HP XP Racks - Manual (Page 727)

NOTE: When executing many CLI commands, the amount of information output to SYSLOG
increases accordingly.
HyperSwap Completion Detection
For 2DC configurations with HyperSwap and Cnt Ac-J Z, a HyperSwap is performed when failure
occurs during access to the primary storage system. After the HyperSwap is completed, the
IOSHM0414I
message is output. The YKCONMSG command can be used to monitor for output of
this message, to detect when a HyperSwap has been completed. Note that this message is output
not only during a failure, but also for the planned execution of a HyperSwap.
Recovering from a Failure
This section explains how to recover from various kinds of failures.
Recovering a Command Device After an LDEV Blockage
You cannot perform a re-definition or deletion of a command device when an LDEV blockage
occurs.
To recover a command device when an LDEV blockage has occurred:
Procedure 1
1. Recover from an LDEV blockage as shown in the storage system maintenance manual for the
specific hardware model in which the LDEV blockage occurred.
NOTE: This step must be performed by HP support personnel.
2. Check the volume where the failure occurred.
If the command device is defined correctly, the command device information is stored in the
catalog. Since the command device is registered under the following file name, use a TSO/E
command such as LISTCAT to check the volume where the failure occurred.
Dataset name: prefix.COMDEV.APIDnnnn.dad-id
nnnn refers to the APID.
3. Re-define the command device.
Once recovery is complete, perform volume initialization and dataset allocation as shown in ???,
execute the YKBLDCMD command from the ISPF panel or a script, and then re-define the command
device.
Recovering a Command Device After a Power Outage
Command device registration information and logical path information within the storage system
may be lost due to a power outage. After turning on the power again, perform the following
operations, if necessary:
•
If the result of executing the YKQRYPTH command indicates that the logical path used before
the power outage was in the NOPATH status, re-execute the YKBLDPTH command from either
the ISPF panel or a script.
•
If the Remote DKC Control Function does not operate properly after power has been restored,
re-execute the YKBLDCMD command from the ISPF panel or a script.
Recovering a Log Dataset After Logs are Full
Either use the automatic deletion function to prevent log datasets from becoming completely full,
or delete and re-define the log stream regularly. For more information about the automatic log
deletion function, see
“Which Parameters to Specify for a Log Stream Definition” (page 716) .
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