Information storage medium library array apparatus, information recording method and information recording program

An information storage medium library array apparatus which records data to a plurality of write-once information storage media and a write-once alternative information storage medium which is a substitute for one of the plurality of write-once information storage media, wherein

• each of the plurality of write-once information storage media and the write-once alternative information storage medium record data continuously on tracks,
• the information storage medium library array apparatus comprising:
• a plurality of recording and reproduction devices which record data to the write-once information storage media and also reproduce data from the write-once information storage media;
• a backup recording and reproduction device which records data to the write-once alternative information storage media and also reproduces data from the write-once alternative information storage media;
• and
• a control unit which controls operations of the plurality of recording and reproduction devices and the backup recording and reproduction device, and controls the plurality of recording and reproduction devices so as to record the data, in a distributed fashion, to the plurality of write-once information storage media, wherein
• the plurality of recording and reproduction devices each record the data to the write-once information storage medium that is a recording object, of the plurality of write-once information storage media;
• the write-once information storage media installed respectively in the plurality of recording and reproduction devices constitute a disk array;
• the control unit detects that a fault has occurred in which the write-once information storage medium installed in any one of the plurality of recording and reproduction devices has become unable to perform recording;
• and
• the backup recording and reproduction device alternatively records to the write-once alternative information storage medium data that ought to be recorded to a write-once faulty information storage medium in which the occurrence of a fault has been detected by the control unit,
• when the control unit receives a reproduction request in relation to the write-once faulty information storage medium and when the area designated by the reproduction request is a recorded area of the write-once alternative information storage medium, then the control unit reproduces data from the write-once alternative information storage medium, and when the area designated by the reproduction request is an unrecorded area of the write-once alternative information storage medium and a recorded area of the write-once faulty information storage medium, then the control unit reproduces data from the write-once faulty information storage medium.

An information reproducing method for reproducing data from a plurality of write-once information storage media and a write-once alternative information storage medium which is a substitute for one of the plurality of write-once information storage media, wherein

• each of the plurality of write-once information storage media and the write-once alternative information storage medium record data continuously on tracks,
• the data is recorded to the write-once information storage medium that is a recording object, of the plurality of write-once information storage media;
• and
• data that ought to be recorded to a write-once faulty information storage medium in which the occurrence of a fault has been detected, is recorded alternatively to the write-once alternative information storage medium
• when a reproduction request is received in relation to the write-once faulty information storage medium and when the area designated by the reproduction request is a recorded area of the write-once alternative information storage medium, then data is reproduced from the write-once alternative information storage medium, and when the area designated by the reproduction request is an unrecorded area of the write-once alternative information storage medium and a recorded area of the write-once faulty information storage medium, then data is reproduced from the write-once faulty information storage medium.

A non-transitory computer readable recording medium storing an information reproduction program for reproducing data from a plurality of write-once information storage media and a write-once alternative information storage medium which is a substitute for one of the plurality of write-once information storage media, wherein

• each of the plurality of write-once information storage media and the write-once alternative information storage medium record data continuously on tracks,
• the data is recorded to the write-once information storage medium that is a recording object, of the plurality of write-once information storage media;
• and
• data that ought to be recorded to a write-once faulty information storage medium in which the occurrence of a fault has been detected, is recorded alternatively to the write-once alternative information storage medium
• the information reproduction program causing the computer to function as a reproduction unit in which, when a reproduction request is received in relation to the write-once faulty information storage medium and when the area designated by the reproduction request is a recorded area of the write-once alternative information storage medium, then data is reproduced from the write-once alternative information storage medium, and when the area designated by the reproduction request is an unrecorded area of the write-once alternative information storage medium and a recorded area of the write-once faulty information storage medium, then data is reproduced from the write-once faulty information storage medium.