System information

97 of 114Release 7.0VNX™ System Operations
Collect problem information
For problems with Unisphere software or the VNX system, EMC recommends that
before contacting the service provider or EMC for help, run log collection promptly.
The sooner the collection script is run, the more likely you are to collect command
output, logs, and dump files that can be helpful when investigating the problem.
The tasks for collecting problem information are:
◆ "Run log collection and automatic transfer" on page 99
◆ "Run log collection from the CLI" on page 99
"Use CLI options to perform script operations" on page 102 details the command
options available to perform script operations.
Automatically collect and transfer logs
The Automatic Collection and Transfer tool aids in troubleshooting and resolving
system errors and other problems with the VNX that are configured to issue a
CallHome. When VNX for file services are running, the collection script
automatically runs in the background on the Control Station when needed to collect
command output, logs, and dump files related to events that produce a CallHome.
Examples of such events include Data Mover panics and Replication session
failures.
Note: As the script does not run during system installations and upgrades, it does not
collect events that might occur during those operations.
The tool produces zipped archive files of logs needed to analyze issues, and writes
these files to /nas/var/emcsupport. This tool also collects Data Mover panic dumps
when they occur with support materials. The Data Mover panic dumps are stored in
the directory /nas/var/dump. After collecting logs and files, if the transfer script is
enabled, the tool automatically transfers the collected data through FTP to EMC. By
default, the transfer capability is disabled.
A maximum of 460 MB is used for archiving log collections and a maximum of two
Data Mover panic dumps. If the logs and dumps specified in the configuration file
have reached the maximum, the tool deletes the oldest log to make room for new
logs. However, the tool leaves old dumps in place, so those have to be manually
deleted from the dump directory.
When the tool successfully transfers a Data Mover panic dump to /nas/var/dump, it
automatically clears the dump partition. If two dumps already exist in the dump
area, the tool logs a message to sys_log, indicating that it cannot extract any further
dumps to /nas/var/dump until unneeded dumps are manually deleted.