Table 69

+========-====================================================================+ 
| Sense  |  Description                                                       |
|  key   |                                                                    |
|--------+--------------------------------------------------------------------|
|   0h   |  NO SENSE.  Indicates that there is no specific sense key          |
|        |  information to be reported for the designated logical unit.  This |
|        |  would be the case for a successful command or a command that      |
|        |  received CHECK CONDITION or COMMAND TERMINATED status because one |
|        |  of the filemark, EOM, or ILI bits is set to one.                  |
|--------+--------------------------------------------------------------------|
|   1h   |  RECOVERED ERROR.  Indicates that the last command completed       |
|        |  successfully with some recovery action performed by the target.   |
|        |  Details may be determinable by examining the additional sense     |
|        |  bytes and the information field.  When multiple recovered errors  |
|        |  occur during one command, the choice of which error to report     |
|        |  (first, last, most severe, etc.) is device specific.              |
|--------+--------------------------------------------------------------------|
|   2h   |  NOT READY.  Indicates that the logical unit addressed cannot be   |
|        |  accessed.  Operator intervention may be required to correct this  |
|        |  condition.                                                        |
|--------+--------------------------------------------------------------------|
|   3h   |  MEDIUM ERROR.  Indicates that the command terminated with a non-  |
|        |  recovered 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 target is unable to distinguish between a |
|        |  flaw in the medium and a specific hardware failure (sense key 4h).|
|--------+--------------------------------------------------------------------|
|   4h   |  HARDWARE ERROR.  Indicates that the target detected a non-        |
|        |  recoverable hardware failure (for example, controller failure,    |
|        |  device failure, parity error, etc.) while performing the command  |
|        |  or during a self test.                                            |
|--------+--------------------------------------------------------------------|
|   5h   |  ILLEGAL REQUEST.  Indicates that there was an illegal parameter in|
|        |  the command descriptor block or in the additional parameters      |
|        |  supplied as data for some commands (FORMAT UNIT, SEARCH DATA,     |
|        |  etc.).  If the target detects an invalid parameter in the command |
|        |  descriptor block, then it shall terminate the command without     |
|        |  altering the medium.  If the target detects an invalid parameter  |
|        |  in the additional parameters supplied as data, then the target may|
|        |  have already altered the medium.  This sense key may also indicate|
|        |  that an invalid IDENTIFY message was received (6.6.7).            |
|--------+--------------------------------------------------------------------|
|   6h   |  UNIT ATTENTION.  Indicates that the removable medium may have been|
|        |  changed or the target has been reset.  See 7.9 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.         |
+=============================================================================+