Sense Data Description; Valid (Bit 7 Of Byte 0); Error Code (Bit 6 - 0 Of Byte 0); Ili: Incorrect Length Indicator (Bit 5 Of Byte 2) - IBM Ultrastar 36LZX Specifications

12.2 Sense Data Description

12.2.1 Valid (Bit 7 of byte 0)

0 The Information Bytes (byte 3 through 6) are not defined.
1 The Information Bytes (byte 3 through 6) contain a valid logical block address.

12.2.2 Error Code (Bit 6 - 0 of byte 0)

70h Current Error. This indicates an error for the current command.
71h Deferred Error. This indicates that the error is for a previous command that has already
returned a good status. Such commands are associated with the immediate bit or write
caching.
Format unit (04h) command is an example of a command that may return a deferred
error.

12.2.3 ILI: Incorrect Length Indicator (Bit 5 of byte 2)

The ILI bit is valid for the Read Long (3Eh) command and Write Long (3Fh) command only. ILI set to
one and Valid Bit set to one indicates that the requested logical block length does not match the logical
block length of the data on the medium for a Read Long or Write Long command. The Information field
contains residue information about the error. ILL set to zero indicates there is no incorrect length
condition.
0 No Incorrect Length condition.
1 Incorrect Length Indicated.

12.2.4 Sense Key (Bit 3 - 0 of byte 2)

The sense key provides generic categories in which error and exception conditions can be reported.
Initiators would typically use sense keys for high level error recovery procedures.
0h No Sense
There is no sense key information to be reported for the logical unit.
1h Recovered Error
The last command completed successfully with some recovery action performed by the
drive. More detailed information is available in the Additional Sense Code and Additional
Sense Code Qualifier.
2h Not Ready
The logical unit addressed cannot be addressed. More detailed information is available
in the Additional Sense Code and Additional Sense Code Qualifier.
3h Medium Error
The command terminated with an unrecoverable error condition caused by a flaw in the
media or an error in the recorded data. More detailed information is contained in the
Additional Sense Code and Additional Sense Code Qualifier.
4h Hardware Error
The drive detected a unrecoverable hardware error while performing a command or
during a diagnostic test. More detailed information is contained in the Additional Sense
Code and Additional Sense Code Qualifier.
Ultrastar 36LZX hard disk drive specifications
234