HP P9000 Business Continuity Manager User Guide

Table 22 Differences in functionality between the NORMAL ATTIME suspend function and the CAJ
ATTIME suspend function
CAJ ATTIME suspend functionNORMAL ATTIME suspend
function
Points of comparisonNo.
Linkage of Cnt Ac-J Z copy
groups and BC Z copy groups
with C/T group ID specified
Target copy groups1
• Cnt Ac-A copy groups
• BC Z copy groups with C/T
group ID specified
LocalExecution environment2
• Remote
• Local
The time is determined by the
timestamp of the journal to be
The time is determined by the
timestamp of an I/O to the
P-VOL.
Times when suspension is
executed
3
reflected to the Cnt Ac-J Z
S-VOL.
The user can specify this item.
The default time is determined
by the storage system.
The user cannot specify this
item.
Timeout time4
The status of the copy group to
be suspended can be
acquired.
Acquisition of the status5
• The status of the BC Z copy
group to be suspended can
be acquired.
• The status of the Cnt Ac-J Z
copy group can be checked
when the BC Z copy group
is suspended. If an error
has occurred, a message is
output.
A maximum of three BC Z copy
groups with a C/T group ID
A maximum of three S-VOLs
can be defined for a single BC
The number of BC Z
generations
6
specified can be linked to a
single Cnt Ac-J Z journal group.
Z P-VOL, and ATTIME
suspension can be reserved for
each S-VOL.
Functions that Acquire Volume Information
Before you can configure Business Continuity Manager, you must acquire the volume information
from the storage systems on the local and remote sites. Although you can do this by locating and
entering the hardware configuration definition information manually, it is easier to perform a scan
on the storage systems on each of the sites for this information when defining the copy group.
Local Scan
The function that acquires disk configuration information on the following volumes is called a local
scan: volumes recognized by the operating system (Gen'ed volumes) among all of the volumes on
a storage system that is directly connected to a host. To perform a local scan, use the YKSCAN
command.
Remote Scan
To acquire disk configuration information about a remote storage system, perform a function called
a remote scan. A remote scan can be used to define copy groups, even for configurations with
remote storage systems, such as a 3DC operation.
Because the remote scan uses the Remote DKC Control Function, it is necessary to set a command
device and a route list. Also, the disk configuration information acquired by the remote scan does
not have device numbers (DEVN) that are host attributes, because the information is from a storage
90 Understanding Business Continuity Manager functions