Recovering, Preparing, Preparing recovering – HP XP Racks User Manual
Page 372: Operating procedure during a path failure
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
in
“Operating procedure during an intermediate site storage
system failure (with no information lost from memory)” (page 364)
.
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
in
.
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
in
.
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
“Performing primary site
storage system
maintenance” (page 374)
Create a Continuous Access Journal Z copy pair
between remote sites 1 and 2, and then change the
configuration to a 2DC configuration (Remote 1
→
Remote 2, or Remote 2
→ Remote 1).
Primary site storage system
maintenance
Maintenance
“Performing storage system
maintenance for remote site
1 or 2” (page 379)
Suspend the Continuous Access Journal Z copy pair
between the primary site and the maintenance-target
remote site, and then change the configuration to a
Storage system maintenance
for remote site 1 or remote
site 2
2DC configuration consisting of the primary site and
the other remote site.
“Performing primary site host
maintenance” (page 381)
Delete the Continuous Access Journal Z copy pair
between the primary site and the remote site that is
Primary site host
maintenance
not the failover destination, and then reverse the copy
372 Maintenance and troubleshooting operations