Method for registering a defect map within a hard disk drive
View Patent ↗A method for registering a defect map within a hard disk drive is disclosed. A hard disk drive includes a recording disk, a head assembly, and a controller. Multiple sectors are formed on the recording disk, and the head assembly includes a head for reading/writing data from/to the recording disk. The controller, which controls the head assembly to read/write data from/to the recording disk, includes a defect sector positional information holding device and a sector identification device. The defect sector positional information holding device holds positional information of a defect sector disabled to read/write data therefrom/thereto the recording disk. The positional information includes the number of the defect sectors continued in a circumferential direction and in a radial direction of the recording disk. The sector identification device refers to the positional information of the defect sector so as to identify a target sector from/in which data is to be read/written when a read/write command is received from a host computer.
1. A method for registering a defect map within a hard drive, said method comprising:
accepting, from a host computer, specification of a sector from/to which data is to be read/written according to a logical address without any consideration to a defect sector on a recording disk within said hard disk;
obtaining a physical address of said sector with reference to a range in which defect sectors exist, wherein said obtaining further includes
sequentially searching sectors on said recording disk in a predetermined order;
adding said logical address of said sector to a number of defect sectors up to said sector to obtain a physical address of said sector when the number of tracks is 1 in said range that denotes a presence of defect sectors continued up to immediately before said sector; and
adding said logical address of said sector to a number of defect sectors up to said sector to obtain a physical address of said sector when the number of tracks is 2 or higher in said range that denotes a presence of defect sectors continued up to immediately before said sector, and said sector is not included in said range; and
reading/writing data from/to said sector according to said obtained physical address.
2. A method for registering a defect map that denotes positions of defect sectors on a recording disk, said method comprising:
setting a plurality sectors on a recording disk, as defect sectors when said plurality of sectors does not satisfy a predetermined standard; and
registering said plurality of defect sectors continued either in a circumferential direction or in a radial direction of said recording disk as one block in a defect map according to the position of a first defect sector, the number of said plurality of defect sectors continued in a track of said recording disk, and the number of tracks in which said plurality of defect sectors are continued in a radial direction of said recording disk, wherein said number of tracks, when two or higher, is registered in said defect map so as to avoid presence of two or more defect sector blocks in the same track.
3. The method of claim 2 , wherein a number of said sectors, when two or higher, is registered in said defect map so as to have an identical value among tracks.
4. A hard drive, comprising:
a recording disk on which a plurality of sectors are formed;
a head assembly having a head that reads/writes data from/on said recording disk;
a controller for controlling said head assembly to read/write data from/to said recording disk, wherein said controller includes:
setting a plurality of sectors on a recording disk as defect sectors when said plurality of sectors d not satisfy a predetermined standard; and
registering said plurality of defect sectors continued either in a circumferential direction or in a radial direction of said recording disk as one block in a defect map according to the position of a first defect sector, the number of said plurality of defect sectors continued in a track of said recording disk, and the number of tracks in which said plurality of defect sectors are continued in a radial direction of said recording disk, wherein said number of tracks, when two or higher, is registered in said defect map so as to avoid presence of two or more defect sector blocks in the same track.
5. The hard drive of claim 4 , wherein a number of said sectors, when two or higher, is registered in said defect map so as to have an identical value among tracks.