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Chapter 6 Measures in Abnormalities
III-110
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A disk array to be monitored is registered, during configuration, via specification of an IP address or host name (for
TCP/IP connection) or specification of a disk and automatic detection (for FC-AL connection).
If this description for connection is incorrect or it cannot be connected by fault, the iSM server cannot monitor the disk
array.
The following causes can be considered.
(1) Fault in IP address specification by TCP/IP connection
y Error in specification of an IP address or host name
y By network definition error and circuit fault, network did not connect between host that the iSM server operates
and SVP of the disk array.
y Same disk array were doubly defined or also defined in FC definition.
y In two or more IP address descriptions, different disk array’s IP address was defined as the same disk array.
y In the SVP definition disk array, monitoring from the host that the iSM server operates was not permitted.
(2) Fault in FC-AL connection
y Error in specification of a disk or specification missing of disk and automatic detection
y Disk array cannot be access based on hardware fault. (fault of FC-AL card, disconnection of FC-AL, disk
array’s down etc.)
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If an attempt to start the iSM server fails due to a fault in client management, a possible cause is duplicated port
numbers.
The connection port number of the client information specified at environment definition should be changed to a port
number that is not being used. In addition, on the client side, the port number of the iSM server should be changed and
should be corrected to the above-mentioned setting value.
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Control path failure or disk array failure in a monitored disk array may result in discontinuation of disk array
monitoring.
In this case, iSM switches the monitoring state on the concerned disk array into “Wait Recovery”, and waits for
recovery from the failure.
The fault-recovery waiting process checks the status of the faulty disk array at intervals specified in the environment
definition file (monitoring restarting allowance check interval), and restarts monitoring automatically upon recognizing
fault recovery.