Using Serviceguard Extension for RAC, 5th Edition, June 2007

Serviceguard Configuration for Oracle 10g RAC
Creating a Storage Infrastructure with LVM
Chapter 2 79
PVG-strict, that is, it occurs between different physical volume groups;
the -n system.dbf option lets you specify the name of the logical
volume; and the -L
408 option allocates 408 megabytes.
If Oracle performs resilvering of RAC data files that are mirrored logical
volumes, choose a mirror consistency policy of “NONE” by disabling both
mirror write caching and mirror consistency recovery. With a mirror
consistency policy of “NONE”, SLVM does not perform the
resynchronization.
NOTE Contact Oracle to determine if your version of Oracle RAC allows
“resilvering” and to appropriately configure the mirror consistency
recovery policy for your logical volumes.
Create logical volumes for use as Oracle data files by using the same
options as in the following example:
# lvcreate -m 1 -M n -c n -s g -n system.dbf -L 408 \
/dev/vg_ops
The -m 1 option specifies single mirroring; the -M n option ensures that
mirror write cache recovery is set off; the -c n means that mirror
consistency recovery is disabled; the -s g means that mirroring is
PVG-strict, that is, it occurs between different physical volume groups;
the -n system.dbf option lets you specify the name of the logical
volume; and the -L
408 option allocates 408 megabytes.
If the command is successful, the system will display messages like the
following:
Logical volume “/dev/vg_ops/system.dbf” has been successfully
created
with character device “/dev/vg_ops/rsystem.dbf”
Logical volume “/dev/vg_ops/system.dbf” has been successfully
extended
NOTE The character device file name (also called the raw logical volume name)
is used by the Oracle DBA in building the OPS database.