Sense Keys - Seagate SCSI Interface Product Manual

SCSI Interface Product Manual, Rev. J
5.34.2

Sense Keys

Table 156 lists the Sense Keys in the extended sense data format that are used by the drive.
Table 156: Applicable Drive Sense Keys
Sense
Key Description
0h No Sense—Indicates there is no specific Sense Key information to be reported for the drive. This
would be the case for a successful command or when the ILI bit is one.
1h Recovered Error—Indicates the last command completed successfully with some recovery action
performed by the drive. When multiple recovered errors occur, the last error that occurred is
reported by the additional sense bytes.
Note: For some Mode settings, the last command may have terminated before completing.
2h Not Ready—Indicates the logical unit addressed cannot be accessed. Operator intervention may be
required to correct this condition.
3h Medium Error—Indicates the command terminated with a non-recovered error condition, probably
caused by a flaw in the medium or an error in the recorded data.
4h Hardware Error—Indicates the drive detected a non-recoverable hardware failure while performing
the command or during a self-test. This includes SCSI interface parity error, controller failure,
device failure, etc.
5h Illegal Request—Indicates an illegal parameter in the command descriptor block or in the additional
parameters supplied as data for some commands (Format Unit, Mode Select, etc.). If the drive
detects an invalid parameter in the Command Descriptor Block, it shall terminate the command
without altering the medium. If the drive detects an invalid parameter in the additional parameters
supplied as data, the drive may have already altered the medium. This sense key may also indicate
that an invalid Identify message was received. This could also indicate an attempt to write past the
last logical block.
6h Unit Attention—Indicates the drive may have been reset. See paragraph 4.6.5 for more detailed
information about the Unit Attention Condition.
7h Data Protect—Indicates that a command that reads or writes the medium was attempted on a block
that is protected from this operation. The read or write operation is not performed.
9h Firmware Error—Vendor specific sense key.
Bh Aborted Command—Indicates the drive aborted the command. The initiator may be able to recover
by trying the command again.
Ch Equal—Indicates a Search Data command has satisfied an equal comparison.
Dh Volume Overflow—Indicates a buffered peripheral device has reached the end of medium partition
and data remains in the buffer that has not been written to the medium.
Eh Miscompare—Indicates that the source data did not match the data read from the medium.
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