HP Storage Mirroring V5.1 Software - Manual (Page 138)

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Log files
Various Storage Mirroring components (Storage Mirroring service, Management Console, Failover
Control Center, and the Command Line Client) generate a log file to gather alerts, which are
notification, warning, and error messages. The log files are written to disk. They can be viewed, from
the location where Storage Mirroring is installed, with a standard text viewer. The log file output can
be filtered using the Storage Mirroring LogViewer utility.
Each log file consists of a base name, a series number, and an extension.

Base Name—The base name is determined by the application or process that is running.

Series Number—The series number ranges from 1 to 999 . For example, Storage Mirroring
begins logging messages to dtlog1 . When this file reaches its maximum size, the next log file
will be written to dtlog2 . As long as log messages continue to be written, files dtlog3 , dtlog4 ,
dtlog5 will be opened and filled. When the maximum number of files is reached, which by default
is 5 , the oldest file is deleted when the sixth file is created. For example, when dtlog6 is created,
dtlog1 is deleted and when dtlog7 is created, dtlog2 is deleted. When file dtlog999 is
created and filled, dtlog1 will be re-created and Storage Mirroring will continue writing log
messages to that file. In the event that a file cannot be removed, its number will be kept in the
list, and on each successive file remove, the log writer will attempt to remove the oldest file in
the list.

Extension—The extension for each log file is .dtl .
1. To modify the maximum file size and the number of Storage Mirroring log files that are
maintained, access the Server Properties dialog box by right-clicking a machine name in the left
pane of the Management Console and selecting Properties.
2. Select the Logging tab.
3. At the top of the window, Folder indicates the directory where the log files are located. The
default is the directory where the Storage Mirroring program files are installed.
4. Modify any of the options under Messages and Alerts, if necessary.

Maximum Length—Specify the maximum length of the log file. The default size is 1048576
bytes and is limited by the available hard drive space.

Maximum Files—Specify the maximum number of log files that are maintained. The default
is 5 and the maximum is 999 .
5. Click OK to save the changes.
Component Log File Base Name
Storage Mirroring dtlog
Management Console mc
Failover Control Center fcc
Command Line Client dtcl
Component Sample Log File Names
Storage Mirroring dtlog1.dtl, dtlog2.dtl
Management Console mc1.dtl, mc2.dtl
Failover Control Center fcc1.dtl, fcc2.dtl
Command Line Client dtcl1.dtl, dtcl2.dtl
NOTE:

If you change the Maximum Length or Maximum Files, you must restart the
Storage Mirroring service for the change to take effect.