Confirming failover operation
To confirm that the advanced path failover drivers have installed and are operating correctly, open the
system event viewer. See
on page 46 for instructions on how to filter out irrelevant
events. The following events should be present; the first event in this list will be the first to occur after
system restart:
HPtapeFailover_filt
Path failover driver loaded
HPtapeFailover_mpio
Path failover driver loaded
Followed by one instance of the following message for each active path:
HPtapeFailover_mpio
Path failover session established…
For more details on which paths are active and passive, use the diagnostic application (see
on page 67).
Windows system log
The drivers create entries in the Windows system log when they are first started and whenever any
exceptional conditions occur. These log entries are summarized in the following Event Log Entries table.
The symbols beginning with ‘%’ are strings filled in by the operating system when the log entry is
generated.
Table 3: Event Log Entries
Event
Severity
Message
Driver loaded
Informational
Path failover driver loaded
Driver unable to load
Error
Path failover driver unable to load
Path failure detected
Error
Path failure detected on SCSI Port
%s Bus %3 Target Id %4 Logical Unit
%5
Path removal reported by Windows
Error
Path removal reported on SCSI Port
%1 SCSI Bus %2 Target ID %3 Logical
Unit %4
Device serial number for failing path Informational
Device ID: %1
Device Names for failing path
Informational
Device WWNN: %1-%2 Device WWPN: %3-
%4 Host WWPN: %5-%6
Error reported for failing path
Informational
Device error: NT status = %1. SCSI
Status = %2, Sense Key = %3, ASC/
ASCQ = %4/%5, Drive Error Code =
%6/%7
Table Continued
66
Confirming failover operation
