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Hitachi Command Control Interface (CCI) User and Reference Guide 107
2.10 Error Monitoring and Configuration Confirmation
CCI supports error monitoring and configuration confirmation commands for linkage with the
system operation management of the UNIX/PC server.
2.10.1 Error Monitoring for Paired Volumes
The HORC Manager (HORCM) monitors all volumes defined in the configuration definition file
at a certain interval regardless of the Hitachi TrueCopy/ShadowImage commands.
Objects and scope of monitoring: The HORCM operates as a daemon process on the host
server and monitors all the paired volumes defined in the configuration definition file,
not the volume groups. The HORC Manager’s monitoring applies to the primary volumes
only (since the primary volumes control the status). The HORC Manager monitors the
changes in the pair status of these volumes. Only when the PAIR status changes to the
PSUS status and that change is caused by an error (such as PVol error or SVOL SUS), the
HORC Manager regards the change as an error.
Monitoring time and interval: This command always issues I/O instructions to the
storage system to obtain information for monitoring. It is possible to specify the
monitoring interval in the configuration definition file in order to adjust the daemon
load.
Error notification by HORCM: If the mirroring status is suspended in the normal Hitachi
TrueCopy operation, an error message is displayed by Storage Navigator (and SVP).
However, no error message may be displayed, depending on the system operation form.
Since the operation management of the UNIX server checks Syslog to find system errors
in many cases, Hitachi TrueCopy error messages are output to Syslog for linkage with the
system operation management.
Error notification command: Hitachi TrueCopy supports the error notification function
using commands in order to allow the UNIX server client to monitor errors. This
command is connected to the HORCM (daemon) to obtain the transition of the pairing
status and report it. When an error is detected, this command outputs an error message.
This command waits until an error occurs or reports that “No” error occurs if it finds no
errors in pairing status transition queue of the HORCM’s pairing monitor. These
operations can be specified using the options. If the command finds the status transition
data in the status transition queue, it displays the data of all volumes. Data in the
HORCM’s status transition queue can be erased by specifying the option of this
command.
Note: CCI (HORCM) does not support the syslog function for OpenVMS systems. As an
alternative, the HORCM daemon uses a HORCM logging file.
2.10.2 Error Monitoring for Database Validator
CCI will report the following message to the syslog file as validation error when each
statistical information counted an error will be updated.
[HORCM_103] Detected a validation check error on this volume (¡¡¡¡ unit#¡,ldev#¡) :
CfEC=n, MNEC=n, SCEC=n, BNEC=n