| 摘要 |
PROBLEM TO BE SOLVED: To write the archive data into a disk subsystem with no intervention of a host by providing a resettable WORM function which recognizes and manages the archive data in the disk subsystem with no intervention of the backup software of a host computer. SOLUTION: A CPU 1 issues a write command group N to a single LDEV 9 and meanwhile a resettable WORM function reads a written flag and then executes a writing operation to a record after confirming that this writing operation is not over yet. Then the CPU 1 issues a write command group M to a single LDEV 9 and the WORM function reads a written flag and reports a write unable state to the CPU 1 after confirming that a writing operation is already over. Thus, it's possible to cope with the larger capacity of the archive data and also to deal with the performance and extensibility in a computer system.
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