Patent ID: 11861205
Assignee: HITACHI, LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. The distributed storage system according to claim 8, wherein when at least one snapshot volume in the some snapshot volumes migrated to the second computer is a restoration object, and when a reference destination region of at least one volume region in the one snapshot volume is a volume region in a volume of the third computer,
the fourth computer returns the at least one snapshot volume to the third computer,
when a reference destination of a volume region in the returned at least one snapshot volume is the volume region in the volume of the third computer, the third computer changes the reference destination to the storage region in the physical storage region based on the snapshot mapping data, and
after that, the at least one snapshot volume is restored and becomes a migration object from the third computer to the fourth computer.