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28 SVA Path User’s Guide

where <x> is the numerical element of the spd number and <n> is

the interval between the retries specified by the retry count

parameter.

Turning Failback Off

and On

The syntax for changing the a device’s failback mode is

setsp -l<x> -f{0|1}

where <x> is the spd number (see “Specifying a Device for setsp”

on page 25) and the

-f option takes one of two arguments:

•

-f0 turns failback off;

•

-f1 turns failback on.

Dynamic Device Detection

You may be able to add new storage devices and place them under

SVA Path's control without requiring a reboot of the host. This is

also known as dynamic LUN allocation.

To add a fibre channel device to an existing path perform the

following steps after the devices are connected:

1. Run

ioscan and verify that the new storage resource is rec-

ognized by the system:

# ioscan -fn

2. Run the insf command to generate the special device files

for the new storage:

# insf -e

3. Have SVA Path scan the new device for alternate paths:

# sppath -v

4. Create a SVA Path configuration file that includes the new

device:

# setsp -g

# setsp -T -l <new_spd_number>

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 67 68

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Seagate ST39103LC Guida Utente Pagina 38