IBM Partner Pavilion DS4100 User Manual

Note:

Always

use

the

DS4000

Storage

Manager

client

to

check

your

cache

memory

settings

before

assuming

a

hardware

failure.

shows

the

location

of

the

Cache

active

LED

on

the

front

of

the

RAID

controller.

RAID

controller

cache

battery

Each

RAID

controller

contains

a

sealed,

rechargeable

4-volt

lead-acid

battery.

This

battery

provides

cache

backup

for

up

to

three

days

in

the

event

of

a

power

loss.

The

service

life

of

the

battery

is

three

years,

after

which

time

the

battery

must

be

replaced.

See

the

DS4000

Storage

Manager

client

for

information

on

how

to

view

and

set

the

battery

expiration

date.

Each

RAID

controller

has

a

green

Battery

LED

on

the

back

that

indicates

the

battery

status,

as

follows:

v

The

LED

is

on

and

remains

steady

when

the

battery

is

fully

charged.

v

The

LED

flashes

when

the

battery

is

charging

or

performing

a

self-test.

v

The

LED

is

off

if

the

battery

or

the

battery

charger

has

failed.

The

battery

performs

a

self-test

at

startup

and

every

25

hours

thereafter

(during

which

time

the

Battery

LED

flashes).

If

necessary,

the

battery

begins

recharging

at

that

time.

If

the

battery

fails

the

self-test,

the

Battery

LED

turns

off,

indicating

a

battery

fault.

Data

caching

starts

after

the

battery

completes

the

startup

tests.

shows

the

location

of

the

Battery

LED

on

the

front

of

the

RAID

controller.

Cache

active

LED

f10ug036

Figure

60.

Cache

active

LED

76

IBM

TotalStorage

DS4100

Storage

Server:

Installation,

User’s,

and

Maintenance

Guide