Failover, Failback, Failover failback – HP XP P9500 Storage User Manual
Page 410: Operating procedure during a primary site, Storage system failure
13. From the primary site, execute the YKRESYNC DELTAJNL command for the delta resync pair.
•
YKQUERY
•
YKRESYNC DELTAJNL
•
YKEWAIT GOTO(DUPLEX)
If the command is successful, the Continuous Access Journal Z copy pair at the local site and
the remote site is automatically moved to the HOLD status (delta resync pair).
Operation is returned to normal.
NOTE:
If during operation the status of a delta resync pair changes to HOLDTRNS, NODELTA,
or HOLDER, see
“Actions to be Taken When the Delta Resync Function Cannot be Set Up or
Operated Successfully” (page 428)
Operating Procedure During a Primary Site Storage System Failure (Nonvolatile)
The following are the procedures to be performed when the primary site storage system is in a
nonvolatile failure state.
Failover
The failover procedure to be performed when the primary site storage system is in a nonvolatile
failure state is the same as the failover procedure to be performed when the primary site storage
system is in a volatile failure state. See
in
Primary Site Storage System Failure (Volatile)” (page 404)
.
Failback
1.
Recover the primary site storage system from failure.
2.
From the local site, execute the YKDELETE command for the Continuous Access Journal Z
copy pair.
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Maintenance and troubleshooting operations