See DMP event log messages
The event source daemon (vxesd) is a Veritas Dynamic Multi-Pathing (DMP) component process that receives notifications of any device-related events that are used to take appropriate actions.
DMP notifies vxesd of major events, and vxesd logs the event in a log file (/etc/vx/dmpevents.log). These events include:
Enabling paths or DMP nodes
Disabling paths or DMP nodes
Throttling of paths
I/O error analysis
Host Bus Adapter (HBA) and Storage Area Network (SAN) events
The log file is located in
/var/adm/vx/dmpevents.log but is symbolically linked to
/etc/vx/dmpevents.log. When the file reaches 10,000 lines, the log is rotated. That is, dmpevents.log is renamed dmpevents.log.X and a new dmpevents.log file is created.
Event log messages are categorized by log level, as follows:
Critical DMP log messages.
Messages that relate to I/O throttling,
suspected path failures, repeated path failures, and DMP
Messages that relate to I/O
errors, I/O error analysis, and path media errors.
Messages that relate to
setting or changing attributes.
Greater than level 4
Messages available for troubleshooting by Symantec support.
By default, only level 1 event log messages are displayed. You can change the level of detail in the event log file using the tunable dmp_log_level.
See the vxdmpadm(1M) manual page.