Failover, Failback, Failover failback – HP XP P9500 Storage User Manual

Page 410: Operating procedure during a primary site, Storage system failure

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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

“Failover” (page 405)

in

“Operating Procedure During a

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.

410

Maintenance and troubleshooting operations

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