Procedure for creating a delta resync pair, Procedure for creating a delta – HP XP P9500 Storage User Manual
Page 150
NOTE:
After the delta resync operation completes and the pair status has changed to Duplex,
and, when the Cnt Ac-J Z or Cnt Ac-S Z pair is resynchronized, then the delta resync P-VOL must
be updated from the host for a period of longer than five minutes. This is required to ensure internal
communications between the systems. This requirement also applies to all pairs in the journal in
which the Cnt Ac-J Z pair for delta resync resides.
However, this requirement can be eliminated by using remote command devices. See
remote command devices ” (page 152)
for details.
Prerequisite information for creating delta resync pairs
•
A Cnt Ac-J Z delta resync pair is created in a 3DC multi-target configuration only.
•
A 3DC multi-target configuration with multiple primary and secondary systems cannot be used
for delta resync.
•
Use the Cnt Ac-S Z S-VOL in Duplex status as the delta resync P-VOL.
•
Use a Cnt Ac-J Z S-VOL that is in Duplex status as the delta resync S-VOL.
•
The mirror ID must be between 1 and 3; however, make sure it is not the same as the mirror
ID assigned to the Cnt Ac-J Z pair in the 3DC multi-target configuration.
•
Follow volume combinations shown in
“Volume types that can be shared with Continuous
.
•
System option mode 506 must be ON for delta resync.
•
If you create more than one Cnt Ac-J Z pair for delta resync, the delta resync P-VOLs in the
same master journal must:
◦
Use the same mirror ID
◦
Are paired with S-VOLs in the same restore journal
◦
If you plan to create in-system pairs on the remote site sharing the delta resync S-VOL,
make sure to perform the delta resync create-pair operation first, then create in-system
pairs.
◦
You can set a back-up option in the event that the delta resync operation fails. This is
done on the Change Mirror Options window (see the Delta resync Failure step in
).
Procedure for creating a delta resync pair
Procedure 39 To create a Continuous Access Journal Z pair for delta resync pair
1.
Install and set up Cnt Ac-S Z and Cnt Ac-J Z on the required systems.
2.
Create a Cnt Ac-S Z pair on the primary system, following the information in the following
topics:
•
“Prerequisite information for 3DC multi-target ” (page 148)
•
“Prerequisite information for creating delta resync pairs ” (page 150)
3.
After the Cnt Ac-S Z pair status is Duplex, create the Cnt Ac-J Z pair on the primary system,
following the information in the following topics:
•
“Prerequisite information for 3DC multi-target ” (page 148)
•
“Prerequisite information for creating delta resync pairs ” (page 150)
4.
Create a second Cnt Ac-J Z pair from the Cnt Ac-S Z S-VOL to the Cnt Ac-J Z S-VOL. Specify
the Initial Copy option as Delta.
150
Configurations with Continuous Access Synchronous Z