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9.3.4 ID NOT FOUND bit
The ID NOT FOUND bit is set to one if:
a) a user-addressable address was not found; or
b) an address outside of the range of user-addressable addresses is requested and the ABORT bit (see Section
9.3.2) is cleared to zero.
Otherwise, the ID NOT FOUND bit is cleared to zero.
9.3.5 ILLEGAL LENGTH INDICATOR bit
The operation of the ILLEGAL LENGTH INDICATOR bit is specific to the SCSI command set implemented by ATAPI
devices (e.g., devices defined by MMC-6).
9.3.6 INTERFACE CRC bit
The INTERFACE CRC bit is set to one if an interface CRC error occurred during an Ultra DMA data transfer.
The INTERFACE CRC bit is cleared to zero if an interface CRC error did not occur during an Ultra DMA data transfer.
The value of the INTERFACE CRC bit may be applicable to Multiword DMA transfers and PIO data transfers. If the
INTERFACE CRC bit is set to one, the ABORT bit is set to one.
9.3.7 UNCORRECTABLE ERROR bit
The UNCORRECTABLE ERROR bit is set to one if the data contains an uncorrectable error. The UNCORRECTABLE
ERROR bit is cleared to zero if the data does not contain an uncorrectable error.
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Hard Disk Drive Specification