Installation method of new storage system into a computer system
First Claim
1. A storage system installation method for installing a second storage system into a computer system which includes a host computer and a first storage system which is coupled to the host computer, wherein the first storage system includes a first physical disk device, and the second storage system includes a second physical disk device and a disk controller coupled to the second physical disk device, said storage system installation method comprising the steps of:
- coupling the second storage system to the host computer;
coupling the second storage system to the first storage system such that the second storage system can access the first storage system;
correlating a first logical device configured in at least the first physical disk device of the first storage system with a second logical device in the second storage system, the second logical device being provided to the host computer for transferring data from the host computer to the first logical device, wherein said second logical device is not assigned to any exclusive storage area of the second physical disk device of the second storage system;
defining a path between the second logical device and the host computer;
changing an access target of the host computer from the first logical device of the first storage system to the second logical device of the second storage system;
receiving a write request from the host computer to write data to the second logical device, wherein upon receiving the write request, the data is transferred by the disk controller of the second storage system to the first logical device of the first storage system; and
writing, at the first storage system, the data received from the second storage system into the first physical disk device of the first storage system related to the first logical device.
1 Assignment
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Accused Products
Abstract
A new storage unit is installed such that installation costs are suppressed and functions of the new storage unit can be utilized sufficiently. An access right is changed such that the new storage unit (second storage unit) can access an existing first storage unit (S502). A logical device relating to a storage device of the first storage unit is assigned to a logical device of the second storage unit (S503). Path definition and device recognition in a host computer are performed such that the host computer can access the assigned logical device of the second storage unit (S504, 505). Input-output setting of the host computer is changed such that processing of an input-output from the host computer to the device of the first storage unit is requested to the second storage unit (S506). Seleted figure:
180 Citations
19 Claims
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1. A storage system installation method for installing a second storage system into a computer system which includes a host computer and a first storage system which is coupled to the host computer, wherein the first storage system includes a first physical disk device, and the second storage system includes a second physical disk device and a disk controller coupled to the second physical disk device, said storage system installation method comprising the steps of:
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coupling the second storage system to the host computer; coupling the second storage system to the first storage system such that the second storage system can access the first storage system; correlating a first logical device configured in at least the first physical disk device of the first storage system with a second logical device in the second storage system, the second logical device being provided to the host computer for transferring data from the host computer to the first logical device, wherein said second logical device is not assigned to any exclusive storage area of the second physical disk device of the second storage system; defining a path between the second logical device and the host computer; changing an access target of the host computer from the first logical device of the first storage system to the second logical device of the second storage system; receiving a write request from the host computer to write data to the second logical device, wherein upon receiving the write request, the data is transferred by the disk controller of the second storage system to the first logical device of the first storage system; and writing, at the first storage system, the data received from the second storage system into the first physical disk device of the first storage system related to the first logical device. - View Dependent Claims (2, 3, 4, 5)
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6. A computer program stored on a computer readable medium and executable by a computer for installing a second storage system into a computer system which includes a first storage system and a host computer which is coupled to the first storage system, wherein the first storage system includes a disk controller and a first physical disk device, and the second storage system includes a disk controller and a second physical disk device, said computer program comprising:
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code that correlates a first logical device configured in at least the first physical disk device of the first storage system with a second logical device in the second storage system, the second logical device being provided to the host computer for transferring data from the host computer to the first logical device, wherein said second logical device is not assigned to any exclusive storage area of the second physical disk device of the second storage system; code that sets an access permission that permits an access from the second storage system to the first storage system at the first storage system; code that defines a path from the host computer to the second logical device; code that pertains to transferring data, at the disk controller of the second storage system, from the host computer with a write request which instructs the disk controller of the second storage system to write the data into the second logical device to the first storage system; and code that pertains to writing the data, by the disk controller of the first storage system, received from the second storage system into the first physical disk device of the first storage system related to the first logical device. - View Dependent Claims (7, 8, 9, 10)
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11. A method of installing a second storage system into a computer system which includes a first storage system and a host computer which is coupled to the first storage system, wherein the first storage system includes a disk controller and a first physical disk device, and the second storage system includes a disk controller and a second physical disk device, said method comprising the steps of:
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correlating a first logical device configured in at least the first physical disk devices of the first storage system with a second logical device of the second storage system, said second logical device is not assigned to any exclusive storage area of the second physical disk device of the second storage system; setting an access permission that permits an access from the second storage system to the first storage system at the first storage system; defining a path from the host computer to the second logical device; transferring data to the first storage system, at the second storage system, the data being received from the host computer, with a write command which instructs the disk controller of the second storage system to store the data into the second logical device; and writing the data, at the disk controller of the first storage system, into the first physical disk device of the first storage system related to the first logical device. - View Dependent Claims (12, 13, 14, 15)
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16. A storage system installation and data migration method for installing a second storage system between a host computer and a first storage system, wherein the first storage system includes a first physical disk device, and the second storage system includes a second physical disk device and a disk controller coupled to the at least one physical disk device, said storage system installation and data migration method comprising:
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coupling the second storage system to the host computer; coupling the second storage system to the first storage system so that the second storage system can access the first storage system; correlating a first logical device configured in at least the first physical disk device of the first storage system with a second logical device in the second storage system the second logical device being provided for transferring data from the host computer to the first logical device, and said second logical device being not assigned to any exclusive storage area of the second physical disk device of the second storage system; defining a path between the second logical device and the host computer; changing an access target of the host computer from the first logical device of the first storage system to the second logical device of the second storage system; after changing the access target, transferring data to the first storage system, the data being received at the second storage system from the host computer with a write request which instructs the disk controller of the second storage system to write the data into the second logical device; writing, at the first storage system, the data received from the second storage system into the first physical disk device of the first storage system related to the first logical device; after installation, selecting, in the second storage system, the second physical disk device of the second storage system in accordance with an instruction received by the disk controller of the second storage system; migrating data in the first logical device to the second physical disk device of the second storage system after the selection step; and after completion of the data migration, correlating the second logical device in the second storage system with the second physical disk device in the second storage system instead of the first logical device in the first storage system. - View Dependent Claims (17, 18, 19)
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Specification