DATA CONTROL SYSTEM, SHARED DISK DRIVE, AND METHOD OF SWITCHING DISK ACCESS CONTROL USED FOR THEM

摘要

PPROBLEM TO BE SOLVED: To provide a data control system capable of improving reliability in a system, and reducing time for switching into a standby system. PSOLUTION: Disk drives (#1, #2) 12, 13 used by service servers (#1, #2) 3, 4, being active systems, respectively, are also previously mounted on a service server (#3) 5 being a standby system, and the disk drives (#1, #2) 12, 13 are made to remain accessible from the service server (#3) 5 being the standby system. A shared disk controller 11 of a shared disk drive 1 achieves an exclusive control on the disk drives (#1, #2) 12, 13 in the shared disk drive 1 regardless of operation at sides of the service servers (#1-#3) 3-5. PCOPYRIGHT: (C)2007,JPO&INPIT