HP XP Racks - Manual (Page 405)

Operating procedure during a path failure between the storage systems at the primary
site and remote site 1, or at the primary site and remote site 2
The following are the operating procedures that must be performed when a path failure occurs
between the storage systems at the primary site and remote site 1, or at the primary site and remote
site 2.
Preparing
If a path failure occurs between the storage systems at the primary site and remote site 1 or at the
primary site and remote site 2, perform the same preparatory procedure as the one used when a
failure, with information lost from memory, occurs in the storage system at remote site 1 or remote
site 2. See
“Preparing” (page 395) in “Operating procedure during a storage system failure (with
information lost from memory) at remote site 1 or 2” (page 395) .
Recovering
If a path failure occurs between the storage systems at the primary site and remote site 1 or at the
primary site and remote site 2, perform the same recovery procedure as the one used when a
failure, with information lost from memory, occurs in the storage system at remote site 1 or remote
site 2. See
“Recovering” (page 395) in “Operating procedure during a storage system failure (with
information lost from memory) at remote site 1 or 2” (page 395) .
Using a Delta Resync Configuration
Table 107 (page 405) describes maintenance and troubleshooting operations for a delta resync
configuration.
Table 107 Using a Delta Resync Configuration
See Description Target
Maintenance
or Failure
“Performing Primary Site
Storage System
Maintenance” (page 406) Perform a delta resync, and then change the
configuration to a 2DC configuration (Local
→ Remote).
Primary site storage system
maintenance Maintenance
“Performing Local Site
Storage System
Maintenance” (page 412) Suspend Cnt Ac-S Z copy pairs, and then
change the configuration to a 2DC
configuration (Primary
→ Remote).
Local site storage system
maintenance
“Performing Remote Site
Storage System
Maintenance” (page 414) Suspend Cnt Ac-J Z copy pairs, and then
change the configuration to a 2DC
configuration (Primary
→ Local).
Remote site storage system
maintenance
“Performing Primary Site
Host Maintenance”
(page 416) Perform a Delta Resync, and then change the
configuration to a Delta Resync configuration
in which operation is performed from the local
site (Local
→ Primary, Local → Remote).
Primary site host
maintenance
— Operation in a delta resync configuration is
not affected. Local site host maintenance
— Operation in a delta resync configuration is
not affected. Remote site host
maintenance
“Operating procedure
during a primary site storage Perform a delta resync, and then change the
configuration to a 2DC configuration (Local Primary site storage system
failure (with information lost
from memory) Failure
system failure (with
→ Remote). During failback, Cnt Ac-S Z copy
information lost from
memory)” (page 421) pairs and Cnt Ac-J Z copy pairs must be
deleted and then recreated.
“Operating procedure
during a primary site storage Perform a delta resync, and then change the
configuration to a 2DC configuration (Local
→ Remote).
Primary site storage system
failure (with no information
lost from memory)
system failure (with no
Using a Delta Resync Configuration 405