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9.2.2 ALIGNMENT ERROR bit
The ALIGNMENT ERROR bit is set to one if:
a) the LOGICAL TO PHYSICAL SECTOR RELATIONSHIP SUPPORTED bit is set to one;
b) the LPS MISALIGNMENT REPORTING SUPPORTED bit is set to one;
c) the ALIGNMENT ERROR REPORTING field contains 01b or 10b; and
d) the device returns completion for a write command without an error where:
A) the first byte of data transfer does not begin at the first byte of a physical sector; or
B) the last byte of data transfer does not end at the last byte of a physical sector.
Otherwise, the ALIGNMENT ERROR bit is cleared to zero.
If an alignment error and another error occur during the processing of a write command, then the other error is
returned and the alignment error is not reported in the STATUS field (i.e., the ALIGNMENT ERROR bit is cleared to
zero). If an alignment error occurs, even if it is not reported in the STATUS field and there is space remaining in the
LPS Mis-alignment log, then an entry must be made in the log.
9.2.3 BUSY bit
The BUSY bit is transport dependent (see Section 9.2.10). Refer to the applicable transport standard for the usage
of the BUSY bit.
9.2.4
STREAM ERROR bit
The STREAM ERROR bit shall be set to one if an error occurred during the processing of a command in the Streaming
feature set (see Section 10.12) and the:
a) READ CONTINUOUS bit is set to one in a read stream command (see Section 12.29); or
b) WRITE CONTINUOUS bit is set to one in a write stream command (see Section 12.75).
Otherwise, the STREAM ERROR bit shall be cleared to zero.
If the STREAM ERROR bit is set to one, the value returned in the LBA field (47:0) contains the address of the first
logical sector in error, and the COUNT field contains the number of consecutive logical sectors that may contain
errors.
If:
a) the READ CONTINUOUS bit is set to one in a read stream command or the WRITE CONTINUOUS bit is set to
one in a write stream command; and
b) the INTERFACE CRC bit, the UNCORRECTABLE ERROR bit, the ID NOT FOUND bit, the ABORT bit, or the
COMMAND COMPLETION TIME OUT bit is set to one in the ERROR field (see Section 9.2.8),
then:
a) the STREAM ERROR bit shall be set to one;
b) the ERROR bit shall be cleared to zero; and
c) the error information (e.g., bits set in the ERROR field) shall be saved in the appropriate:
a. Read Stream Error Log (see Section 12.21.13); or
b. Write Stream Error log (see Section 12.21.12).
9.2.5 DATA REQUEST bit
The DATA REQUEST bit is transport dependent (see Section 9.2.10). Refer to the appropriate transport standard for
the usage of the DATA REQUEST bit.
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Hard Disk Drive Specification