and the at least one second disk, according to the error status of the one of the first disks and the another one of the first disks.
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Accused Products
Abstract
Disclosed is storage system, that is, an array-type disk apparatus which is provided with an error monitor section which monitors the status of error occurrence in a disk drive and instructs initiation of mirroring between the disk drive and a spare disk drive when the number of errors occurred of the disk drive exceeds a specified value, and a mirror section which performs mirroring between the disk drive and spare disk drive. Storage system, that is, the array-type disk apparatus may be provided with an error monitor section which monitors the status of error occurrence in a disk drive and gives such an instruction as to set the status of the disk drive in a temporary blocked state, and a data restoring section which executes data restoration by reading data from the temporary blocked disk drive when reading from another disk drive constituting a disk array group is not possible during data restoration.
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Citations
22 Claims
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1. A storage system comprising:
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a plurality of disks including first disks configuring a RAID group and at least one second disk, wherein each of the first disks stores one of data received from a computer coupled to the storage system or parity data used for recovering the data received from the computer, and wherein the at least one second disk is to be used as a spare disk; and a control section configured to hold an error status of each of the first disks, and to start to mirror data between one of the first disks and the at least one second disk when the error status of the one of the first disks matches a predetermined first criterion, wherein, after starting to mirror data between the one of the first disks and the at least one second disk, the control section is configured to stop mirroring data between the one of the first disks and the at least one second disk, before completing mirroring data between the one of the first disks and the at least one second disk, and start to mirror data between another one of the first disks and the at least one second disk, according to the error status of the one of the first disks and the another one of the first disks. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A storage system comprising:
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a plurality of disks including first disks configuring a RAID group and at least one second disk, wherein each of the first disks stores one of data received from a computer coupled to the storage system or parity data used for recovering the data received from the computer, and a control section configured to hold an error status of each of the first disks, and to start to mirror data between one of the first disks and the at least one second disk when the error status of the one of the first disks matches a predetermined first criterion, wherein, after starting to mirror data between the one of the first disks and the at least one second disk, the control section is configured to stop mirroring data between the one of the first disks and the at least one second disk, before completing mirroring data between the one of the first disks and the at least one second disk, and start to mirror data between another one of the first disks and the at least one second disk, according to the error status of the one of the first disks and the another one of the first disks. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification