| 摘要 |
PURPOSE:To prevent processing contradiction from being caused at malfunction and edition when a real medium is read and processed by clarifying the relation before and after logging information blocks written on the real medium. CONSTITUTION:When it is supposed that a system-down takes place and write of the logging information from a memory buffer MB is restarted from a block 15, the content of blocks 13, 14 is lost without being written on the real medium and after system relieve leading (RIPL) takes place, new logging information is written on the real medium from the memory buffer MB as the block 15. In reading the magnetic tape MT for processing by a logging magnetic tape reference program, since '0' is set to an identification section 15b of the own block 15 regardless of '1' representing overflow display to the block 12, the possibility of mis-recognition that the overflow information is recorded from the block just before is precluded. |
