HP XP P9500 Storage - Manual (Page 93)

Figure 16 Output to R-VOL: 2105 and 2107 controller emulations
IEA494I and IEA491E console messages
When a Continuous Access Synchronous Z pair is suspended, whether user requested or due to
failure, the MCU generates sense information to notify the host(s). If the PPRC ERP PTF is installed
and PPRC Support = Yes is selected on the RCU option dialog box, this notification results in an
IEA494I system console message as well as an IEA491E message. The IEA491E message indicates
the reason for suspension. The IEA494I and IEA491E messages are generated by the zSeries and
S/390 host based upon SSBs (sense bytes) from the storage system and not SIMs from the storage
system. Therefore, SIMs reported by the storage system to the host are not used by the GDPS
scripting.
The IEA494I message is recommended as a trigger for automation over the IEA491E message.
The IEA491E message is reported to only one host system, whereas the IEA494I message is reported
to all attached MVS hosts each time the M-VOL pair status changes. GDPS uses the IEA494I
message with extended long busy as a trigger for CGROUP (FREEZE/RUN).
If PPRC Support = No is selected on the RCU Option dialog box, the host generates the system
console message that includes the SIM instead of the IEA494I or IEA491E message.
IEA494I message
When a Continuous Access Synchronous Z pair status changes, with the exception of the transition
states suspending and deleting, the MCU reports state change interrupt (SCI) to all hosts. In response
to the SCI, the IEA494I system console message is generated (if supported by the host). P9500
reports SCI for both online and offline devices, but the host system does not generate console
messages for offline devices. Therefore, the IEA494I message is never generated with an R-VOL
device address. See
Example 1 “IEA494I message with extended long busy state” for an example
of an IEA494I message.
•
The MCU reports SCI for all Continuous Access Synchronous Z M-VOLs (synchronous only)
that are in the SCP state due to the CGROUP/FREEZE command. As shown in
Example 1 “IEA494I message with extended long busy state” , this IEA494I message indicates
the extended long busy state.
Example 1 IEA494I message with extended long busy state
IEA494I 0FC3,RD0FC3,PPRC PAIR SUSPENDING,SSID=0FC0,CCA=03,EXTENDED LONG BUSY STATE
•
The MCU reports SCI for all Continuous Access Synchronous Z M-VOLs (synchronous only)
that are suspended due to the CGROUP/FREEZE command. This IEA494I message indicates
the extended long busy state.
•
When the FREEZE option is enabled, the MCU reports SCI for a Continuous Access Synchronous
Z pair that is suspended due to a failure. When the host supports GDPS, this IEA494I message
with extended long busy triggers the CGROUP (FREEZE/RUN) command.
IEA494I and IEA491E console messages 93