3.3 Defect Management
(1)
Alternate block allocation during FORMAT UNIT command execution
When the FORMAT UNIT command is specified, the allocation of the alternate block to those
defective sectors included in the defect lists (P, G, or D) is continued until all spare sectors in the
same cell are used up. When they are used up, unused spare sectors in the alternate cylinder are
allocated to the defective sectors that follow the sector by means of alternate sector treatment.
Figure 3.7 is examples of the alternate block allocation during the FORMAT UNIT command
execution.
: n represents a logical data block number
: Defective sector
: Unused spare sector
Figure 3.7 Alternate block allocation by FORMAT UNIT command
During FORMAT UNIT command, alternate block allocation is conducted in following cases:
1) Unrecovered write offtrack condition during a media write
2) Uncorrectable Data Error during a media read (certification) *1
C141-E266
37
Summary of Contents for MBC2036RC SERIES
Page 1: ...C141 E266 01EN MBC2073RC MBC2036RC HARD DISK DRIVES PRODUCT MANUAL ...
Page 10: ...This page is intentionally left blank ...
Page 16: ...This page is intentionally left blank ...
Page 24: ...This page is intentionally left blank ...
Page 56: ...This page is intentionally left blank ...
Page 82: ...Diagnostics and Maintenance 78 C141 E266 Figure 6 4 Fraction packaging ...
Page 88: ...This page is intentionally left blank ...
Page 94: ...This page is intentionally left blank ...
Page 96: ...This page is intentionally left blank ...
Page 97: ......
Page 98: ......