Fujitsu MBC2073RC, MBC2036RC, MBA3300RC, MBA3147RC, MBA3073RC Format Commands, = Hardware Error

4.3 Format Commands

The HDD allocates alternate blocks to the specified data blocks in order from the top of the defect descriptor list. When all the usable spare sectors have been used up, and it is impossible to allocate alternate blocks, execution of this command is terminated at that point and a CHECK CONDITION status is reported. The sense data at this time indicate the following contents.

• Sense key:	4 = HARDWARE ERROR
• Additional sense code/:	32-00 = No defect spare location available
Additional sense code qualifier
• "VALID" bit:	"1"
• Information field	Logical block address specified in the defect
	descriptor at the point when alternate block
	allocation becomes impossible.
• Command inherent
information field

Also, when this command is terminated abnormally with a CHECK CONDITION status due to any one of several other types of error besides the above error, the logical block address specified in the first defect descriptor which did not undergo alternate block allocation is reported in the "Command inherent information" field in the sense data. However, if alternate block allocation processing of the defect descriptors for which alternate block allocation has not been implemented cannot be specified, or if alternate block allocation of all the specified defect descriptors has been completed, the "Command inherent information" field indicates X 'FFFFFFFF.'

When alternate block allocation processing is successful, the defect position information on the disk media related to the data blocks specified in the defect descriptor list is recorded on the disk media as the defect list (G List). The INIT can read the contents of the G List using the READ DEFECT DATA command. Also, this command has no influence on the contents of the primary defect list (P List).

The defect position information in the G List is physical block addresses (logical data block addresses are allocated when no defect exists on the disk media). Therefore, the values specified in this command's defect descriptor list (logical block addresses) may not necessarily be the same as the contents of the G List read by the READ DEFECT DATA command after this command is terminated. For details, see the description of the READ DEFECT DATA command (Section 4.3.3).

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