HP XP P9500 Storage - Manual (Page 373)

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
failure, with no information lost from memory, occurs in the intermediate site storage system. For
details, see
“Recovering” (page 366) in “Operating procedure during an intermediate site storage
system failure (with no information lost from memory)” (page 365) .
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 failure, with no information lost from
memory, occurs in the remote site storage system. See
“Preparing” (page 369) in “Operating
procedure during a remote site storage system failure (with no information lost from memory)”
(page 369)
.
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 failure, with no information lost from
memory, occurs in the remote site storage system. See
“Recovering” (page 370) in “Operating
procedure during a remote site storage system failure (with no information lost from memory)”
(page 369)
.
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 106 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 376) 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 381) configuration consisting of the primary site
and the other remote site.
Using a 3DC Multi-Target (Cnt Ac-J Z x Cnt Ac-J Z) configuration 373