Information processing system, management device, and control method

A management device, comprising:

• a processor configured to:
• determine, upon receiving a request for deletion of a first volume set in a first storage area among one or more storage areas of a first storage device among a plurality of storage devices, whether a second volume different from the first volume is set in the first storage area based on management information for managing a setting state of volumes in each of the one or more storage areas of each of the plurality of storage devices, each of the one or more volumes having an address space same as an address space of an area, in which each of the one or more volumes is set, within a storage area among the one or more storage areas;
• detect, when it is determined that the second volume is set, a continuous empty area equal to or larger than the second volume from among the one or more storage areas of a second storage device among the plurality of storage devices based on the management information;
• cause the first storage device to perform the deletion of the first volume from the first storage area;
• cause the first storage device to perform evacuation of data of the second volume to the continuous empty area;
• cause the first storage device to perform, upon completion of the evacuation, migration of the second volume by writing the data of the second volume back to a migration destination area within the first storage area from the second storage device, the migration destination area including an area in which the first volume is set before the deletion of the first volume, and
• update the management information to indicate that the first volume has been deleted and the second volume has been migrated.

A control method, comprising:

• determining by a computer, upon receiving a request for deletion of a first volume set in a first storage area among one or more storage areas of a first storage device among a plurality of storage devices, whether a second volume different from the first volume is set in the first storage area based on management information for managing a setting state of volumes in each of the one or more storage areas of each of the plurality of storage devices, each of the one or more volumes having an address space same as an address space of an area, in which each of the one or more volumes is set, within a storage area among the one or more storage areas;
• detecting, when it is determined that the second volume is set, a continuous empty area equal to or larger than the second volume from among the one or more storage areas of a second storage device among the plurality of storage devices based on the management information;
• causing the first storage device to perform the deletion of the first volume from the first storage area;
• causing the first storage device to perform evacuation of data of the second volume to the continuous empty area;
• causing the first storage device to perform, upon completion of the evacuation, migration of the second volume by writing the data of the second volume back to a migration destination area within the first storage area from the second storage device, the migration destination area including an area in which the first volume is set before the deletion of the first volume;
• and
• updating the management information to indicate that the first volume has been deleted and the second volume has been migrated.