Method and apparatus for storage migration
First Claim
1. A computer system comprising:
- a first storage subsystem, a second storage subsystem, and a computer device which are connected via a network;
wherein the first storage subsystem has a first port name for a first port through which a first volume in the first storage subsystem has I/O connection with the computer device, the first port name being a unique port name;
wherein the second storage subsystem defines a first virtual volume which is associated with the first volume in the first storage subsystem, and a first virtual port associated with the first virtual volume, the first virtual port having a first virtual port name that is identical to the first port name of the first port in the first storage subsystem;
wherein the second storage subsystem is configured to activate the first virtual port associated with the first virtual volume to register the first virtual port to the network; and
wherein the computer device is configured, after activation of the first virtual port, to switch I/O connection for the first volume from the first storage subsystem to the second storage subsystem via the network using the first virtual port name on the second storage subsystem.
1 Assignment
0 Petitions
Accused Products
Abstract
Embodiments of the invention provide a method and apparatus for storage subsystem migration without re-configuration of the I/O path. In one embodiment, a computer system comprises a first storage subsystem, a second storage subsystem, and a computer device connected via a network. The first storage subsystem has a first port name for a first port through which a first volume in the first storage subsystem has I/O connection with the computer device. The second storage subsystem defines a first virtual volume which is associated with the first volume, and a first virtual port having a first virtual port name that is identical to the first port name. After activation of the first virtual port, the computer device switches I/O connection for the first volume from the first storage subsystem to the second storage subsystem via the network using the first virtual port name on the second storage subsystem.
-
Citations
22 Claims
-
1. A computer system comprising:
-
a first storage subsystem, a second storage subsystem, and a computer device which are connected via a network; wherein the first storage subsystem has a first port name for a first port through which a first volume in the first storage subsystem has I/O connection with the computer device, the first port name being a unique port name; wherein the second storage subsystem defines a first virtual volume which is associated with the first volume in the first storage subsystem, and a first virtual port associated with the first virtual volume, the first virtual port having a first virtual port name that is identical to the first port name of the first port in the first storage subsystem; wherein the second storage subsystem is configured to activate the first virtual port associated with the first virtual volume to register the first virtual port to the network; and wherein the computer device is configured, after activation of the first virtual port, to switch I/O connection for the first volume from the first storage subsystem to the second storage subsystem via the network using the first virtual port name on the second storage subsystem. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A computer system comprising:
-
a first storage subsystem, a second storage subsystem, a third storage subsystem, and a computer device which are connected via a network; wherein the first storage subsystem has a first port name for a first port through which a first volume in the first storage subsystem has I/O connection with the computer device, the first port name being a unique port name; wherein the second storage subsystem (SS2) includes a first SS2 virtual volume which is associated with the first volume in the first storage subsystem, and a first SS2 port having a first SS2 port name for I/O connection of the first SS2 virtual volume with the computer device via the network; wherein the third storage subsystem (SS3) defines a first SS3 virtual volume which is associated with the first volume in the first storage subsystem, and a first SS3 virtual port associated with the first SS3 virtual volume, the first SS3 virtual port having a first SS3 virtual port name that is identical to the first SS2 port name of the first SS2 virtual port in the second storage subsystem; wherein the third storage subsystem is configured to activate the first SS3 virtual port associated with the first SS3 virtual volume to register the first SS3 virtual port to the network; and wherein the computer device is configured, after activation of the first SS3 virtual port, to switch I/O connection for the first volume from the second storage subsystem to the third storage subsystem via the network using the first SS3 virtual port name on the third storage subsystem. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. In a computer system which includes a first storage subsystem, a second storage subsystem, and a computer device that are connected via a network;
- wherein the first storage subsystem has a first port name for a first port through which a first volume in the first storage subsystem has I/O connection with the computer device, the first port name being a unique port name;
a method for storage subsystem migration without re-configuration of the I/O path, the method comprising;defining in the second storage subsystem a first virtual volume which is associated with the first volume in the first storage subsystem, and a first virtual port associated with the first virtual volume, the first virtual port having a first virtual port name that is identical to the first port name of the first port in the first storage subsystem; activating the first virtual port associated with the first virtual volume of the second storage subsystem to register the first virtual port to the network; and after activation of the first virtual port, switching I/O connection of the computer device for the first volume from the first storage subsystem to the second storage subsystem via the network using the first virtual port name on the second storage subsystem. - View Dependent Claims (16, 17, 18)
- wherein the first storage subsystem has a first port name for a first port through which a first volume in the first storage subsystem has I/O connection with the computer device, the first port name being a unique port name;
-
19. In a computer system which includes a first storage subsystem, a second storage subsystem, a third storage subsystem, and a computer device that are connected via a network;
- wherein the first storage subsystem has a first port name for a first port through which a first volume in the first storage subsystem has I/O connection with the computer device, the first port name being a unique port name; and
wherein the second storage subsystem (SS2) includes a first SS2 virtual volume which is associated with the first volume in the first storage subsystem, and a first SS2 port having a first SS2 port name for I/O connection of the first SS2 virtual volume with the computer device via the network;
a method for storage subsystem migration without re-configuration of the I/O path, the method comprising;defining in the third storage subsystem (SS3) a first SS3 virtual volume which is associated with the first volume in the first storage subsystem, and a first SS3 virtual port associated with the first SS3 virtual volume, the first SS3 virtual port having a first SS3 virtual port name that is identical to the first SS2 port name of the first SS2 virtual port in the second storage subsystem; activating the first SS3 virtual port associated with the first SS3 virtual volume of the third storage subsystem to register the first SS3 virtual port to the network; and after activation of the first SS3 virtual port, switch I/O connection of the computer device for the first volume from the second storage subsystem to the third storage subsystem via the network using the first SS3 virtual port name on the third storage subsystem. - View Dependent Claims (20, 21, 22)
- wherein the first storage subsystem has a first port name for a first port through which a first volume in the first storage subsystem has I/O connection with the computer device, the first port name being a unique port name; and
Specification