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CDU-541 CD-ROM DRIVE SCSI INTERFACE MANUAL
Table 5-29: Sense Key Descriptions
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NO SENSE (Oh).
Indicates that there is no specific sense key information to
be reported for the designated logical unit.
RECOVERED ERROR (lh).
Indicates that the last command completed successfully
with some recovery action performed by the controller.
Details may be
determinable by examining the additional sense bytes and the information
bytes.
(See Section 5.3.1.1.)
NOT READY (2h).
Indicates that the logical unit addressed is not accessible.
Operator intervention may be required to correct this condition.
MEDIUM ERROR (3h).
Indicates that the command terminated with a unrecovered
error condition that was probably caused by a flaw in the medium or an error
in the recorded data.
This sense key may also be returned if the controller
is unable to distinguish between a flaw in the medium and a specific hardware
failure (sense key 4h).
(See Section 5.3.1.1.)
HARDWARE ERROR (4h).
Indicates that the controller detected a unrecoverable
hardware failure (for example. controller failure. device failure. parity
error. etc.) while performing the command or during a self test.
ILLEGAL REQUEST (5h).
Indicates that there was an illegal parameter in the
command descriptor block or in -the additional parameters supplied as data for
some commands. If the controller detects an invalid parameter in the command
descriptor block. then it will terminate the command without altering the
medium.
If the controller detects an invalid parameter in the additional
parameters supplied as data. then the controller may have already altered the
medium.
UNIT ATTENTION
(6h).
Indicates that the removable medium may have been
changed or the controller has been reset.
(See 4.1.3)
ABORTED COMMAND (Bh).
Indicates that the controller aborted the command.
The
initiator may be able to recover by trying the command again.
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5-53
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