Hard disk device having id part backup function

[Detailed Description of the Invention]

[Industrial Application] The present invention relates to a hard disk drive with ID rural district backup function, and when the ID part of hard An isk is destroyed by a certain cause especially in the system of a personal computer, it relates to the hard disk drive with ID rural district backup function which made read-out of a data division possible. Conventionally, when the ID part was destroyed by a certain cause, read-out of a data division of this kind of hard disk drive was not completed. [Problem(s) to be Solved by the Invention] Since the conventional hard disk drive mentioned above has not backed up the information on an ID part, when an ID part is destroyed by a certain cause, there is a fault that read-out of a data division cannot be performed. Although it is solvable if this is copied to a floppy disk and other file medias, such as cartridge MT, whenever the information on the ID part of a hard disk or a data division is updated, There is a fault that an operator's load is large and moreover filing devices other than a hard disk are needed. [Means for solving problem] A hard-with ID part backup function Disk device of the present invention is provided with the following. A power supply unit which supplies a power supply to a hard disk control circuit and a hard disk unit, It is a fixed mechanism which carries out time maintenance about a mechanism and the above-mentioned power supply which detect cutting of a power supply. A backup memory of CMOS, It is System about the backup memory. - A backup memory control circuit to drive and power supply for backup [Example] Next, the example of the present invention is described with reference to drawings. Drawing 1 is a block diagram of one example of the present invention. In Drawing 1, One example of the present invention is a CMOS memory. Control of backup memory control circuit 13 which performs control of battery 11 for backup for backing up, CMOS backup memory 12 which memorizes the information on the ID part of a hard disk, and CMOS backup memory 12, and a hard disk The state of electric power switch 17 of hard disk control circuit 15 to perform, power supply unit 16 which supplies the power supply of a device, and this hard disk drive, and electric power switch 17 It comprises power supply maintaining structure 19 which delays cutting of a power supply fixed time using the information from power supply cutting perception mechanism 18 and power supply cutting perception mechanism 18 which detects power supply cutting. If use of a hard disk is finished and an operator makes the cutting side electric power switch 17 of a hard disk drive, power supply cutting perception mechanism 18 will detect it, and the information that the power supply was disconnected by power supply maintaining structure 19 is sent. By hard disk control circuit 15 and backup memory control circuit 13, if Acceptance takes the information, while transmitting the information on the ID part of a hard disk to CMOS backup memory 12, power supply maintaining structure 19 will hold a power supply, and will cut after that. Thus, without being specially conscious, whenever an operator disconnects the power supply of a hard disk drive, he can back up the latest information on the ID part of a hard disk in a CMOS memory. Therefore, since it can back up and appear in a CMOS memory, the information on a certain ID part can be read and the information on a data division can be accessed when the ID part of a hard disk is destroyed by a certain cause, the reliability of a hard disk drive improves. [Effect of the Invention] As explained above, in the present invention, in a hard disk drive of a personal computer, cutting of a power supply is perceived and information on an ID part of a hard disk is backed up in a CMOS memory. Therefore, when an ID part of a hard disk is destroyed by a certain cause, it is effective in the situation of read-out of a data division becoming impossible being avoidable.

[Brief Description of the Drawings]

Drawing 1 is a block diagram showing one example of the present invention. 11 ... battery for backup, 12 ... CMOS backup memory, 13 ... backup memory control circuit, 14 ... hard disk unit, 15 ... hard disk control circuit, 16 ... power supply unit, 17 ... an electric power switch and one ... A power supply cutting perception mechanism and one ... Power supply maintaining structure.