| 摘要 |
<p>Data in a management region of a tape are reliably restored by a retry processing even when a read error occurs due to scratches on the tape. A physical ID with an initial value of 4000ID from PBOT is set to -1600ID (Fig. 19A) after normal VSIT write, to -1700ID after the first retry (Fig. 19B) and to -1800ID after the second retry (Fig 19C), and it decreases by 100ID after each retry. In contrast, VSIT is always written from 0ID. In this way, in the retry processing of VSIT, the physical ID of the start position does not change, and the actual write position, that is, the distance from PBOT, can be changed. Therefore, even when the error of VSIT write occurs due to scratches of the tape, for example, the VSIT write error can be restored by this retry processing.</p> |
