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ST43401N/ND and ST43402ND Reference Manual, Rev. C
continued from previous page
Bit 7 = 1:
Indicates an Identify message
Bit 6 = 1:
Indicates the initiator allows disconnection and reselection
Bit 6 = 0:
Indicates that disconnection is not allowed
Bit 5 = 0:
Indicates the I/O is directed to or from a logical unit
Bit 5 = 1:
Indicates the I/O is directed to or from a target routine
Bits 4 to 3: Reserved
Bits 2 to 0: Specify a logical unit number or target routine number,
depending on bit 5
M = Mandatory for SCSI-2
O = Optional for SCSI-2
Note 1. For dual port drives, a bus device reset message from either port causes a
unit attention condition for all initiators on both ports. Commands, reserva-
tions, wide negotiations, and synchronous negotiation agreements associ-
ated with the alternate port are not affected.
Note 2. For dual port drives, a clear queue message from either port causes all
commands from that port to be cleared. A unit attention condition is set for
all initiators on that port except the one that sent the Clear Queue message.
Commands for the other port are not affected.
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