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Chapter 3. SVA Path Operation 25

default value is 3000 ms. This value can not be set above

100,000 ms (100s).

•

FailBack indicates whether failback is enabled for the

logical device. When failback is enabled (the default setting

of 1), SVA Path will keep testing a path that has failed and

return it to service (as the primary path or in sequential load

balancing) as soon as the path has been restored.

If the default configuration is satisfactory, no reconfiguration of

SVA Path is necessary.

In addition to the information defined by the setsp -a output's

column headings, the last part of the last line for each device (ID=)

shows the physical device's unique identifier, which is derived

from the device's inquiry data.

Changing the Configuration

The information displayed by setsp -a is stored in the

configuration file

/etc/spd.conf, which should never be edited

directly. User-configurable parameters must be changed

exclusively through the

setsp command options provided for

that purpose and are described in more detail in the following

sections.

Specifying a Device

for setsp

To name a specific device in any setsp command, use the

-l

option (note that this is a lowercase letter L, and not the number 1)

followed by the device's spd number, as expressed in the syntax

illustrations used in the remainder of this chapter as

-l<x>. A

device's spd number is listed in the first column of the setsp -a

output (See setsp -a example on page 16).

Leaving out the

-l option will apply the command to all of the

devices. However, more than one device must never be explicitly

specified in a given command. Also, whether you are applying the

configuration command to a single device or to all the devices,

only one parameter can be changed per command.

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Seagate ST39103LC Guida Utente Pagina 35