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Xserve RAID Basics -

Features

Quick-Swap Modules

Several modules can be easily replaced in Xserve RAID without removing the system from

its rack. Most of these modules are both redundant and hot-swappable. The following table

is a quick reference to these modules:

Identiﬁer Light/Button

The identiﬁer light on the Xserve RAID front panel turns on when internal sensors or a

systems administrator detects a problem with the unit. The light can also be turned on by

pressing the identiﬁer button. This indicator will help you locate which Xserve RAID in a

rack needs servicing.

Note:

A duplicate identiﬁer light/button is on the unit’s back panel.

Hot-Pluggable ATA Drives

Xserve includes fourteen hard drive bays at the front of the server, each of which supports

a hot-pluggable ATA/100 drive module available only from Apple. You can replace or install

hard drives while the server is running; you do not need to shut down or open the server

ﬁrst. A status light on the front of each drive indicates when it is safe to remove the drive

without losing data. For more information, see “Hard Drive” in the Take Apart chapter.

RAID Controller Modules

Xserve RAID includes two controller modules, each with a minimum of 128 MB RAM. The

top controller manages the seven drive modules on the system’s left side (viewed from the

front of the system); the bottom controller manages the seven drive modules on the right.

Each controller module consists of the controller card, processor, and memory.

Table 1: Quick-Swap Modules

Module Hot-swappable? Redundant?

ATA Drives Yes Depends on RAID conﬁg

Power Supplies Yes Yes

Cooling modules Yes Yes

Battery Modules Yes Yes

Controller Modules No: System must be shut

down ﬁrst

No: Upper controller

manages left seven drives;

lower controller manages

right seven drives

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Apple Xserve Guia de preparacion Pagina 5