COPYING DATA IN VIRTUAL SEQUENTIAL ACCESS VOLUMES

摘要

In one embodiment, a method is provided for copying data in a virtual sequential access volume (VSAV) among at least two computers. The method of the present invention includes the operations of: writing first data in a first VSAV, into a first storage device of a first computer; updating version information on the first VSAV, and storing the updated version information and information on a write start position of the first data, into the first storage device; transmitting the information on the write start position of the first data to a second computer; writing the first data into a second storage device of the second computer, from the write start position of the first data; and updating version information on the first VSAV, and storing the updated version information and the received information on the write start position of the first data, into the second storage device.

主权项

1. A method of copying data in a virtual sequential access volume, comprising:
a first computer writing first data in a first virtual sequential access volume received from a host, into a first virtual sequential access volume stored in a first storage device; the first computer updating version information on the first virtual sequential access volume stored in the first storage device, and storing the updated version information and information on a write start position of the first data, into the first storage device; a second computer receiving the write start position of the first data from the host; the second computer writing the first data into a first virtual sequential access volume stored in a second storage device, from the write start position of the first data; and the second computer updating version information on the first virtual sequential access volume stored in the second storage device, and storing the updated version information and the information on the write start position of the first data, into the second storage device.