Storage system and management information acquisition method for power saving

A storage system comprising:

• a storage subsystem including one or more physical device(s), a storage region composed of at least a portion of the one or more physical device(s), and a power supply control unit for controlling the state of power supply in the physical device(s);
• a host computer including an assigned storage region assigned from the storage subsystem, and a monitor for acquiring information for management of the assigned storage region;
• and
• a management computer including a power supply control indication unit for ordering the power supply control unit to change the power supply state in the physical device(s) to ‘on’ or another state, and a notification unit for notifying the host computer of the shift in the power supply state in the physical device(s),
• wherein the host computer has a storage region information table that stores first information indicating the power supply state, including whether or not the power supply state in the storage region is ‘on,’ and second information concerning the storage region,
• wherein the monitor acquires, when acquiring the information for management of the storage region, the second information from the storage region if the power supply state in the storage region is ‘on,’ or acquires the second information stored in the storage region information table if the power supply state in the storage region is not ‘on’, and
• wherein the storage region information table contains not only the power supply state in the storage region but also the power supply state in the control unit for controlling the storage region.

A storage system comprising:

• a storage subsystem including one or more physical device(s), a storage region composed of at least a portion of the one or more physical device(s), and a power supply control unit for controlling the state of power supply in the physical device(s);
• and
• a host computer including an assigned storage region assigned from the storage subsystem, a monitor for acquiring information for management of the assigned storage region, and a power supply control indication unit for ordering the power supply control unit to change the power supply state in the physical device(s) to ‘on’ or another state,
• wherein the host computer has a storage region information table that stores first information indicating the power supply state, including whether or not the power supply state in the storage region is ‘on,’ and second information detailing a usage measurement concerning the storage region, and
• wherein the monitor acquires, when acquiring the information for management of the storage region, the second information detailing a usage measurement from the storage region if the power supply state in the storage region is ‘on,’ or acquires the second information stored in the storage region information table if the power supply state in the storage region is not ‘on’.

A method for acquiring management information for power saving in a storage system including:

• a storage subsystem including one or more physical device(s), a storage region composed of at least a portion of the one or more physical device(s), and a power supply control unit for controlling the state of power supply in the physical device(s);
• a host computer including an assigned region assigned from the storage subsystem, and a monitor for acquiring information for management of the assigned storage region;
• and a management computer including a power supply control indication unit for ordering the power supply control unit to change the power supply state in the physical device(s) to ‘on’ or another state, and a notification unit for notifying the host computer of the change of the power supply state in the physical device(s),
• the method comprising:
• checking, under the control of the monitor, whether or not the power supply state in the storage region is ‘on’ when acquiring information for management of the storage region, based on a storage region information table that stores first information indicating whether or not the power supply state in the storage region is ‘on’ and second information detailing a usage measurement concerning the storage region;
• and
• acquiring the second information detailing a usage measurement from the storage region if the power supply state in the storage region is ‘on,’ or acquiring the second information stored in the storage region information table if the power supply state in the storage region is not ‘on’.

A method for acquiring management information for power saving in a storage system in a storage system including:

• a storage subsystem including one or more physical device(s), a storage region composed of at least a portion of the one or more physical device(s), and a power supply control unit for controlling the state of power supply in the physical device(s);
• a host computer including an assigned region assigned from the storage subsystem, and a monitor for acquiring information for management of the assigned storage region;
• and a management computer including a power supply control indication unit for ordering the power supply control unit to change the power supply state in the physical device(s) to ‘on’ or another state, and a notification unit for notifying the host computer of the change of the power supply state in the physical device(s),
• the method comprising:
• checking, under the control of the monitor, whether or not the power supply state in the storage region is ‘on’ when acquiring information for management of the storage region, based on a storage region information table that stores first information indicating whether or not the power supply state in the storage region is ‘on’ and second information concerning the storage region;
• acquiring the second information from the storage region if the power supply state in the storage region is ‘on,’ or acquiring the second information stored in the storage region information table if the power supply state in the storage region is not ‘on’;
• and
• wherein the storage region information table contains not only the power supply state in the storage region but also the power supply state in a control unit for controlling the storage region.

A method for acquiring management information for power saving in a storage system including:

• a storage subsystem including one or more physical device(s), a storage region composed of at least a portion of the physical device(s), and a power supply control unit for controlling the state of power supply in the physical device(s);
• and a host computer including an assigned storage region assigned from the storage subsystem, a monitor for acquiring information for management of the assigned storage region, and a power supply control indication unit for ordering the power supply control unit to change the power supply state in the physical device(s) to ‘on’ or another state,
• the method comprising:
• checking, under the control of the monitor, whether or not the power supply state in the storage region is ‘on’ when acquiring information for management of the storage region, based on a storage region information table that stores first information indicating the power supply state, including whether or not the power supply state in the storage region is ‘on,’ and second information detailing a usage measurement concerning the storage region;
• and
• acquiring the second information detailing a usage measurement from the storage region if the power supply state in the storage region is ‘on,’ or acquiring the second information stored in the storage region information table if the power supply state in the storage region is not ‘on’.