HP XP P9000 Continuous Access Synchronous for Mainframe Systems User Guide

You should prepare for file and database recovery using files for file recovery (for example,
database log files that have been verified as current). You can also use the sense information with
system time stamp that is transferred via ERC.
CSUSPEND/QUIESCE TSO command
See the IBM documents SG24 2595, SC35 0355, and SC35 0169 for important information
about the optional QUIESCE parameter for the CSUSPEND TSO command.
The QUIESCE option of the CSUSPEND command has been disabled by APAR OW15247 or APAR
OW15248. Refer to either of these APARs and the latest IBM PPRC documentation for detailed
information about the QUIESCE option of the CSUSPEND command. Please check with your HP
account team before using the CSUSPEND command with the QUIESCE option to suspend Cnt
Ac-S Z pairs on XP P9500 storage systems. If the CSUSPEND command with the QUIESCE option
is issued to certain volumes (for example, active SPOOL, PAGE, or CATALOG datasets, active
SYSRES volume), the attached hosts may enter a deadlock condition and may require a storage
control IML to correct the condition.
IEA494I system console message
The IEA494I message is recommended as a trigger for automation over the IEA491E message,
because the IEA494I message is reported to all attached MVS hosts each time the P-VOL pair status
changes, whereas the IEA491E message is reported to only one host system.
Switching operations to the secondary site
If a disaster or failure occurs at the primary site, the first disaster recovery activity is to switch your
operations to the remote or secondary site. S-VOLs are recovered individually based on the pair
status and P-VOL fence level information for each pair.
Procedure 26 To switch operations to the secondary site:
1. Record the pair status and fence level of each S-VOL.
2. Analyze the currency of the S-VOLs, based on pair status and P-VOL fence level setting. See
“Checking S-VOL currency with the P-VOL” (page 106).
3. Perform file recovery as needed.
4. Change the state of S-VOLs to simplex by issuing the CRECOVER TSO command.
5. If PPRC is not installed, connect to each RCU, and release all Continuous Access Synchronous
Z pairs. Release all Continuous Access Synchronous Z sync pairs in the MCU using the Deleting
Mode All option.
CAUTION: If necessary, use ICKDSF REFORMAT to change the labels (VOLSERs) of the
S-VOLs.
6. At the remote or secondary site, connect to each remote system and release all Continuous
Access Synchronous Z pairs.
When an S-VOL changes to simplex, you cannot distinguish it from a non-Continuous Access
Synchronous Z simplex volume. If necessary, use the volume manager to change the volume
labels of the S-VOLs.
7. Complete file recovery procedures.
8. When file recovery procedures have been completed, vary the S-VOLs online.
9. If an IPL of the remote host system is not required, bring the S-VOLs online. If an IPL is required:
1. Clear the remote copy SIMs from the RCUs before OS IPL. Connect to each RCU, open
the Continuous Access Synchronous Z System Option window, and click Clear SIM.
2. Perform an IPL of the remote host system.
3. Wait until the IPL is complete, and then vary the S-VOLs online (if they did not come online
automatically).
Switching operations to the secondary site 105