C H A P T E R 1 - Preparing for FRU Installation and Replacement

C H A P T E R 1

Preparing for FRU Installation and Replacement

This chapter describes the steps you need to take before you install, remove, or replace a field-replaceable unit (FRU) in your Netra CT server. This chapter is divided into the following sections:

Section 1.1, Tools Required

Section 1.2, Attaching the Antistatic Wrist Strap

Section 1.3, FRU Categories

Section 1.4, Device Names

1.1 Tools Required

You need the following tools to install, remove, or replace components in a Netra CT server:

No. 1 Phillips screwdriver

No. 2 Phillips screwdriver

1.2 Attaching the Antistatic Wrist Strap

Most field-replaceable units have sensitive electronic components that require antistatic precautions.

1. Get the antistatic wrist strap and electrostatic discharge mat from the shipping kit.

2. Place the electrostatic discharge mat close to the system.

3. Unwrap the first two folds of the wrist strap and wrap the adhesive side firmly against your wrist.

4. Peel the liner from the copper foil at the opposite end of the wrist strap, and attach the copper end of the strap to a bare metal area on the Netra CT server or on the chassis, as shown in FIGURE 1-1.

FIGURE 1-1 Attaching the Antistatic Wrist Strap

1.3 FRU Categories

In general, the FRUs in a Netra CT server can be divided into two categories:

Hot-installable/replaceable (referred to hereafter as hot-swappable), meaning that you can install or remove and replace the FRU while the server is running, without interrupting the operation of the server. This category of FRU sometimes requires that you enter hot-swap software commands before and after an installation or a removal/replacement to incorporate the new FRU in the system correctly. For information on hot-swap commands, see Chapter 5.

Non-hot-swappable, or cold-swappable, meaning that you must halt (and, in some cases, also power off) the server before installing or removing and replacing a FRU. Note that you must halt power only to the server where you would be removing and replacing the FRUs; any other servers installed in the same chassis can remain running.

Redundant power supplies and hard drives in a Netra CT 810 server are a variation of the hot-swappable category. You can replace a single power supply in a redundant configuration while the server is running, without having to enter any software commands, or a single hard drive after you have unmounted the drive or disengaged it if you are running a disk management software package.

1.3.1 Hot-Swappable FRUs

The FRUs listed below are hot-swappable:

I/O boards

Satellite CPU boards and satellite RTMs

Alarm cards for both the Netra CT 810 server and the Netra CT 410 server ^[1]

Alarm rear transition modules1.

Host CPU board ^[2]

Host CPU rear transition module (rear-access model only)2.

Either of the two hard drives in a Netra CT 810 server

DVD or DAT (digital audio tape) drives occupying the removable media module

Fan trays

System status panels

System controller boards ^[3]

Either of the two power supply units in a Netra CT 810 server

Power supply unit air filters

Main air filters

The instructions for removing and replacing these hot-swappable FRUs are covered in P A R T 3 - Replacing Hot-Swappable FRUs.

1.3.2 Cold-Swappable FRUs

The FRUs listed below are cold-swappable:

Single power supply in a Netra CT 410 server

Single or lone remaining power supply in a Netra CT 810 server

Single hard drive in a Netra CT 410 server

Single or lone remaining hard drive in a Netra CT 810 server

Power distribution units

Powered-off or empty servers

The instructions for removing and replacing these cold-swappable FRUs are covered in P A R T 4 - Replacing Cold-Swappable FRUs.

1.4 Device Names

The following sections provide information about device names for I/O slots and hard drives.

1.4.1 Device Names for I/O Board Slots in the Netra CT Servers

TABLE 1-1 gives the device names for the I/O board slots in the Netra CT 810 server, and TABLE 1-2 gives the device names for the I/O board slots in the Netra CT 410 server.

TABLE 1-1 Device Names for I/O Board Slots in the Netra CT 810 Server
Slot Number	Device Name
2	/devices/pci@1f,0/pci@1/pci@1/pci@f
3	/devices/pci@1f,0/pci@1/pci@1/pci@e
4	/devices/pci@1f,0/pci@1/pci@1/pci@d
5	/devices/pci@1f,0/pci@1/pci@1/pci@c
6	/devices/pci@1f,0/pci@1/pci@1/pci@b
7	/devices/pci@1f,0/pci@1/pci@1/pci@a
8	/devices/pci@1f,0/pci@1/pci@1/pci@8

TABLE 1-2 Device Names for I/O Board Slots in the Netra CT 410 Server
Slot Number	Device Name
1	/devices/pci@1f,0/pci@1/pci@1/pci@8
2	/devices/pci@1f,0/pci@1/pci@1/pci@f
4	/devices/pci@1f,0/pci@1/pci@1/pci@e
5	/devices/pci@1f,0/pci@1/pci@1/pci@d

Note - For Netra CP2500 boards, pcia and pcib probe lists do not apply.

1.4.2 Device Names for hard drives

Following are the device names for the hard drives installed in the Netra CT servers:

Netra CT 810 server:

HDD 0--c0t0d0

HDD 1--c1t1d0

Netra CT 410 server:

HDD 0--c0t0d0

^{1 (Footnote) The alarm card and alarm rear transition module are hot-swappable only if the host CPU board and system controller board are also installed in the Netra CT server.}

^{2 (Footnote) The host CPU board and the host CPU rear transition modules are hot-swappable only if the alarm card and system controller board are also installed in the Netra CT server.}

^{3 (Footnote) The system controller board is hot-swappable only if the alarm card and host CPU board are installed in the Netra CT server.}