Hitachi AMS 2000 Series, Reference Manual

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Maintenance log and tracing functions
Hitachi AMS 2000 Family Command Control Interface (CCI) Reference Guide
Log files
The CCI software (HORCM) and ShadowImage, SnapShot, TrueCopy or TCE
commands maintain internal logs and traces which can be used to identify
the source of errors and keep records of the status transition history of
paired volumes. Figure 3-1 displays the CCI logs and traces.
HORCM logs are classified into start-up logs and execution logs. The start-
up logs contain data on errors that occur before the HORCM is ready to
provide services. Thus, if the HORCM fails to start up due to improper
environment settings, refer to the start-up logs to resolve the problem. The
HORCM execution logs (error log, trace, and core files) contain data on
errors that are caused by software or hardware problems. These logs
contain internal error data, which does not apply to any user settings;
therefore, users do not need to refer to the HORCM execution logs. When
an error occurs during the execution of a command, data on the error is
collected in the command log file. Users may refer to the command log file
if a command execution error occurs.
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Figure 3-1: Logs and Traces
The start-up log, error log, trace, and core files are stored as shown in 
Table 3-1 . Specify the directories for the HORCM and command log files
using the HORCM_LOG and HORCC_LOG environmental variables as shown
in Table 3-2 . If it is not possible to create the log files, or if an error occurs
before the log files are created, the error logs are output in the system log
file. If the HORCM activation fails, the system administrator should check
the system log file, identify the error cause, and take the proper action. For
details on message output to the system log file and the recommended
Command
Command log
file
Command execution environment
HORCM
HORCM
start-up logs
HORCM
logs
HORCM
traces
Command
traces
HORCM
core
Command
core
HORCM execution environment
Log directory
Log directory
Command Command