Path maintenance mechanism
First Claim
1. A computer system, comprising:
- at least one host computer including a processor, a memory, and an interface; and
at least one storage system coupled to the host computer,wherein the storage system comprises a physical disk which stores data requested to be written by the host computer and a disk controller which controls the physical disk, and provides the host computer with a storage area of the physical disk as at least one logical unit,wherein the processor obtains, at a first time point and a second time point different from the first time point, a relation between a logical path serving as an access route from the host computer to the logical unit and a component through which the logical path passes,wherein the processor stores, as logical path connection information, the relations obtained at the first time point and the second time point,wherein the processor refers to the logical path connection information to compare the logical paths existing at the first time point and the logical paths existing at the second time point with each other, andwherein the processor specifies the logical path which does not exist at the second time point among the logical paths existing at the first time point.
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Accused Products
Abstract
In the computer system including a host computer and a storage system, the storage system includes a physical disk and a disk controller, and provides a storage area of the physical disk as at least one logical unit. The processor obtains, at a first time point and a second time point different from the first time point, a relation between a logical path and a component through which the logical path passes, stores, as logical path connection information, the relations obtained at the first time point and the second time point, refers to the logical path connection information to compare the logical paths existing at the first time point and the logical paths existing at the second time point with each other, and specifies the logical path which does not exist at the second time point among the logical paths existing at the first time point.
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Citations
20 Claims
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1. A computer system, comprising:
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at least one host computer including a processor, a memory, and an interface; and at least one storage system coupled to the host computer, wherein the storage system comprises a physical disk which stores data requested to be written by the host computer and a disk controller which controls the physical disk, and provides the host computer with a storage area of the physical disk as at least one logical unit, wherein the processor obtains, at a first time point and a second time point different from the first time point, a relation between a logical path serving as an access route from the host computer to the logical unit and a component through which the logical path passes, wherein the processor stores, as logical path connection information, the relations obtained at the first time point and the second time point, wherein the processor refers to the logical path connection information to compare the logical paths existing at the first time point and the logical paths existing at the second time point with each other, and wherein the processor specifies the logical path which does not exist at the second time point among the logical paths existing at the first time point. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A logical path difference detecting method for a computer system,
the computer system comprising: -
at least one host computer including a processor, a memory, and an interface; and at least one storage system coupled to the host computer, the storage system comprising a physical disk which stores data requested to be written by the host computer and a disk controller which controls the physical disk, the method comprising; providing, by the storage system, the host computer with a storage area of the physical disk as at least one logical unit; obtaining, by the host computer, at a first time point and a second time point different from the first time point, a relation between a logical path serving as an access route from the host computer to the logical unit and a component through which the logical path passes; storing, by the host computer, as logical path connection information, the relations obtained at the first time point and the second time point; referring, by the host computer, to the logical path connection information to compare the logical paths existing at the first time point and the logical paths existing at the second time point with each other; and specifying, by the host computer, the logical path which does not exist at the second time point among the logical paths existing at the first time point. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A logical path difference detecting method for a computer system,
the computer system comprising: -
at least one host computer including a processor, a memory, and an interface; at least one storage system coupled to the host computer; and a management computer comprising a processor, a memory, and an interface and being coupled to the host computer, the storage system comprising a physical disk which stores data requested to be written by the host computer and a disk controller which controls the physical disk, the method comprising; providing, by the storage system, the host computer with a storage area of the physical disk for as at least one logical unit; obtaining, by the management computer, at a first time point and a second time point different from the first time point, a relation between a logical path serving as an access route from the host computer to the logical unit and a component through which the logical path passes; storing, by the management computer as logical path connection information, the relations obtained at the first time point and the second time point; referring, by the management computer to the logical path connection information to compare the logical paths existing at the first time point and the logical paths existing at the second time point with each other; and specifying, by the management computer the logical path which does not exist at the second time point among the logical paths existing at the first time point. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification