IBM 150 Manual De Usuario

Diagnostics and System Management Services 

Error Log Analysis can be performed in Concurrent mode by selecting the 
Problem Determination option on the Diagnostic Routine Selection menu.

To run On-line Diagnostics in Concurrent mode, just enter the following 
command as root:

diag

After a period of time (up to three minutes), you will be presented with the 
diagnostics initial screen.

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 down your system into a single-user mode, which will 
allow testing of many of your system resources that 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 

cd /

 to change into the root directory.

3. Enter the 

shutdown -m

 command.

4. When you see a screen similar to this one:

the system prompts you for the root password (if set).

5. Enter the root password.

6. At the command prompt (#), enter the 

diag

 command.

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

instructions to check the desired resources.

After you have completed testing the system, press F3 to return to the 
diagnostic operating instructions. Press F3 again to return to the AIX 
operating system prompt. Press the Ctrl-D key sequence to log off from root.

Init: Single User Mode
Password: