Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
1998-09-02
2001-02-20
Iqbal, Nadeem (Department: 2785)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C713S152000
Reexamination Certificate
active
06192488
ABSTRACT:
The present invention relates to a restoring method for hard disk, more particularly, to a real-time restoring method for hard disk.
The usage of computer is popular in modem life either for business or for household application However, the software becomes bulky and complicated such that the system is easy to breakdown for careless usage. Moreover, the risk of breakdown of hard disk is still high because there is still no perfect method for defense the attack of virus.
To minimize the cost of data lost, an approach is to use storage means to back-up the data, such as floppy disk, MO or CDROM. However, this approach becomes cumbersome as the size of data increases. Alternatively, hard disk protection means realized by hard ware solution has been proposed. However, the protection scheme is hard to update due to the hardware nature thereof.
It is an object of the present invention to provide a real-time restoring method for hard disk and execution of the inventive method will not occupy hard disk space, therefore the inventive method provide more convenient way to protect hard disk data for computer user, especially for novice user.
To accomplish the above object, the restoring method according to the present invention comprises following steps
(1) Scanning the partition and file allocation table (FAT) of hard disk and recording above information in a plurality of flag regions on end portion of hard disk wherein each flag region contains flag for indicating the accessibility of sector in hard disk and pointer association to other flag;
(2) Replacing the INT
13
of BIOS with a modified MYINT
13
to handle the reading and writing operation of data; wherein the modified MYINT
13
can find a writable location by referring to the flag region and the privilege of user and invoke the original INT
13
to execute the real reading and writing operation. By above steps, the writing operation to a location containing data can be prevented, and the data accessed by other user in a multi-user mode can also be prevented. The data in hard disk can be restored by initializing the disk with the flag region located at end portion of the hard disk in case that the system is down or the partition of FAT of hard disk has been infringed.
REFERENCES:
patent: 4916605 (1990-04-01), Beardsley et al.
patent: 5086502 (1992-02-01), Malcolm
patent: 5446877 (1995-08-01), Liu et al.
patent: 5717919 (1998-02-01), Kodavalla et al.
patent: 5956745 (1999-09-01), Bradford et al.
patent: 6108748 (2000-08-01), Ofek et al.
Kawamoto, M, Restoring and updating records in disk cache system during disk drive idle time-restores record to disk drive from non-volatile memoryin response to receipt of start and end addresses of record from non-volatile memory, Derwent Week: 199714, Dec. 1996.
Kaise, Hiroshi, Data writing error preventing system to magnetic tape media, JPAB, JP363046660A, pp. 1 of 1, Feb. 1988.
Iqbal Nadeem
Rosenberg , Klein & Lee
LandOfFree
Restoring method for hard disk does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Restoring method for hard disk, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Restoring method for hard disk will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2592631