Lenovo 6445 用户手册

switches

 

from

 

the

 

active

 

pair

 

to

 

the

 

mirroring

 

pair.

 

Memory

 

mirroring

 

reduces

 

the

 

amount

 

of

 

available

 

memory.

 

Enable

 

memory

 

mirroring

 

through

 

the

 

Configuration/Setup

 

Utility

 

program.

 

See

 

the

 

section

 

about

 

using

 

the

 

Configuration/Setup

 

Utility

 

program

 

in

 

the

 

 

 

on

 

the

 

 

 

DVD

 

for

 

details

 

about

 

enabling

 

memory

 

mirroring.

 

When

 

you

 

use

 

memory

 

mirroring,

 

you

 

must

 

install

 

two

 

pairs

 

of

 

DIMMs

 

at

 

a

 

time.

 

The

 

four

 

DIMMs

 

in

 

each

 

group

 

must

 

be

 

identical.

 

See

 

for

 

the

 

DIMM

 

connectors

 

that

 

are

 

in

 

each

 

group.

 

 

 

 

 

 

 

 

 

 

 

 

1

 

1,

 

4,

 

7,

 

and

 

10

 

2

 

2,

 

5,

 

8,

 

and

 

11

 

3

 

3,

 

6,

 

9,

 

and

 

12

  

 

 

 

 

 

 

 

 

 

 

 

 

1

 

1,

 

4

 

7,

 

10

 

2

 

2,

 

5

 

8,

 

11

 

3

 

3,

 

6

 

9,

 

12

  

 

 

The

 

server

 

supports

 

online-spare

 

memory.

 

This

 

feature

 

disables

 

the

 

failed

 

memory

 

from

 

the

 

system

 

configuration

 

and

 

activates

 

an

 

online-spare

 

pair

 

of

 

DIMMs

 

to

 

replace

 

the

 

failed

 

active

 

DIMM

 

pair.

 

Online-spare

 

memory

 

reduces

 

the

 

amount

 

of

 

available

 

memory.

 

Before

 

you

 

can

 

enable

 

this

 

feature,

 

you

 

must

 

install

 

up

 

to

 

two

 

additional

 

pairs

 

of

 

DIMMs.

 

The

 

online-spare

 

DIMM

 

pairs

 

must

 

be

 

the

 

same

 

speed,

 

type,

 

and

 

the

 

same

 

size

 

as,

 

or

 

larger

 

than,

 

the

 

largest

 

active

 

DIMM

 

pairs.

 

Enable

 

online-spare

 

memory

 

through

 

the

 

Configuration/Setup

 

Utility

 

program.

 

The

 

BIOS

 

code

 

assigns

 

the

 

online-spare

 

DIMM

 

pairs

 

according

 

to

 

your

 

DIMM

 

configuration.

 

Online-sparing

 

is

 

enabled

 

on

 

a

 

memory

 

branch

 

basis;

 

the

 

BIOS

 

code

 

does

 

not

 

enable

 

online-sparing

 

on

 

a

 

branch

 

that

 

cannot

 

support

 

online-sparing.

 

See

 

the

 

illustration

 

on

 

page

 

for

 

the

 

memory

 

branch

 

structure.

 

DIMM

 

ranks

 

are

 

online-spared

 

if

 

the

 

DIMMs

 

are

 

installed

 

according

 

to

 

the

 

rules

 

in

 

or

 

 

POST

 

gives

 

a

 

warning

 

message

 

when

 

online-sparing

 

cannot

 

be

 

enabled

 

on

 

both

 

branches.

 

However,

 

no

 

warning

 

message

 

is

 

given

 

when

 

online-sparing

 

is

 

enabled

 

on

 

one

 

branch

 

and

 

disabled

 

on

 

the

 

other.

 

Online-spare

 

configurations

 

are

 

supported

 

for

 

each

 

branch.

 

See

 

and

 

for

 

the

 

online-spare

 

DIMM

 

connector

 

assignments.

 

 

shows

 

the

 

default

 

DIMM

 

online-spare

 

scheme.

 

If

 

the

 

BIOS

 

code

 

level

 

is

 

version

 

1.04

 

or

 

later,

 

you

 

can

 

install

 

the

 

DIMMs

 

according

 

to

 

the

 

scheme

 

shown

 

in

 

instead.

 

 

 

ThinkServer

 

RD120

 

Types

 

6444,

 

6445,

 

6446,

 

and

 

6447:

 

Installation

 

Guide