HP-UX iSCSI Software Initiator Support Guide, HP-UX 11i v1 and 11i v2, July 2005

Appendix D
iSCSI Software Interface Driver Statistics
iSCSI Software Interface Driver Statistics
108
Number of asynchronous
failures waiting for a login
response
D The number of asynchronous failures
experienced while waiting for a login
response. The asynchronous failure might be
due to a PDU exchange timeout/abort or lack
of memory resources. The upper level driver
recovery may retry the session open, resulting
in a re-attempt to send the Login command. If
the memory allocation request succeeds, the
Login command will transmit successfully.
Number of asynchronous
failures waiting for a logout
response
D/C The number of asynchronous failures
experienced while waiting for a logout
response. The asynchronous failure might be
due to a PDU exchange timeout/abort or lack
of memory resources. One additional attempt
to complete the Logout is made by requesting
the iswd daemon to close the TCP connection
and tear down the stream.
Number of unexpected TCP
closes in the active state
C The number of unexpected TCP close events
received during the connection ready state.
As part of recovery, all the I/Os on this
connection are aborted, the connection is
closed, and a session reopen is triggered.
Number of timeouts on FIN after
sending a logout command
C The number of timeouts on FIN after the
target has sent a logout response. A close is
triggered by requesting the iswd daemon to
close the TCP connection and tear down the
stream.
Number of TCP connection open
timeouts
C The number of TCP connection open timeout
occurs. The timeout will trigger the freeing of
resources. The upper level driver recovery
may retry the session open, resulting in a
re-attempt to send the Login command. If the
memory allocation request succeeds, the
Login command will transmit successfully.
Number of unexpected
connection closes after a login
command
C The number of unexpected TCP close events
received while waiting for a login response.
As part of the recovery mechanism, resources
are freed, the connection is closed, and a
session reopen is triggered.
Number of unexpected
connection closes after a logout
command
C The number of unexpected TCP close events
received while waiting for a logout response.
As part of the recovery mechanism, the
Logout PDU is aborted, resources are freed,
and the TCP connection is closed.
Table D-1 Software Interface Driver Statistics (Continued)
iscsiutil Statistic CL Description of Field