A |
COMMON COMMAND SET AND DISK OPERATION
The format operation may have a defect list, if a defect list is supplied, a new defect list is built below the user supplied defect list with the four byte header as required by the SCSI device. Three defect list types are accepted.
type 0 | User list in logical block number. |
type 1 | User list in head, cylinder, sector within track. |
type 2 | User list in head, cylinder, bytes from index. |
The new defect list is built as following:
Build 4 byte defect list header:
Byte 0 | = | 00. |
Byte 1 | = | $80 ORed with bits |
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| of format packet. These bits give the user |
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| control certification and primary defect |
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| list, and stop format on defect list error. |
Byte 2 | & 3 = | Defect list length. |
Byte 4 to n = | Defect entries as needed. | |
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| No conversion is made from one defect |
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| list type to another type. |
If no defects are supplied by the user, a 4 byte defect list header is built.
Build 4 byte defect list header.
Byte 0 | = | 00. |
Byte 1 | = | $80 ORed with bits |
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| of format packet. These bits give the user |
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| control certification and primary defect |
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| list, and stop format on defect list error. |
Byte 2 | & 3 = | 00 Defect list length. |
The format command descriptor block is built based on the above information regarding defect list, defect list type, the CL bit in byte offset $14 of user format packet, and the interleave from byte offset $0E.
