Owner's Manual

Deployment Guide 35
Adding a New Node to the Network Layer
To add a new node to the network layer:
1 Install the Red Hat Enterprise Linux operating system on the new node. See "Installing and
Configuring Red Hat Enterprise Linux" on page 7.
2 Configure the public and private networks on the new node. See "Configuring the Public and
Private Networks" on page 12.
3 Verify that each node can detect the storage LUNs or logical disks. See "Verifying the Storage
Configuration" on page 16.
Configuring the Shared Storage on the New Node
To extend an existing RAC database to your new nodes, configure storage for the new nodes so that
the storage is the same as on the existing nodes. This section provides the appropriate procedures
for either ASM or OCFS.
Configuring Shared Storage Using ASM
If you are using ASM, ensure that the new nodes can access the ASM disks with the same
permissions as the existing nodes.
To configure the ASM disks:
1 Log in as root .
2 If your existing nodes were not configured using raw devices, go to step 3.
If your existing nodes were configured using raw devices for CRS:
a Type the following commands to change the names of the raw character devices to make
them identifiable:
mv /dev/raw/raw1 /dev/raw/votingdisk
mv /dev/raw/raw2 /dev/raw/ocr.dbf
mv /dev/raw/raw3 /dev/raw/spfile+ASM.ora
b Type the following commands to set user oracle ownership of the Cluster Repository
and voting disk:
chown oracle.dba /dev/raw/votingdisk
chown oracle.dba /dev/raw/ocr.dbf
chown oracle.dba /dev/raw/spfile+ASM.ora
3
Type the following commands to change the names of the raw character devices and make
them identifiable as configured on the existing nodes:
mv /dev/raw/raw4 /dev/raw/ASM1
mv /dev/raw/raw5 /dev/raw/ASM2