Patent ID: 7093068

Claim:
A storage control system connected to a higher-level device, comprising: a plurality of channel adapters that are connected to the higher-level device and that receive data from said higher-level device; one or a plurality of memory portions that are connected to said plurality of channel adapters to save data exchanged with said higher-level device and control information related to said data; a plurality of disk adapters that are connected to said memory portions and that control to write said data into said memory portions, or control to read said data from said memory portions; and a plurality of disk drives that are connected to said plurality of disk adapters and that store said data under the control of said plurality of disk adapters, wherein a first channel adapter included in said plurality of channel adapters provides to said higher-level device a plurality of first logical volumes generated based on storage areas of a plurality of first disk drives included in said plurality of disk drives, and, when there is a write access of said data from said higher-level device to a first logical volume selected from said plurality of first logical volumes, said data is written to a storage area in a memory portion that has been secured in advance; and a second channel adapter included in said plurality of channel adapters manages a plurality of second logical volumes generated based on storage areas of a plurality of second disk drives included in said plurality of disk drives, and, when information relating to a third logical volume provided to said higher-level device is received from said higher-level device, if write access of said data from said higher-level device to said third logical volumes has occurred, secures an area equivalent to a size of said data in said memory portion necessary as a second logical volume corresponding to said third logical volume, writes said data to said secured area, and releases the second logical volume corresponding to said third logical volume.