| 摘要 |
<p>The computer of a control console of a machine, especially a printing press, with a hard-disk drive and a floppy-disk drive, is to be further developed in such a way that if the hard-disk drive fails immediate continued operation is possible. According to the invention it is provided that the computer has two hard-disk drives, but in normal operation only one hard-disk drive is the main drive. The storing and calling up of data is consequently performed only in connection with this first hard-disk drive. From time to time, either under program control or at the initiation of the user, backup copies of data of the first hard-disk drive are created on the second hard-disk drive. After failure of the first hard-disk drive (main drive), the computer can be switched over to the second hard-disk drive during booting after loading a special floppy disk, i.e. the user can continue to operate the machine by means of the control-console computer with this second hard-disk drive and the data updated by the last backup. After restoring the defective hard-disk drive or after fitting a new hard-disk drive, a transfer back of the data generated in the meantime on the second hard-disk drive to the new hard-disk drive is performed. This is expediently initiated again by part of a program on a floppy disk, which is to be loaded into the floppy-disk drive when the control-console computer is put into operation.</p> |
