Fujitsu MHN2150AT Manual/User Guide - Page 212
This processing is performed when the alternate assignment is specified in
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Operations 0 1 2 3 4 5 6 7 657 658 659 0 1 2 3 (unused) 4 5 6 656 657 658 Note: If an access request to logical sector 4 is specified, the device accesses physical sector 5 instead of sector 4. Figure 6.5 Sector slip processing (2) Alternate cylinder assignment A defective sector is assigned to the spare sector in the alternate cylinder. This processing is performed when the alternate assignment is specified in the FORMAT TRACK command or when the automatic alternate processing is performed at read error occurrence. Figure 6.8 shows an example where logical sector 4 is detective on head 0 in cylinder 0. 6-10 C141-E120-02EN
Operations
6-10
C141-E120-02EN
7
5
6
4
3
2
1
0
(unused)
657
658
659
658
657
656
6
5
4
3
2
1
0
Note:
If an access request to logical sector 4 is specified, the device
accesses physical sector 5 instead of sector 4.
Figure 6.5
Sector slip processing
(2)
Alternate cylinder assignment
A defective sector is assigned to the spare sector in the alternate cylinder.
This processing is performed when the alternate assignment is specified in the
FORMAT TRACK command or when the automatic alternate processing is
performed at read error occurrence.
Figure 6.8 shows an example where logical sector 4 is detective on head 0 in
cylinder 0.