Operating instructions

24-2
SCSI REFERENCE 1012975
CHAPTER 24—TEST UNIT READY (00h)
Busy
The autoloader returns Busy status when it is processing a command for a
different initiator or when it is in the process of aborting a motion command.
Reservation Conflict
The autoloader returns Reservation Conflict status when it is reserved by a
different initiator. See Chapter 20 for more information about the RESERVE
command.
Check Condition
The autoloader returns Check Condition status for the following reasons:
 The message system is enabled and a message error occurs while the
autoloader is processing the command.
 The autoloader detects an unrecoverable parity error while receiving the
CDB.
 The command is issued to an invalid LUN.
 A Unit Attention condition is pending for the initiator.
 The autoloader has experienced an unrecoverable hardware error.
 The autoloader is not ready because the door is open.
 A reserved bit is set to 1 in the CDB.
 A parameter in the CDB or parameter list is invalid (see Table 24-1 for sense
data).
Table 24-1 Invalid parameters in the TEST UNIT READY CDB and parameter list
Sense
Key
ASC ASCQ
SKSV
Bit
C/D
Bit
BPV
Bit
Bit
Pointer
Field
Pointer
Error
5h 24h 00h 1 1 1 — —
A reserved bit is set in the CDB. The
pointers point to the bit in error.