Message Reject In/Out; No Operation Out; Message Parity Error Out; Bus Device Reset Out - Sun Microsystems storagetek sl500 Reference Manual

Message System

Message Reject In/Out

Either an initiator or the library sends a Message Reject (07) to indicate the last
message received was inappropriate or not supported.

No Operation Out

When a library receives a No Operation message (08), command processing
continues without any action taken.

Message Parity Error Out

The library receives a Message Parity Error (09) when an initiator detects bad
parity on a message byte. If the last phase was Message In, the library resends the
message byte again.

Bus Device Reset Out

The Bus Device Reset message (0C) causes the library to immediately go to the Bus
Free phase and resets the SCSI interface.

Identify Message In/Out

Either the initiator or the library sends the Identify message (80 to FF). The initiator
sends this message to the library to enable the message system.
Identify messages are sent by either the initiator or the target to establish the
physical path connection between an initiator and the target for a particular logical
unit. The library sends this message to the initiator following the reselection
sequence. The format of this message is
Bit
Value
Identify
DiscPriv
LUN
Additional information regarding the messaging system (or messaging) can be
found in the SCSI-3 standard.
26 SL500: Interface Reference Manual • July 2008
7
Identify
This bit is set to 1 to distinguish the Identify message from all other
messages.
The disconnect privilege bit is used by the initiator to grant the
library disconnect privileges:
0 = Disconnect is not allowed
1 = Disconnect is allowed
When the Identify message is sent by the library, the DiscPriv is
set to 0.
The only supported Logical Unit Number (LUN) for the library is 0.
6
DiscPriv
Revision: F • 96122
5-0
LUN