Performing primary site storage system maintenance, Failover – HP XP Racks User Manual
Page 352
Table 105 Using a 3DC Cascade (Cnt Ac-J Z x Cnt Ac-J Z) configuration (continued)
See:
Description
Target
Maintenance
or failure
“Operating procedure
during a path failure
Create a Continuous Access Journal Z copy pair between
the primary site and the remote site, and then change the
Path failure between
the storage systems at
configuration to a 2DC configuration (Primary
→ Remote).
the primary site and
the intermediate site
at the primary site and the
intermediate site” (page 371)
During recovery, the Continuous Access Journal Z copy pair
between the intermediate site and the remote site must be
re-created.
“Operating procedure
during a path failure
After error recovery, resynchronize the Continuous Access
Journal Z copy pair between the intermediate site and the
remote site.
Path failure between
the storage systems at
the intermediate site
and the remote site
between the storage systems
at the intermediate site and
the remote site” (page 372)
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 (Cnt Ac-J Z
x Cnt Ac-J Z) 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 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 Journal Z copy pair between the primary site and the intermediate site.
•
YKQUERY
•
YKSUSPND REVERSE
•
YKEWAIT GOTO(SUSPEND)
3.
Start primary site storage system maintenance.
352 Maintenance and troubleshooting operations