HP XP P9500 Storage User Manual
Page 455
Execute the YKRESYNC DELTAJNL ERRCHK command for the delta resync pair.
•
YKQUERY
•
YKRESYNC DELTAJNL ERRCHK
If the YKRESYNC DELTAJNL ERRCHK command completes successfully, delta resync will succeed
and the YKRESYNC DELTAJNL command can be performed safely.
If an error message (YKZ251E, YKZ253E, YKZ255E, or YKZ257E) is produced after the YKRESYNC
DELTAJNL ERRCHK
command was executed, delta resync cannot be performed due to the cause
indicated in the message. Read the message and remove the cause of the error. Then execute the
YKRESYNC DELTAJNL
command to perform delta resync.
Delta resync can only be performed if all of the conditions in
are satisfied.
Execute the YKQUERY command for the Cnt Ac-S Z copy pair, Cnt Ac-J Z copy pair, and delta
resync pair to confirm that all conditions are satisfied. If all conditions are not satisfied, perform
copy pair operations.
Table 109 Required Conditions to Perform Delta Resync
How to check
Condition
No.
Execute the YKQUERY command for the delta resync
pair, and then check the copy pair status.
The pair status of all delta resync pairs is either
HOLD or NODELTA. Note that only delta resync with
full copy (the YKRESYNC ALLJNL command) can
1
be performed for a delta resync pair with the
NODELTA status.
Execute the YKQUERY command for the Cnt Ac-S Z
pair, and then check the copy direction and copy
pair status.
Either of the following is true for all Cnt Ac-S Z
pairs:
2
•
The copy direction is from the primary site
toward the local site (from the local site toward
the primary site during failback) and the pair
status is SWAPPING.
•
The copy direction is from the local site toward
the primary site (from the primary site toward
the local site during failback) and the pair status
is DUPLEX.
Execute the YKQUERY command for the Cnt Ac-J Z
pair, and then check the copy direction and copy
pair status.
All Cnt Ac-J Z pairs have the copy direction from
the primary site to the remote site (from the local
site to the remote site during failback) and have the
pair status of DUPLEX, SUSPOP, SUSPER, or
SUSPCU.
3
Execute the YKQRYPTH command, and then confirm
that there are no path status errors.
The inter-DKC path between the P-VOL and the
S-VOL of a delta resync pair is functioning without
error.
4
Execute the YKQRYDEV command or check from the
system to make sure that the S-VOL of a delta resync
pair is not online
The S-VOL of a delta resync pair is not online.
5
Using a Delta Resync Configuration 455