Command Processing During Startup And Format Operations; Internal Error Condition - IBM Ultrastar 36LZX Specifications

11.1.6 Command Processing During Startup and Format Operations

If the Target receives a command from an Initiator while the Target is executing a startup or format
operation, the response of the Target varies with the command as follows:
INQUIRY
REQUEST SENSE
ALL OTHER

11.1.7 Internal Error Condition

The Target generates an Internal Error condition for all Initiators when an internally initiated operation
ends with an unrecoverable error, that is, the startup sequence for Auto Start enabled terminates after
the SCSI bus has been enabled and prior to completion of the bring-up sequence.
An Internal Error condition causes Sense data to be generated and saved for all Initiators. The Error
Code field of the Sense is set for a Current Error (70h) and the Sense Key is set to HARDWARE
ERROR. Recovered errors are not reported.
The Internal Error condition persists for each Initiator until that Initiator clears the condition from the
logical unit as described below. Several commands are handled as special cases during an Internal Error
condition. These cases are also discussed.
If the Target receives a command from an Initiator while an Internal Error condition exists for that
Initiator, the response of the Target varies with the command as follows:
INQUIRY
REQUEST SENSE
ALL OTHER
The drive sends inquiry data and returns appropriate status.
Executes the command, returns a Sense key of NOT READY and an Additional
Sense Code of LOGICAL UNIT NOT READY and returns GOOD STATUS.
The Additional Sense Code Qualifier that is returned depends on type of I/O
processes that are active:
For the START/STOP UNIT and the Auto-start operation, the qualifier returned
is LOGICAL UNIT IS IN PROCESS OF BECOMING READY. For the FORMAT
UNIT command, the qualifier returned is LOGICAL UNIT NOT READY,
FORMAT IN PROGRESS, and the Sense key specific bytes are set to return the
progress indication.
The drive terminates the command with CHECK CONDITION status. The Sense
data generated is described in Request Sense above.
The drive executes the command with GOOD status and does not clear the
Internal Error condition.
The drive executes the command, returns the sense data generated by the
Internal Error condition, returns Good Status, and clears the Internal Error
condition for that Initiator.
The drive terminates the command with a CHECK CONDITION status and
clears the Internal Error condition.
Ultrastar 36LZX hard disk drive specifications
214