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Disconnect Strategy
Multi-Initiator Support
to
ABORTED COMMAND
Error).
If the subsequent message is rejected with an Message Parity Error, then the
drive goes to Status phase and sends
is set to
ABORTED COMMAND
error).
On detecting a bus parity error during a Message Out phase, the drive will
handshake in all message bytes until ATN is deasserted. It will then stay in
Message Out phase to indicate to the initiator that the whole Message Out
phase should be resent.
(Parallel SCSI only)
The disconnect strategy used by the drive is based on the assumption of
maximizing bus utilization for large sequential data transfers from a large data
buffer. The drive will disconnect whenever it believes that it will provide better
bus utilization. This may be between command and data phases, between
bursts of data or before sending status. However, the drive will guarantee that
it will send the configured maximum burst size or the remaining data in the
transfer in any single data phase burst if the maximum burst size has been set
to a value other than zero.
All drives will support at least two initiators on the same bus. If more initiators
are supported, all features are supported for the supported number of
initiators.
The drive supports untagged queueing when operating with multiple initiators.
If a command from one initiator is being processed when a command, other
than
,
TEST UNIT READY
INQUIRY
received from a second initiator, then the drive will disconnect and the new
command is queued. Commands other than
always executed in strict order of receipt. If the queue is full or disconnect
privilege is not granted in the new command, the drive will report
T
,
EST UNIT READY
INQUIRY
always processed immediately, irrespective of whether a command from
another initiator is being processed.
The drive will maintain sense data for the supported number of initiators. If an
additional initiator connects to the drive, the drive will erase all sense data for
with additional sense of 4800h (Initiator Detected
CHECK CONDITION
with additional sense of 4300h (message
,
and
REPORT LUNS
these
,
and
REPORT LUNS
REQUEST SENSE
Interface Implementation
status. The sense key
, is
REQUEST SENSE
from different initiators are
status.
BUSY
commands are
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