Disk control system and control method of disk control system
First Claim
1. A control method for a disk control system for managing, as units, logical devices, the logical devices being logical storage regions defined in a storage region provided by a disk drive, said disk control system further for storing a correspondence between said logical devices and logical units, said disk control system further for receiving a process command sent from an information processing device, said disk control system further for performing processing with respect to a logical device corresponding to the logical unit specified by said process command, the control method comprising:
- 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 said logical unit a logical device when a process command has been received for said logical unit which requires data transfer with said logical unit; and
a third step of performing said process command with regard to said logical device assigned in said second step.
2 Assignments
0 Petitions
Accused Products
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.
18 Citations
8 Claims
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1. A control method for a disk control system for managing, as units, logical devices, the logical devices being logical storage regions defined in a storage region provided by a disk drive, said disk control system further for storing a correspondence between said logical devices and logical units, said disk control system further for receiving a process command sent from an information processing device, said disk control system further for performing processing with respect to a logical device corresponding to the logical unit specified by said 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 said logical unit a logical device when a process command has been received for said logical unit which requires data transfer with said logical unit; and a third step of performing said process command with regard to said logical device assigned in said second step. - View Dependent Claims (2, 3, 4)
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5. A disk control system for managing, as units, logical devices which are logical storage regions that have been set in a storage region provided by a disk drive, the disk control system comprising:
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a processor; and a memory to store a correspondence between said logical devices and logical units, which are storage regions that have been set logically; said processor configured to perform steps of; receiving a process command for a logical unit to which no logical device has been assigned, the process command having been sent from an information processing device; assigning to that logical unit a logical device, when a process command has been received for said logical unit which requires data transfer with said logical unit; and performing said process command with regard to said logical device that has been assigned in said assigning step. - View Dependent Claims (6, 7, 8)
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Specification