Performing Primary Site Storage System Maintenance
This subsection explains the procedures for performing primary site storage system maintenance.
The procedure in this section uses the following legend:
Failover for Primary Site Storage System Maintenance
To perform failover:
1. Stop operation on the primary site.
2. From the local site, execute the YKSUSPND FLUSH command for the Continuous Access
Journal for Mainframe copy pair between the primary site and the remote site.
• YKQUERY
• YKSUSPND FLUSH
• YKEWAIT GOTO(SUSPEND)
3. From the local site, execute the YKSUSPND REVERSE command for the Continuous Access
Synchronous for Mainframe copy pair.
• YKQUERY
• YKSUSPND REVERSE
• YKEWAIT GOTO(SUSPND)
Operation at the local site can be started before executing the YKRESYNC DELTAJNL
command. However, the time it takes for the delta resync pairs between the local site and the
remote site to change to the DUPLEX status after execution of the YKRESYNC DELTAJNL
command increases depending on the amount of update data from the local site.
300 Maintenance and Troubleshooting Operations
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