Storage unit, installation method thereof and installation program therefore

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 (S 502 ). A logical device relating to a storage device of the first storage unit is assigned to a logical device of the second storage unit (S 503 ). 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 (S 504, 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 (S 506 ).

1 . (canceled)  
   
   
       2 . A method in a system which includes a computer, a first storage system coupled to the computer, and a virtualization device coupled to the computer and the first storage system which executes an Input/Output (I/O) operation in accordance with a first I/O request received at the virtualization device for a logical volume in the virtualization device, said method comprising: 
 receiving, at the virtualization device, configuration information of a first volume in the first storage system from the first storage system;    assigning the logical volume in the virtualization device to the first volume in the first storage system by using the configuration information received at the virtualization device;    making an access path from the computer to the first volume in the first storage system via the virtualization device;    correlating, if data stored in the first volume in the first storage system are to be moved to another storage device, the logical volume in the virtualization device with a second volume in the another storage device; and    moving the data from the first volume in the first storage system to the second volume in the another storage device.    
   
   
       3 . A method according to  claim 2 , further comprising: 
 in making the access path, making a second access path from the virtualization device to the first storage system included in the access path so as to permit the virtualization device to access the first volume in the first storage system via the second access path; and    sending, from the virtualization device, a second I/O request corresponding to the first I/O request sent from the computer to the first volume in the first storage system via the second access path.    
   
   
       4 . A method according to  claim 2 , further comprising: 
 executing the I/O operation by the first storage system after making the access path.    
   
   
       5 . A method in a system which includes a computer, a first storage system coupled to the computer, and a virtualization device coupled to the computer and the first storage system, said method comprising: 
 providing a plurality of logical devices in the virtualization device, each of the logical devices being a virtualized volume;    selecting a first logical device among the plurality of logical devices;    receiving, at the virtualization device, configuration information of a first volume in the first storage system from the first storage system;    setting the configuration information of the first volume in the first storage system to the first logical device in the virtualization device;    making an access path from the computer to the first volume in the first storage system via the virtualization device;    executing an Input/Output (I/O) operation corresponding to a first I/O request received at the virtualization device for the first logical device in the virtualization device;    correlating, if data stored in the first volume in the first storage system are to be moved to another storage device, the first logical device in the virtualization device with a second volume in the another storage device; and    moving the data from the first volume in the first storage system to the second volume in the another storage device.    
   
   
       6 . A method in a system which includes a computer, a first storage system coupled to the computer, a second storage system and a virtualization device coupled to the computer, the first storage system and the second storage system, said method comprising: 
 providing a plurality of logical device numbers in the virtualization device, each of the logical device numbers representing a virtualized volume in the virtualization device;    selecting a first logical device number among the plurality of logical device numbers;    receiving, at the virtualization device, configuration information of a first volume in the first storage system from the first storage system;    setting a first logical device number in the virtualization device to the configuration information received at the virtualization device;    making an access path from the computer to the first volume in the first storage system via the virtualization device;    executing an Input/Output (I/O) operation corresponding to a first I/O request received at the virtualization device including the first logical device number;    correlating, if data stored in the first volume in the first storage system are to be moved to the second storage system, the first logical device number in the virtualization device with a second volume in the second storage system; and    moving the data from the first volume in the first storage system to the second volume in the second storage system.    
   
   
       7 . A method in a system which includes a computer, a first storage system coupled to the computer, and a virtualization device coupled to the computer and a first storage system, the first storage system which executes an Input/Output (I/O) operation in accordance with a first I/O request received at the virtualization device including a first logical device number in the virtualization device, said method comprising: 
 receiving, at the virtualization device, configuration information of a first volume in the first storage system from the first storage system;    setting the configuration information of the first volume in the first storage system to the logical device number in the virtualization device;    making an access path from the computer to the first volume in the first storage system via the virtualization device;    correlating, if data stored in the first volume in the first storage system are to be moved to another storage device, the logical volume number in the virtualization device with a second volume in the another storage device; and    moving the data from the first volume in the first storage system to the second volume in the another storage device.    
   
   
       8 . A method in a system which includes a computer, a first storage system coupled to the computer, a second storage system, and a virtualization device coupled to the computer, the first storage system and the second storage system, the first storage system which executes an Input/Output (I/O) operation in accordance with a first I/O request received at the virtualization device for a logical volume in the virtualization device, said method comprising: 
 receiving, at the virtualization device, configuration information of a first volume in the first storage system from the first storage system;    assigning the logical volume in the virtualization device to the first volume in the first storage system by using the configuration information received at the virtualization device;    making an access path from the computer to the first volume in the first storage system via the virtualization device;    correlating, if data stored in the first volume in the first storage system are to be moved to the second storage system, the logical volume in the virtualization device with a second volume in the second storage system; and    moving the data from the first volume in the first storage system to the second volume in the second storage system.    
   
   
       9 . A method according to  claim 5 , further comprising: 
 in making the access path, making a second access path from the virtualization device to the first storage system so as to permit the virtualization device to access to the first volume in the first storage system via the second access path; and    sending, from the virtualization device, a second I/O request corresponding to the first I/O request sent from the computer to the first volume in the first storage system via the second access path.    
   
   
       10 . A method according to  claim 6 , further comprising: 
 in making the access path, making a second access path from the virtualization device to the first storage system so as to permit the virtualization device to access to the first volume in the first storage system via the second access path; and    sending, from the virtualization device, a second I/O request corresponding to the first I/O request sent from the computer to the first volume in the first storage system via the second access path.    
   
   
       11 . A method according to  claim 7 , further comprising: 
 in making the access path, making a second access path from the virtualization device to the first storage system so as to permit the virtualization device to access to the first volume in the first storage system via the second access path; and    sending, from the virtualization device, a second I/O request corresponding to the first I/O request sent from the computer to the first volume in the first storage system via the second access path.    
   
   
       12 . A method according to  claim 8 , further comprising: 
 in making the access path, making a second access path from the virtualization device to the first storage system so as to permit the virtualization device to access to the first volume in the first storage system via the second access path; and    sending, from the virtualization device, a second I/O request corresponding to the first I/O request sent from the computer to the first volume in the first storage system via the second access path.