Setup Guide

Parameter Description Value

multipath device or lowering it for the path devices can cause

multipath to create I/O operations larger than the path devices

allow. Using the max_sectors_kb parameter is an easy way to

set these values before a multipath device is created on top of

the path devices and prevent invalid-sized I/O operations from

being passed. If this parameter is not set by the user, the path

devices have it set by their device driver, and the multipath device

inherits it from the path devices.

NOTE: In PowerStore cluster the maximum I/O size is 1MB.

PowerStore does not set an optimal transfer size.

Configuring Oracle ASM

For proper functioning with Linux hosts using Oracle ASM with PowerStore, configure the Oracle ASM settings file.

Prerequisites

For a PowerStore cluster to function properly with Linux hosts that are using the Oracle ASM volume management software

with ASMLib driver, follow these steps to configure the /etc/sysconfig/oracleasm settings file:

Steps

1. Modify the following lines in the /etc/sysconfig/oracleasm file according to the multipathing used on the host:

# ORACLEASM_SCANORDER: Matching patterns to order disk scanning

ORACLEASM_SCANORDER=""

# ORACLEASM_SCANEXCLUDE: Matching patterns to exclude disks from scan

ORACLEASM_SCANEXCLUDE=""

● When DM-MPIO multipathing is used on the Linux host, edit these lines as follows:

# ORACLEASM_SCANORDER: Matching patterns to order disk scanning

ORACLEASM_SCANORDER="dm"

# ORACLEASM_SCANEXCLUDE: Matching patterns to exclude disks from scan

ORACLEASM_SCANEXCLUDE="sd"

● When PowerPath multipathing is used on the Linux host, edit these lines as follows:

# ORACLEASM_SCANORDER: Matching patterns to order disk scanning

ORACLEASM_SCANORDER="emcpower"

# ORACLEASM_SCANEXCLUDE: Matching patterns to exclude disks from scan

ORACLEASM_SCANEXCLUDE="sd"

2. Shutdown the Oracle instance running on the specific host.

3. Execute the following two commands to restart Oracle ASM:

/etc/init.d/oracleasm stop

/etc/init.d/oracleasm start

Post-Configuration Steps - Using the PowerStore

system

After the host configuration is completed, you can access the PowerStore system from the host.

You can create, present, and manage volumes accessed from the host via PowerStore Manager, CLI, or REST API. Refer to the

PowerStore Manager Online Help, CLI Reference Guide, or REST API Reference Guide for additional information.

Host Configuration for Linux