Storage controller, storage control system, and storage control method
AssigneeHitachi, Ltd.
InventorsSeiichi HIGAKI, Hisao HONMA
Life of this patent
Estimating the term…
Abstract
There is provided a storage control system and a method in which various controls to a plurality of storage controllers connected to each other can be effectively performed. The storage control system and method controls first and second storage controllers, in which a second storage controller is connected to a first storage controller to which a host system is connected. With reference to a memory in which a table defining correspondence relationships between internal logical volumes and a host logical volume of the second storage controller is stored, a channel adapter of the first storage controller controls power supplies of driving mechanisms of storage devices corresponding to the internal logical volumes.
Claims24
A storage system coupled to a host computer comprising:
- a plurality of first hard disk drives (HDDs) on which a first internal logical volume is configured;
- a plurality of second HDDs on which a second internal logical volume is configured;
- and
- a controller being configured to control said plurality of first HDDs as a first error check and correction (ECC) group, and control said plurality HDDs as a second ECC group, and to provide a first logical volume associated with said first internal logical volume;
- wherein said controller is configured to write data, which is requested to write to said first logical volume by the host computer, to said associated first internal logical volume, and
- wherein said controller is configured to switch association between said first logical volume and said first internal logical volume to association between said first logical volume and said second internal logical volume, and then stop power supply to said plurality of first HDDs on which said first internal logical volume is configured.
A storage system coupled to a host computer comprising:
- a plurality of first storage devices on which a first internal logical volume is configured;
- a plurality of second storage devices on which a second internal logical volume is configured;
- and
- a controller being configured to control said plurality of first storage devices as a first RAID group, and control said plurality of second storage devices as a second RAID group and to provide a first logical volume being associated with said first internal logical volume;
- wherein said controller is configured to write data, which is requested to write to said first logical volume by the host computer, to said associated first internal logical volume, and
- wherein said controller is configured to switch association between said first logical volume and said first internal logical volume to association between said first logical volume and said second internal logical volume, and then change a state of said plurality of first storage devices to a power saving mode.
A method for operating a storage system coupled to a host computer, said storage system including:
- a plurality of first hard disk drives (HDDs) on which a first internal logical volume is configured;
- a plurality of second HDDs on which a second internal logical volume is configured;
- and a controller being configured to control said plurality of first HDDs as a first error check and correction (ECC) group, and control said plurality HDDs as a second ECC group, and to provide a first logical volume associated with said first internal logical volume, said method comprising:
- writing data, via said controller, which is requested to write to said first logical volume by the host computer, to said associated first internal logical volume;
- switching association, via said controller, between said first logical volume and said first internal logical volume to association between said first logical volume and said second internal logical volume;
- and
- stopping power supply to said plurality of first HDDs on which said first internal logical volume is configured after switching said association.
A method for operating a storage system coupled to a host computer, said storage system including:
- a plurality of first storage devices on which a first internal logical volume is configured;
- a plurality of second storage devices on which a second internal logical volume is configured;
- and a controller being configured to control said plurality of first storage devices as a first RAID group, and control said plurality of second storage devices as a second RAID group and to provide a first logical volume being associated with said first internal logical volume;
- said method comprising:
- writing data, via said controller, which is requested to write to said first logical volume by the host computer, to said associated first internal logical volume;
- and
- switching association, via said controller, between said first logical volume and said first internal logical volume to association between said first logical volume and said second internal logical volume;
- and
- changing a state of said plurality of first storage devices to a power saving mode after switching said association.
Dependencies are inferred from the claim text.