3.5.1 Matrix Server Administration Guide

Configure the SAN

SAN configuration includes the following:

• Import or deport SAN disks. After a disk is imported, it can be used

for PSFS filesystems.

• Change the partitioning on SAN disks.

• Display information about SAN disks.

• Manage multipath I/O.

Overview

SAN Configuration Requirements

Be sure that your SAN configuration meets the requirements specified in

the PolyServe Installation Guide.

Storage Control Layer Module

The Storage Control Layer (SCL) module manages shared SAN devices. It

operates as a daemon (SCLd) running on each server in the matrix and is

created by the SANPulse daemon.

The primary function of the SCL module is to ensure that when a server

drops out of the matrix unexpectedly, it is physically disabled from

further access to the imported SAN storage devices. This step enables

Matrix Server to perform any needed filesystem recovery operations to

ensure filesystem integrity and then to continue running safely on the

remaining set of servers.