| 摘要 |
<p>The present invention provides a method for selectively storing duplicate copies (16(a, b, c)) of a virtual data volume file onto more than one multiple volume cartridge (MVC) (14(a)-14(n)) based upon a copy indicator provided with a data volume file at the meta data file level. If access is subsequently lost to the main MVC as a result of hardware or tape failure, any copied data stored thereon is automatically recovered by accessing an MVC holding a copy of the data volume file. Thus, the amount of data which could be possibly lost is minimized without otherwise compromising the efficiency and flexibility provided by a multiple virtual volume data storage arrangement.</p> |
