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SCSI Commands
Quantum DLT 7000 Tape System 5-149
REQUEST SENSE Command (03h) (continued)
Table 5–71 Supported Sense Keys
Sense
Key
Description
0h NO SENSE. Check the Filemark/EOM/ILI bits and the Additional Sense Code/Additional
Sense Code Qualifier bytes.
1h RECOVERED ERROR. This can be caused by rounding of Mode Parameters on a MODE
SELECT, or may report that READ/WRITE error rates are reaching subsystem specification
limits for optimal operation. The device may still be able to continue to function without
any unrecovered errors for a long period of time, however. No CHECK CONDITION is
generated unless the PER bit of Mode Page 01h is set.
2h NOT READY. The tape medium is not ready for tape operation commands. Tape medium
might not be present in the drive or may be in the process of loading or calibrating.
3h MEDIUM ERROR. An unrecoverable WRITE, READ, or positioning error has occurred.
Detailed device-specific information may be available.
4h HARDWARE ERROR. The Additional Sense Code / Additional Sense Code Qualifier fields
may present more specific information.
5h ILLEGAL REQUEST. The Command Descriptor Block or supplied parameter data had an
unsupported or illegal operation specified. Check bytes 15, 16, and 17.
6h UNIT ATTENTION. Unit Attentions are created after a device reset, if the medium
asynchronously becomes ready to the initiator, if another initiator changes Mode
Parameters, and/or if the firmware is updated.
7h DATA PROTECTED. The current tape medium is write-protected. This can be because the
Write Protect switch on the cartridge is in its enabled position or if the tape medium is
not the appropriate type (DLTtape I or DLTtape II), or if a software write protect is issued.
8h BLANK CHECK. An End of Data or LongGap has been encountered.
Bh COMMAND ABORTED. This key is generated when a command has been aborted by the
tape drive for some reason. Check the Additional Sense Code / Additional Sense Code
Qualifier bytes.
Dh VOLUME OVERFLOW. This key indicates that the physical end of tape medium has been
reached during writing. The initiator ignored the End of Medium condition and
continued to write to tape.
Eh MISCOMPARE. A compare error has occurred during READ by the self-tests invoked
during execution of a SEND DIAGNOSTIC command.