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3) If the REASSIGN BLOCKS command is terminated normally, verify that
logical data block according to the procedure in Section 6.3. If that data
block is judged to be correct, allocate an alternate block and terminate
processing. When the data block is judged to be defective, return to 2) and
issue the REASSIGN BLOCKS command again, then try reallocating another
alternate block for that logical data block.
The alternate block allocation history (defect position information) is registered
as an addition to the defect list (G List). Therefore, when reinitializing the hard
disk with the FORMAT UNIT command (see Section 6.2.2), if use of the G List
is specified, defect processing can be performed which reflects the operation
results up to that time. Also, since "Alternate sector processing" is applied in
alternate block allocation in the REASSIGN BLOCKS command, the physical
connectivity of the logical data block positions on the disk media is destroyed, but
by reinitializing the disk, as long as the number of defective sectors in the
cylinder does not exceed the number of spare sectors per cylinder, the logical data
blocks are relocated by sector slip processing so that their physical connectivity is
maintained.
C141-C012
6.4 Alternate Block Allocation Processing
6-9
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