HP XP Racks User Manual
Page 488
Table 112 Using a 4x4x4 Cascade Configuration
See
Description
Target
Maintenance
or Failure
“Performing primary site storage
system maintenance” (page 489)
Suspend Continuous Access Synchronous
Z copy pairs, and then change the
Primary site storage
system maintenance
Maintenance
configuration to a 4x4 configuration
(Intermediate
→ Remote).
“Performing intermediate site
storage system maintenance”
(page 493)
Suspend Continuous Access Synchronous
Z copy pairs, and then resynchronize
them after maintenance has finished.
Intermediate site storage
system maintenance
“Performing remote site storage
system maintenance” (page 497)
Suspend Continuous Access Journal Z
copy pairs, and then resynchronize them
after maintenance has finished.
Remote site storage
system maintenance
“Performing primary site host
maintenance” (page 499)
Perform a reverse resync on Continuous
Access Synchronous Z copy pairs, and
Primary site host
maintenance
then change the configuration to a 4x4x4
Multi- Target configuration in which
operation is performed from the
intermediate site.
—
Operation in the 4x4x4 Cascade
configuration is not affected.
Intermediate site host
maintenance
—
Operation in the 4x4x4 Cascade
configuration is not affected.
Remote site host
maintenance
“Operating procedure during a
primary site storage system
Suspend Continuous Access Synchronous
Z copy pairs, and then change the
Primary site storage
system failure (with
Failure
failure (with information lost
from memory)” (page 504)
configuration to a 4x4 configuration
(Intermediate
→ Remote). The Continuous
information lost from
memory)
Access Synchronous Z copy pairs whose
S-VOLs are in the storage system in which
the failure occurred must be deleted and
then recreated.
“Operating procedure during a
primary site storage system
Suspend Continuous Access Synchronous
Z copy pairs, and then change the
Primary site storage
system failure (with no
failure (with no information lost
from memory)” (page 509)
configuration to a 4x4 configuration
(Intermediate
→ Remote).
information lost from
memory)
“Operating procedure during
an intermediate site storage
Suspend Continuous Access Synchronous
Z copy pairs by using the Continuous
Intermediate site storage
system failure (with
system failure (with information
lost from memory)” (page 512)
Access Synchronous Z Consistency
Preservation function. The Continuous
information lost from
memory)
Access Synchronous Z copy pairs whose
S-VOLs are in the storage system in which
the failure occurred must be deleted and
then recreated.
“Operating procedure during
an intermediate site storage
Suspend Continuous Access Synchronous
Z copy pairs by using the Continuous
Intermediate site storage
system failure (with no
Access Synchronous Z Consistency
information lost from
memory)
information lost from memory)”
(page 518)
Preservation Function, and then
resynchronize them.
“Operating procedure during a
remote site storage system
Delete the Continuous Access Journal Z
copy pairs whose S-VOLs are in the
Remote site storage
system failure (with
failure (with information lost
from memory)” (page 519)
storage system in which the failure
occurred, and then reregister the EXCTG.
information lost from
memory)
“Operating procedure during a
remote site storage system
Resynchronize the Continuous Access
Journal Z copy pairs whose S-VOLs are
Remote site storage
system failure (with no
failure (with no information lost
from memory)” (page 522)
in the storage system in which the failure
occurred.
information lost from
memory)
488 Maintenance and troubleshooting operations