Owner's Manual

16 Deployment Guide
4 On each node , type:
more /proc/partitions
The node detects and displays the LUNs or logical disks, as well as the partitions created on those
external devices.
NOTE: The listed devices vary depending on how your storage is configured.
A list of the LUNs or logical disks that are detected by the node is displayed, as well as the partitions
that have been created on those external devices. PowerPath pseudo devices appear in the list, such as
/dev/emcpowera , /dev/emcpowerb , and /dev/emcpowerc .
5 In the /proc/partitions file, ensure that:
• All PowerPath pseudo devices appear in the file with similar device names across all nodes.
For example,
/dev/emcpowera , dev/emcpowerb , and /dev/emcpowerc .
• The Fibre Channel LUNs appear as SCSI devices, and each cluster node is configured with the
same number of LUNs.
For example, if the node is configured with a SCSI drive or RAID container attached to a Fibre
Channel storage device with three logical disks,
sda identifies the node’s RAID container or
internal drive, and
emcpowera , emcpowerb , and emcpowerc identifies the LUNs (or PowerPath
pseudo devices).
If the external storage devices do not appear in the
/proc/partitions file, reboot the node.
Configuring Shared Storage for Clusterware
This section provides instructions for configuring the shared storage for Oracle Clusterware.
Configuring Shared Storage Using the RAW Device Interface
1 On the first node, create three partitions on an external storage device with fdisk :
Ty p e
fdisk /dev/emcpowerx and create three partitions of 150 MB each for the Cluster
Repository, voting disk, and the Oracle system parameter file.
2 Verify the new partitions by typing:
more /proc/partitions
If the new partitions appear in the /proc/partitions file, type:
sfdisk -R /dev/<device name>
3 On each node , perform the following steps:
a Edit the /etc/sysconfig/rawdevices file and add the following lines for a Fibre Channel cluster:
/dev/raw/votingdisk /dev/emcpowera1
/dev/raw/ocr.dbf /dev/emcpowera2
/dev/raw/spfile+ASM.ora /dev/emcpowera3