Command Reference Guide

Chapter 1: Matrix Server Commands 20

option is useful if the matrix includes old membership partitions that are

marked active or if you want to import a disk that contains an active

membership partition.

Clear the Host Registry

This option removes all entries from the server registry.

CAUTION: Before clearing the server registry, be sure to reboot or power

off any servers that were previously removed from the matrix and

no longer had access to the SAN. After the servers have been

rebooted, they can safely access the SAN. (If the servers are not

rebooted, it is possible for them to corrupt filesystems.)

mxmpio – monitor or manage MPIO devices

Synopsis

/opt/polyserve/bin/mxmpio command [options...] [parameters ...]

[PSD-devices ...]

Description

Matrix Server uses multipath I/O (MPIO) to eliminate single points of failure.

A matrix can include multiple FibreChannel switches, multiple FC ports per

server, and multiported SAN disks. This configuration provides multiple

paths for I/O between matrix servers and SAN disks.

When you start Matrix Server, it automatically configures all paths from each

matrix server to the storage devices. On each server, it uses the first path it

discovered for I/O with the SAN devices. If that path fails, Matrix Server

automatically fails over the I/O to another path.

The mxmpio command can be used to display status information about

MPIO devices or to control the path used for I/O. With the exception of

enableall and disableall, all commands take PSD device names to operate on

specific devices. If you do not specify a PSD device, the command operates on

all devices.

The options are:

-l

Long option. Provides more detail about targets. This option does not

apply to enableall or disableall.