An arrayed recording apparatus

摘要

Each of the SCSI controllers SC0 - SC4 in the arrayed recording apparatus connects to a driver/receiver DR0 - DR4 and further connects to spare disk drives SP0 - SP2. Each of the SCSI controllers accesses the spare disk drive by setting a receive/enable signal effective to the driver/receiver. Unused ID numbers are assigned to the spare disks. If a disk drive develops a fault, the RAID controller RC requests the SCSI controller to replace the faulty disk drive with the spare disk drive. It is possible to attain the function of the hot stand-by system without a specific spare SCSI controller. Other embodiments are shown in figs 8 to 17. The embodiments of figs 15 to 17 show arrangements in which a faulty disc is replaced by portions of spare discs.