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User’s Guide 21020285 D
Chapter 6 Target Mode Pass-through Commands
Target Selection Data Structure Page 6 - 13
Error Sequence Code - The Error Sequence Code tells you, according to
the following table, where in the selection process an unrecoverable error
occurred, or a Message Byte was sent from the initiator. Some of these codes
are not possible due to a selection, but may be reported in a Target Mode
Response command Status Block.
Identify Message Received
This byte contains the last Identify message that was received from the initiator.
This byte includes the logical unit number (LUN) of the target being selected.
If the Error Sequence Code is 5, or the Error field is 33H, this field is invalid.
Initiator Identifier
This byte contains the SCSI ID of the initiator that selected the adapter. If the
Error field is 33H, this field is invalid.
Command Descriptor Block Length
This byte indicates the number of command bytes that were received from the
initiator, and have been passed on in the CDB fields of the Target Selection
Data Structure. If the CMD bit is clear (in the SCSI Flags field), this field is
invalid.
Message Bytes Received
This byte contains a SCSI message byte received from the initiator. If the MSG
bit is clear (in the SCSI Flags field), this field is invalid. Also, the value of the
Error Sequence Code must be considered when examining the Message Byte.
Queue Tag Identifier
This byte contains the queue tag identifier assigned to this SCSI command by
the initiator. If the Queue Tag message is 0H, this field is invalid (no queue tag
was received).
Queue Tag Message
This byte contains any Queue Tag message received from the initiator.
Sequence Description
0 No message was received.
1 Message received after the RF3880 sent the Status or First Message Byte.
2 Message received after sending the Message Byte.
3 Message received after sending the Queue Tag Message.
4 Message received after a Data Transfer phase.
5 Message received after Selection phase.
6 Message received after sending the Identify message.
7 Message received after a Command phase.
8 Message received in response to SDTR message.
9 Message received in response to WDTR message.
Table 47: Target Mode Error Sequence Code