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    • 2. 发明授权
    • Method and system for maintaining directory consistency in magneto-optic
media
    • 维护磁光媒体目录一致性的方法和系统
    • US5337197A
    • 1994-08-09
    • US089365
    • 1993-07-09
    • Lawrence S. BrownDouglas W. DeweyTharon Hall
    • Lawrence S. BrownDouglas W. DeweyTharon Hall
    • G06F3/08G06F3/06G11B7/00G11B7/004G11B7/0055G11B11/10G11B11/105G11B20/12G11B20/18G11B27/00G11B27/32G11B5/09H04N5/76
    • G06F3/0601G11B20/1252G11B27/329G06F2003/0697G11B20/1879G11B2220/2525
    • The invention provides a system and method for making a data update, such as a directory update, to a magneto-optic disk which includes: copying designated directory sectors from the disk to a cache buffer, the designated directory sectors containing the portion of the directory which is to be updated; updating the directory portion to be updated in the cache buffer to provide an updated directory portion; writing the updated directory portion to a directory consistency block on the disk so as to provide a backup of the updated directory portion; erasing the designated directory sectors from the disk; writing the updated directory portion from the cache buffer to the designated directory sectors; verifying that the updated directory portion has been written to the designated directory sectors on the disk; and erasing the directory consistency block if there is verification that the updated directory portion has been written to the designated directory sectors on the disk. The system and method may further include recovery of the updated directory portion from the directory consistency block if the updated directory portion has not been written to the designated directory sectors, which would be evident from the non-erased state of the directory consistency block.
    • 本发明提供了一种用于对磁光盘进行诸如目录更新的数据更新的系统和方法,其包括:将指定的目录扇区从盘复制到高速缓冲存储器,指定的目录扇区包含目录的一部分 这是要更新的; 更新要在高速缓存缓冲器中更新的目录部分以提供更新的目录部分; 将更新的目录部分写入到磁盘上的目录一致性块,以便提供更新的目录部分的备份; 从磁盘擦除指定的目录扇区; 将更新的目录部分从高速缓冲存储器写入指定的目录扇区; 验证更新的目录部分是否被写入到盘上的指定目录扇区; 并且如果存在更新的目录部分已被写入到盘上的指定目录扇区的确认,则擦除目录一致性块。 如果更新的目录部分尚未被写入指定的目录扇区,则系统和方法还可以包括从目录一致性块恢复更新的目录部分,这从目录一致性块的未擦除状态将是显而易见的。