Veritas Storage Foundation for Oracle 5.0 Administrator's Guide, HP-UX 11i v3, Second Edition, December 2008

Table 13-1
Parameter values for dbed_vmchecksnap (continued)
ValueParameter
yes or no
By default, reverse resynchronization is off (set equal to
no). If it is set to yes, data from the snapshot volume can
be used to update the primary volume.
ALLOW_REVERSE_RESYNC
Specifies the number of plexes to be snapshot. The default
value is 1.
SNAPSHOT_MIRROR
When you first run dbed_vmchecksnap, use the -o setdefaults option to create
a snapplan using default values for variables. You may then edit the file manually
to set the variables for different snapshot scenarios.
Before creating a snapplan, make sure the following conditions have been met:
■ Storage must be configured properly.
See “Hosts and storage for Database FlashSnap ” on page 223.
■ You must be the Oracle database administrator.
■ The disk group must be version 110 or later. For more information
on disk group versions, see the vxdg(1M) manual page.
■ Be sure that a DCO and DCO volume are associated with the volume
for which you are creating the snapshot.
■ Snapshot plexes and their associated DCO logs should be on
different disks than the original plexes, and should be configured
correctly for creating snapshots by the system administrator.
■ Persistent FastResync must be enabled on the existing database
volumes and disks must be assigned for the snapshot volumes.
■ The database must be running in archive log mode. Archive log
mode is set in the Oracle initialization parameter file (init.ora).
■ The Oracle database must have at least one mandatory archive
destination.
See “Establishing a mandatory archive destination” on page 254.
■ ORACLE_HOME cannot reside on disk which will be used for
snapshot.
Prerequisites
Using Database FlashSnap for backup and off-host processing
Creating a snapplan (dbed_vmchecksnap)
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