Patent ID: 11880580
Assignee: DELL PRODUCTS L.P.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A federated multi-appliance data storage system configured and operative to provide data storage services to a virtual-computing host computer, the data storage services including non-disruptively migrating a virtual volume from a first data storage appliance of the system to a second data storage appliance of the system by:
in a synchronizing phase, copying data from a source virtual volume of the first data storage appliance to a destination virtual volume of the second data storage appliance, the destination virtual volume being not mapped and the host computer having no path to the destination virtual volume during the synchronizing phase; and
upon completing the synchronizing phase, (1) creating a mapping to the destination virtual volume for the host computer and signaling the mapping to the host computer by sending a notification, the notification having an associated log page retrievable by the host computer, (2) determining whether the host computer has subsequently retrieved the log page, (3) in response to determining that the host computer has subsequently retrieved the log page, performing a cutover operation making the destination virtual volume accessible to the host computer and making the source virtual volume inaccessible to the host computer, and (4) in response to determining that the host computer has not subsequently retrieved the log page, refraining from performing the cutover operation thereby leaving the destination virtual volume inaccessible to the host computer.