Ibm RS/6000 Manual do Utilizador descarregar pdf (Página 178)

8.3.3 Maintenance Mode

Diagnostics can run from Single-User mode (Maintenance mode - although this is

different from booting into Maintenance mode from a CD-ROM or a tape). You can

shut your system down into a Single-User mode which will allow testing many of

your system resources which would normally be in use while AIX is running. All the

system resources, except the SCSI adapters and disks used for paging, memory

and processors, can be tested. Error Log Analysis is available in this mode. Other

users will not be allowed to log into the system while the system is in Single-User

mode.

Logged on as root, you can enter diagnostics in Single-User (Maintenance) mode

by performing the following:

1. Stop all applications and log all users off the system.

2. Enter the shutdown -m command.

3. When a message indicates the system is in Maintenance mode, enter the diag

command.

4. When the Diagnostic Operating Instructions area is displayed, follow the

instructions to check the desired resources.

After you have completed testing the system, you can shut down and reboot the

system.

8.4 Using NIM to Run Online Diagnostics over the Network

Hardware diagnostics can be performed on all NIM Clients by using a diagnostic

boot image from a NIM Master rather than booting from a diagnostic CD-ROM or

from a local Online Diagnostics package. This is useful on stand-alone Clients,

which don't have the

bos.diag

package installed on the local disk. Before the Client

can be booted in Diagnostic mode, the following conditions must be met:

1. The Client must have a spot NIM resource object allocated to it (see 9.1.2,

“NIM Objects” on page 158).

2. The diag NIM operation must be performed on the specific Client. This

operation prepares the resources a Client requires for a network diagnostics

boot.

8.4.1.1 Creating a NIM Environment for Diagnostics

The procedure to create a NIM diagnostic environment is the same as described in

Chapter 9, “Network Installation Management (NIM) Support” on page 157 First,

you have to define the lpp_source resource object (see 9.2.6.1, “Defining the

lpp_source Resource Object” on page 169); then, the spot resource must be

defined (see 9.2.6.2, “Defining the Shared Product Object Tree (SPOT) Resource

Object” on page 170).

Unlike using NIM to install a Client machine over the network, where two NIM

resources,

lpp_source

and

spot

, need to be allocated to the Client (see 9.2.7,

“Allocating Resources for the Stand-Alone Installation” on page 172), in the case of

diagnostics, only the

spot

resource has to be allocated.

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