Table of Contents
Advertisement
2.9 Data Block Addressing
A spare sector area (replacement area) is assured in the user space for
replacement of defective sectors. The user can (using the MODE SELECT or
MODE SELECT EXTENDED command), allocate several sectors in the final
track of each cylinder and several cylinders (replacement cylinders) inside the
user space (replacement cylinders) as the replacement area.
For defective sectors on the disk medium, through IDD internal defect
management, data blocks for replacement are assigned in defective sector units.
Through this defect management, the INIT can regard all the logical data blocks
in the user space as error free and can access them.
For details concerning the data format on the disk medium (cylinder
configuration, track format and sector format) as well as details on defect
management methods and replacement block assignment methods, see Chapter 3,
"Data Format" in the "Product Manual". Also, see Chapter 6, "Management of
the Disk Medium", for an outline of defect management methods.
C141-C012
2-21
Advertisement
Table of Contents
