HP XP P9500 Storage - Manual (Page 353)

However, step 1 is different. From the intermediate site, execute the YKDELETE command for the
Continuous Access Journal Z copy pair between the intermediate site and the remote site.
Recovering
For details about the recovering procedure required when a path failure occurs between the storage
systems at the primary site and the intermediate site, see the recovery procedure used when a
nonvolatile failure occurs in the intermediate site storage system. For details, see
“Recovering”
(page 346) in “Operating procedure during an intermediate site storage system failure (nonvolatile)”
(page 345) .
However, there is no need to perform step 2.
Operating procedure during a path failure between the storage systems at the
intermediate site and the remote site
The following are the operating procedures that must be performed when a path failure occurs
between the storage systems at the intermediate site and the remote site.
Preparing
If a path failure occurs between the storage systems at the intermediate site and the remote site,
perform the same preparatory procedure that is used when a nonvolatile failure occurs in the
remote site storage system. See
“Preparing” (page 349) in “Operating procedure during a remote
site storage system failure (nonvolatile)” (page 349) .
Recovering
If a path failure occurs between the storage systems at the intermediate site and the remote site,
perform the same recovery procedure that is used when a nonvolatile failure occurs in the remote
site storage system. See
“Recovering” (page 350) in “Operating procedure during a remote site
storage system failure (nonvolatile)” (page 349) .
Using a 3DC Multi-Target (Cnt Ac-J Z x Cnt Ac-J Z) configuration
The following table explains how to perform maintenance for a 3DC Multi-Target (Cnt Ac-J Z x Cnt
Ac-J Z) configuration and how to take action if a failure occurs.
For maintenance or troubleshooting for the primary site storage system, either of the two remote
sites can be selected as the failover destination. If a primary site storage system failure occurred,
you can view the consistency time of each Continuous Access Journal Z copy pair to select the site
that has the latest data update time as the failover destination.
Table 101 Using a 3DC Multi-Target (Cnt Ac-J Z x Cnt Ac-J Z) configuration
See: Description Target Maintenance
or failure No.
“Performing
primary site Create a Continuous Access Journal Z copy
pair between remote sites 1 and 2, and then Primary site storage system maintenance Maintenance 1
storage system change the configuration to a 2DC
maintenance”
(page 355) configuration (Remote 1
→ Remote 2, or
Remote 2
→ Remote 1).
“Performing
storage system Suspend the Continuous Access Journal Z
copy pair between the primary site and the Storage system maintenance for remote site
1 or remote site 2 2
maintenance maintenance-target remote site, and then
for remote site change the configuration to a 2DC
1 or 2”
(page 361) configuration consisting of the primary site
and the other remote site.
“Performing
primary site Delete the Continuous Access Journal Z copy
pair between the primary site and the remote Primary site host maintenance 3
host site that is not the failover destination, and
Using a 3DC Multi-Target (Cnt Ac-J Z x Cnt Ac-J Z) configuration 353