Patent ID: 11886300
Assignee: HITACHI, LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. The backup method according to claim 8,
wherein the second storage:
creates a first virtual volume which forms a copy pair to copy data to the third volume,

wherein the third storage:
creates a third virtual volume which is paired with the fourth volume in a copy operation; and
by mapping the third virtual volume as the external source and a fifth volume of the first storage as the external destination, makes the fifth volume accessible via the third virtual volume, stores data comprising the backup image of the particular generation stored in the fourth volume in the fifth volume, and

wherein the second storage:
maps the first virtual volume as the external source and the fifth volume of the first storage as the external destination; and
stores data of the backup image of the particular generation stored in the fifth volume in the third volume via the first virtual volume.