In data storage, a sector is a subdivision of a track on a magnetic disk or optical disc. Each sector stores a fixed amount of data. The traditional formatting of hard disks provides space for 512 bytes (magnetic disks) or 2048 bytes (optical discs) per sector. Newer hard drives use 4096 byte sectors (2010).
The word sector means a portion of a disk between a center, two radii and a corresponding arc shaped like a slice of a pie. The common disk sector actually refers to the intersection of a track and mathematical sector.
In hard disk drives, each physical sector is made up of three basic areas, the sector header, the data field and the Error Correcting Code (ECC). The sector header contains information used by the drive for internal synchronization as well as data identification purposes.
This information includes the gap, synch byte and address mark. The data field contains the recorded user data. The ECC field contains codes based on the data field, which are used to check and possibly correct any potential errors that may have been introduced into the data.
In hard disk drives, each physical sector is made up of three basic areas, the sector header, the data field and the Error Correcting Code (ECC). The sector header contains information used by the drive for internal synchronization as well as data identification purposes.
This information includes the gap, synch byte and address mark. The data field contains the recorded user data. The ECC field contains codes based on the data field, which are used to check and possibly correct any potential errors that may have been introduced into the data.
ශිල්ප 64