Quantum LTO 3 User Manual page 179

SCSI Commands: 40BREQUEST SENSE
3.28.3.1 REQUEST SENSE Data Field Descriptions
Field Bytes Bits
Valid 0 7
Error Code 0 0-6
Segment 1
Number
FM bit 2 7
EOM bit 2 6
Incorrect 2 5
Length
Indicator
(ILI)
Sense Key 2 0-3
Informa- 3-6
tion
Additional 7
Sense
Length
Command 8-11
Specific
Additional 12
Sense
Code
Additional 13
Sense
Code
Qualifier
Field
14
Replace-
able Unit
Codes
SKSV 15 7
Description
0 = The Information field does not contain valid information
1 = The Information field contains valid information
This is always 0 for deferred errors.
70h = A current error, associated with the most recent command.
71h = A deferred error, not associated with the current command.
Always 0, because the COPY, COMPARE, and COPY and VERIFY
commands are not supported.
1 = A SPACE, READ, or VERIFY command did not complete
because a file mark was read.
1 = A WRITE or WRITE FILEMARKS command completed in the
early warning area. If no other error occurred, the Sense Code will
be set to No Sense and the Additional Sense will be set to EOM
(0002). If another error occurred, then the Sense Code and
Additional Sense will reflect that error.
1 = A READ or VERIFY ended because a block was read from tape
that did not have the block length requested in the command.
This field indicates the status of the last command and provides a
generic error category. See Sense Key Values.
For a READ, VERIFY or WRITE with the Fixed bit zero, this field
contains the number of bytes in the command less the number of
bytes actually processed.
For a READ, VERIFY, or WRITE with the fixed bit one or a SPACE
with the Code set to zero, this field contains the number of
blocks in the command less the number of blocks processed.
Any block partially transferred in a READ or WRITE command or
partially verified in a VERIFY command is considered processed
but is not included in the calculation.
For a WRITE FILEMARKS or SPACE command, this field contains
the difference between the number of file marks in the command
and the number of file marks processed.
n-7, indicating the length of the Sense Data.
Always 0, because no commands use this field.
This field provides further detail for the current Sense Key. See
Sense Key Values.
This field provides further detail for the current Additional Sense
Code. See Sense Key Values.
0 = No part of the drive is suspected of failing
1 to n = Identifies a part of the drive that is suspected of causing the
failure.
0 = Bytes 16-17 contain a message code as defined in Message
Codes, below.
1 = Sense Key Specific data in bytes 15-17 is valid and can be used
to determine the first parameter that caused an Illegal REQUEST
SENSE key (as defined below).
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