IBM Partner Pavilion DS4100 Benutzerhandbuch

valid

for

the

drive

loop.

The

amber

Conflict

LED

(located

on

the

right-side

of

the

switch)

will

be

lit

if

another

unit

in

the

drive

loop

has

the

same

ID

setting

as

the

server

ID.

Attention:

When

connecting

the

DS4100

to

DS4000

EXP100

storage

expansion

units,

DO

NOT

use

the

tens

digit

(x10)

setting.

Use

only

the

ones

digit

(x1)

setting

to

set

unique

server

IDs

or

enclosure

IDs.

Give

each

drive

expansion

enclosure

in

a

redundant

drive

loop

a

unique

ones

digit

(x1)

ID.

This

setting

will

enforce

hard

AL_PAs

(unchangeable

between

fibre

channel

Loop

Initializations

[LIPs])

for

the

drives

and

facilitate

drive

loop

problem

troubleshooting

in

the

event

of

an

error.

If

the

ones

digits

are

not

unique,

two

or

more

devices

will

have

the

same

hard

AL_PA.

In

such

a

case,

the

controller

will

use

soft

AL_PAs

for

the

devices

that

have

identical

hard

AL_PAs.

The

problem

with

soft

addressing

is

that

addresses

may

change

between

LIPs.

This

possibility

increases

the

difficulty

of

troubleshooting

drive

loop

problems,

since

one

cannot

easily

ascertain

whether

the

same

device

with

a

different

address

or

different

device

may

be

causing

a

problem.

Storage

server

speed

settings

The

default

switch

setting

is

2

Gbps.

This

is

the

only

speed

setting

allowed

for

the

DS4100.

Attention:

Do

not

remove

the

metal

plate

that

covers

the

storage

server

speed

setting.

Do

not

adjust

the

storage

server

speed

setting.

Configuring

the

storage

subsystem

You

must

configure

the

storage

subsystem

configuration

after

you

install

the

storage

server

in

a

rack

cabinet.

Use

the

information

in

the

following

sections

to

configure

your

storage

subsystem

configuration.

Storage

subsystem

management

methods

Before

you

configure

the

storage

subsystem,

determine

which

method

of

storage

subsystem

management

you

want

to

use.

You

can

manage

the

storage

subsystems

in

either

of

two

ways:

host-agent

(in-band)

management

or

direct

(out-of-band)

management.

Important:

If

the

operating

system

of

the

host

server

that

the

storage

subsystem

logical

drive(s)

is

mapped

to

is

not

Microsoft

®

Windows

NT

®

,

you

have

to

make

a

direct

(out-of-band)

management

connection

to

the

storage

subsystem

to

set

the

correct

host

type

first.

Then,

the

server

will

be

able

to

recognize

the

storage

subsystem

correctly

for

host-agent

(in-band)

management.

Host-agent

(in-band)

management

method

This

method

requires

host-agent

software

that

you

install

on

the

host

server.

The

host-agent

software

allows

the

DS4000

Storage

Manager

client

program

to

manage

the

DS4000

storage

subsystem

using

the

same

fibre

channel

connections

between

the

host

server

and

the

storage

subsystem.

You

must

install

at

least

one

management

station

and

a

software

agent

host.

The

management

station

can

be

the

host

or

a

workstation

on

the

Ethernet

network.

A

management

station

will

have

the

client

software

installed.

shows

the

host-agent

(in-band)

management

method.

34

IBM

TotalStorage

DS4100

Storage

Server:

Installation,

User’s,

and

Maintenance

Guide