HP XP P9500 Software User's Manual page 385

Table 87 Using a 4x4x4 Cascade Configuration (continued)
Maintenance or
Number Failure
8
9
10
1 1
12
13
Target Description
Primary site storage Suspend Continuous
system failure Access Synchronous Z
(nonvolatile) copy pairs, and then
change the
configuration to a 4x4
configuration
(Intermediate >
Remote).
Intermediate site Suspend Continuous
storage system failure Access Synchronous Z
(volatile) copy pairs by using
the Continuous Access
Synchronous Z
Consistency
Preservation function.
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.
Intermediate site Suspend Continuous
storage system failure Access Synchronous Z
(nonvolatile) copy pairs by using
the Continuous Access
Synchronous Z
Consistency
Preservation Function,
and then
resynchronize them.
Remote site storage Delete the Continuous
system failure (volatile) Access Journal Z copy
pairs whose S-VOLs
are in the storage
system in which the
failure occurred, and
then reregister the
EXCTG.
Remote site storage Resynchronize the
system failure Continuous Access
(nonvolatile) Journal Z copy pairs
whose S-VOLs are in
the storage system in
which the failure
occurred.
Primary site host Perform a reverse
failure resync for Continuous
Using a 4x4x4 Cascade Configuration 385
See
Operating procedure
during a primary site
storage system failure
(nonvolatile) on page
8–1 16
Operating procedure
during an intermediate
site storage system
failure (volatile) on
page 8–1 19
Operating procedure
during an intermediate
site storage system
failure (nonvolatile) on
page 8–124
Operating procedure
during a remote site
storage system failure
(volatile) on page
8–125
Operating procedure
during a remote site
storage system failure
(nonvolatile) on page
8–128
Operating procedure
during a primary site