Disk array system and method of controlling disk array system
First Claim
1. A storage system, comprising:
- a controller controlling to write data to a plurality of storage regions and to read data from said storage regions; and
a plurality of disk drives coupled to said controller having said storage regions, wherein said controller compares contents corresponding to data written to a storage region of said storage regions in said storage regions and data read from said storage region, said contents being stored in said controller until said comparison at the earliest, after receiving a write request in said controller.
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Abstract
A disk array system having first and second housings and a controller for controlling the first and second housings. Fiber channel hard disk drives are received in the first housing, and serial ATA hard disk drives are received in the second housing. When reading data stored in a serial ATA hard disk drive in the second housing, the controller reads a plurality of pieces of data including the data to be read and parity data for the plurality of pieces of data from all the hard disk drives of an RAID group to which the hard disk drive storing the data to be read belongs. Thus, the controller examines whether the plurality of pieces of data including the data to be read are written in the hard disk drives with erroneous contents or not.
143 Citations
20 Claims
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1. A storage system, comprising:
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a controller controlling to write data to a plurality of storage regions and to read data from said storage regions; and
a plurality of disk drives coupled to said controller having said storage regions, wherein said controller compares contents corresponding to data written to a storage region of said storage regions in said storage regions and data read from said storage region, said contents being stored in said controller until said comparison at the earliest, after receiving a write request in said controller. - 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 controller controlling to write data to a plurality of storage regions and to read data from said storage regions; and
a plurality of disk drive units coupled to said controller having a plurality of disk drives corresponding to said storage regions and having a memory which temporarily store data from said controller to said disk drives, one of said disk drive units replies to said controller according to storing data to said memory, wherein said controller controls said one of said disk drive units to write data stored in said memory in one of said disk drive units to a storage region of said storage regions in said one of disk drive units and compares contents corresponding to said data written to said storage region and data read from said storage region, said contents are stored in said controller until said comparison at the earliest. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification