
REQUEST SENSE |
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| 6.Command Specification | |||||
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| Bit | 7 | 6 |
| 5 |
| 4 |
| 3 |
| 2 |
| 1 | 0 |
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| Byte |
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| 0 | Valid |
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| Error | Code (70h or | 71h) |
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| 1 |
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| Segment Number |
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| 2 | Filemark | EOM |
| ILI |
| Reserved |
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| Sense Key |
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| 3 | (MSB) |
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| Information |
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| 6 |
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| (LSB) |
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| 7 |
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| Additional Sense Length (14h) |
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| 8 | (MSB) |
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| 11 |
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| (LSB) |
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| 12 |
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| Additional Sense Code (ASC) |
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| 13 |
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| Additional Sense Code Qualifier (ASCQ) |
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| 14 |
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| Field Replaceable Unit Code |
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| 15 | SKSV |
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| 17 |
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| 18 |
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| Reserved |
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| 19 | (MSB) |
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| Read/Write Data Error Counter |
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| 21 |
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| 22 | (MSB) |
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| Remaining Tape |
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| 25 |
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| (LSB) |
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| 26 |
| Reserved |
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| CLN |
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| Reserved | MEW |
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| 27 |
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| Reserved |
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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
For WRITE type operations, the drive will return a CHECK CONDITION on any operation which occurs following detection of the
For READ type operations, the drive will not return a CHECK CONDITION until the drive encounters the physical
Note that at PHYSICAL
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.
SONY |