REQUEST SENSE
6.Command Specification
SONY AIT-5 drive SDX-1100V series Ver.1.0
6-85
Table 6-87: Error Codes 70h and 71h Sense Data Format
Bit
Byte
7 6 5 4 3 2 1 0
0
Valid
Error Code (70h or 71h)
1
Segment Number
2
Filemark
EOM ILI
Reserved
Sense Key
3
(MSB) Information
6
(LSB)
7
Additional Sense Length (14h)
8
(MSB) Command-Specific
Information
11
(LSB)
12
Additional Sense Code (ASC)
13
Additional Sense Code Qualifier (ASCQ)
14
Field Replaceable Unit Code
15
SKSV Sense-Key
Specific
17
18
Reserved
19
(MSB)
Read/Write Data Error Counter
21
(LSB)
22
(MSB) Remaining
Tape
25
(LSB)
26
Reserved CLN
Reserved
MEW
27
Reserved
Valid:
A valid bit of one indicates that the Information field holds residual data.
Error Code:
A value of 70h indicates a current error, i.e. the report is associated with the most recently received
command. A value of 71h indicates a deferred error, i.e. the report is associated with a previous command and is
not as a result of the current command. No other values will be returned.
Segment Number:
This field contains the number of the current segment descriptor if the REQUEST SENSE
command is in response to a COPY command. Otherwise this byte is ZERO. This field is not supported and is
always set to ZERO.
Filemark:
This bit indicates that the current command has read a Filemark or a Setmark. Reporting of Setmarks is
optional and indicated by the RSmk bit in the MODE SENSE/SELECT Device Configuration Parameter page.
EOM:
An End-Of-Medium (EOM) bit of ONE indicates that an End-Of-Medium condition exists. This bit of ONE
indicates that the drive is at or past the Logical Early-Warning Point if the direction was forward, or that the
command could not be completed because Beginning-Of-Partition was encountered if the direction was reverse.
The drive will also set the Sense Key to NO SENSE and the Additional Sense Code Qualifier to either 04h for
Beginning of Partition or 02h for End of Partition.
For WRITE type operations, the drive will return a CHECK CONDITION on any operation which occurs following
detection of the Early-Warning End-of-Partition marker. The EOM and Additional Sense Code fields will be set.
For READ type operations, the drive will not return a CHECK CONDITION until the drive encounters the physical
End-of-Partition.
Note that at PHYSICAL End-of-Partition, a WRITE FILEMARK command will cause the command to terminate
with a CHECK CONDITION and a sense key of VOLUME OVERFLOW.
ILI:
This is the Incorrect Length Indicator bit, which indicates that the requested logical block length did not match
the logical block length of the data on the medium. Only READ may cause this bit to be set.
Information:
This field contains the differences (residue) of the requested length minus the actual length in
either bytes, blocks, Filemarks or Setmarks as determined by the command. (Negative values are indicated by
two’s complement notation.) These bytes will be valid for all READ, WRITE and SPACE commands for which a
CHECK CONDITION status has been generated. These bytes will be ZERO for MODE SELECT/SENSE,
INQUIRY, READ BLOCK LIMITS and TEST UNIT READY commands.
