Disk control system and control method of disk control system
First Claim
1. A disk control system that receives a process command for writing or reading of data from an information processing device, and performs a write or read process of data with respect to a logical device corresponding to a logical unit specified by that process command, comprising:
- means for managing, as units, logical devices, which are logical storage regions that have been set in a storage region provided by a disk drive;
means for storing a correspondence between said logical devices and logical units, which are storage regions that have been set logically;
means for assigning, when a process command has been received for a logical unit to which no logical device has been assigned, a logical device to that logical unit and performing processing with regard to that logical device; and
means for responding to said information processing device, when a process command that does not cause a process with regard to a logical device has been received from said information processing device, by performing a process corresponding to that process command without performing said assignment.
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Abstract
In order to assign logical devices efficiently to logical units, a disk control system that receives a process command for writing or reading of data from an information processing device, and performs a write or read process of data with respect to a logical device corresponding to a logical unit specified by that process command, includes means for managing logical devices, which are logical storage regions that have been set in a storage region provided by a disk drive, means for storing a correspondence between logical units, which are storage regions that have been set logically, and the logical devices, and means for assigning, when a process command has been received for a logical unit to which no logical device has been assigned, a logical device to that logical unit and performing processing with regard to that logical device.
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Citations
2 Claims
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1. A disk control system that receives a process command for writing or reading of data from an information processing device, and performs a write or read process of data with respect to a logical device corresponding to a logical unit specified by that process command, comprising:
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means for managing, as units, logical devices, which are logical storage regions that have been set in a storage region provided by a disk drive;
means for storing a correspondence between said logical devices and logical units, which are storage regions that have been set logically;
means for assigning, when a process command has been received for a logical unit to which no logical device has been assigned, a logical device to that logical unit and performing processing with regard to that logical device; and
means for responding to said information processing device, when a process command that does not cause a process with regard to a logical device has been received from said information processing device, by performing a process corresponding to that process command without performing said assignment.
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2. A control method for a disk control system that manages, as units, logical devices, which are logical storage regions that have been set in a storage region provided by a disk drive, that stores a correspondence between said logical devices and logical units, which are storage regions that have been set logically, that receives a process command that has been sent from an information processing device, and that performs processing with respect to a logical device corresponding to the logical unit specified by that process command, the control method comprising:
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a first step of receiving a process command for a logical unit to which no logical device has been assigned;
a second step of assigning to that logical unit a logical device, when in said first step a process command has been received for a logical unit to which no logical device has been assigned; and
a third step of performing said process command with regard to the logical device that has been assigned in said second step.
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Specification