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9.4 COUNT Field
The COUNT field is an output from the device to the host. The use of the COUNT field depends on the command
being processed. Commands may use the COUNT field to indicate:
a) the number of contiguous logical sectors that contain potentially bad data for commands in the Streaming
feature set; or
b) the tag of an NCQ command for commands in the NCQ feature set.
9.5 SACTIVE Field
See ATA8-AST for a description of the SACTIVE field.
9.6 SATA STATUS Field
See ATA8-AST for a description of the SATA STATUS field (i.e., word 0 of the Set Device Bits FIS).
9.7 LBA Field
9.7.1 Overview
The LBA field is an output from the device to the host. The use of the LBA field depends on the command being
processed. Commands may use the LBA field to indicate the LBA of the first unrecovered error (see Section 9.7.2).
9.7.2
LBA of First Unrecoverable Error
For commands that return LBA of the first unrecoverable error, if an unrecoverable error was encountered prior to or
during the processing of that command, then the LBA field contains the LBA of the first unrecoverable error.
This value does not provide any status information regarding any data transferred by the command that returned the
error. The value may be outside the LBA range of the command that returned the error.
9.8 Sense Code Definition
9.8.1 Overview
This subclause describes the recommended sense data specified in the Error outputs in Command Descriptions.
The methods for retrieving the sense data are described in the following subclauses:
a) Sense data reporting feature set;
b) Returning sense data for successful NCQ feature set commands;
c) NCQ Command Error log; and
d) NCQ Autosense.
The sense keys and additional sense code values are found in Section 13.
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Hard Disk Drive Specification