User's Manual

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 Table 3 (page 55). The symbols
beginning with ‘%’ are strings filled in by the operating system when the log entry is generated.
Table 3 Event Log Entries
MessageSeverityEvent
Path failover driver loadedInformationalDriver loaded
Path failover driver unable to loadErrorDriver unable to load
Path failure detected on SCSI Port %s Bus %3 Target Id
%4 Logical Unit %5
ErrorPath failure detected
Path removal reported on SCSI Port %1 SCSI Bus %2
Target ID %3 Logical Unit %4
ErrorPath removal reported by Windows
Device ID: %1InformationalDevice serial number for failing path
Device WWNN: %1-%2 Device WWPN: %3-%4 Host
WWPN: %5-%6
InformationalDevice Names for failing path
Device error: NT status = %1. SCSI Status = %2, Sense
Key = %3, ASC/ASCQ = %4/%5, Drive Error Code =
%6/%7
InformationalError reported for failing path
Failover session established on SCSI Port %2 SCSI Bus
%3 Target Id %4 Logical Unit %5
InformationalFailover session established
Failover session establishment error on SCSI Port %2
SCSI Bus %3 Target Id %4 Logical Unit %5. Reason code
%6.
1
ErrorFailover session establishment error
No alternate paths for device ID: %1ErrorNo alternate paths available
Alternate Path selected: SCSI Port %1 SCSI Bus %2
Target Id %3 Logical Unit %4.
InformationalAlternate path selected after a path
failure
License key error: NT status = %1. SCSI Status = %2,
Sense Key = %3, ASC/ASCQ = %4/%5, Drive Error
Code = %6/%7.
ErrorFailure to transition a passive control
path drive to active
Nexus change notification failure: NT status = %1. SCSI
Status = %2, Sense Key = %3, ASC/ASCQ = %4/%5,
Drive Error Code = %6/%7.
ErrorFailure to notify device of a failover
operation (NCN failure)
Nexus change notification will retry after: Sense Key =
%1, ASC/ASCQ = %2/%3.
InformationalHardware error from device on NCN
Recovery aborted, sense data modified: Sense Key =
%1, ASC/ASCQ = %2/%3.
InformationalUnrecoverable error in failover sequence
negotiation after NCN failure.
A new session will be created after: NT status = %1.
SCSI Status = %2, Sense Key = %3, ASC/ASCQ =
%4/%5, Drive Error Code = %6/%7.
InformationalSense information from a device requires
a new failover session be established
Retrieve logged in host name failed: NT status = %1.
SCSI Status = %2, Sense Key = %3, ASC/ASCQ =
%4/%5, Drive Error Code = %6/%7.
InformationalUnable to retrieve logged in host table
from a tape drive
1
The reason code for a failover session establishment error is a Windows system error number. Include the reason code
with the rest of the message in any report sent to technical support.
For simplified viewing, the Windows system Event Log may be filtered using the 'Actions' panel
and selecting just events from HPtapeFailover_filt and HPtapeFailover_mpio. Including
events from UserPnp may also provide additional helpful information.
Windows debugging logs and tools 55