HP XP P9500 Storage - Manual (Page 492)

Table 112 Using a 4x4x4 Cascade Configuration
See Description Target
Maintenance or
Failure
Number
“Performing primary
site storage system Suspend Continuous
Access Synchronous Z Primary site storage
system maintenance Maintenance 1
maintenance”
(page 494) copy pairs, and then
change the
configuration to a 4x4
configuration
(Intermediate
→
Remote).
“Performing
intermediate site Suspend Continuous
Access Synchronous Z Intermediate site
storage system
maintenance 2
storage system copy pairs, and then
maintenance”
(page 498) resynchronize them
after maintenance has
finished.
“Performing remote
site storage system Suspend Continuous
Access Journal Z copy Remote site storage
system maintenance 3
maintenance”
(page 502) pairs, and then
resynchronize them
after maintenance has
finished.
“Performing primary
site host maintenance”
(page 504) Perform a reverse
resync on Continuous
Access Synchronous Z Primary site host
maintenance 4
copy pairs, and 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 5
— Operation in the 4x4x4
Cascade configuration
is not affected. Remote site host
maintenance 6
“Operating procedure
during a primary site Suspend Continuous
Access Synchronous Z Primary site storage
system failure (with Failure 7
storage system failure copy pairs, and then information lost from
memory)
(with information lost change the
from memory)”
(page 509) configuration to a 4x4
configuration
(Intermediate
→
Remote). The
Continuous 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 Suspend Continuous
Access Synchronous Z Primary site storage
system failure (with no 8
storage system failure copy pairs, and then information lost from
memory)
(with no information change the
492 Maintenance and troubleshooting operations