HP XP Racks - Manual (Page 489)

Table 112 Using a 4x4x4 Cascade Configuration (continued)
See Description Target
Maintenance
or Failure
“Operating procedure during a
primary site host failure”
(page 523) Perform a reverse resync for Continuous
Access Synchronous Z copy pairs, and
then change the configuration to a 4x4x4 Primary site host failure
Multi-Target configuration in which
operation is performed from the
intermediate site.
“Operating procedure during a
path failure between the primary Suspend Continuous Access Synchronous
Z copy pairs by using the Continuous Path failure between the
Primary
→ Intermediate
storage systems site storage system and the Access Synchronous Z Consistency
intermediate site storage system”
(page 527) Preservation function, and then
resynchronize them.
NOTE: The term "storage system failure, with information lost from memory," indicates a failure
that causes the loss of information in memory. In such a failure, the copy pair information and the
data are completely lost, so the hardware information must be reconfigured.
This section provides maintenance and troubleshooting procedures for 3DC Cascade (URxUR)
configurations.
The figures in the procedures in this section use the following legend.
The bullet lists under the figures in the procedures show the commands that must be executed.
Performing primary site storage system maintenance
The following are the procedures for performing primary site storage system maintenance.
Failover
1. Stop operation at the primary site.
2. From the intermediate site, execute the YKSUSPND REVERSE command for the Continuous
Access Synchronous Z copy group container.
Using a 4x4x4 Cascade Configuration 489