IBM 7015-R50, Installation And Service Manual

Page: 83 / 300

Using SystemGuard
2-49
Rebooting to Single-User and then to Multi-User
This allows the remote support personnel connected to the system via a modem to the S2
port to shut down and reboot the system in Diagnostics mode for hardware diagnostics
purposes. After running diagnostics, the remote personnel can reboot the system in AIX
Multi-User without having a need to physically touch the machine.
1. While AIX is running, type the command:
shutdown
and press Enter, to shut down the system.
2. Once the system is shutdown press Enter, you see the Stand-By mode prompt (>).
Remember, at this point the Electronic switch is in Service mode. Leave it in Service
mode.
3. At the Stand-By prompt, type the power on keyword for S2 that we had set earlier
(
power
in our example).
4. The system reboots in Diagnostics. From here, diagnostic tasks can be run.
5. Once completed, activate single-user boot from the Diagnostic’s main menu.
6. You are prompted for a password; enter the root password.
7. Type the following command to reboot in AIX Multi-User:
init 2
8. After about ten minutes, the system should have rebooted and loaded AIX.
9. If S2 was configured as a tty from AIX as well, an AIX login screen appears on this
remote Service Console.
How to Boot from a SCSI Device
The SMP server can be booted in Service mode from a desired SCSI device, either from the
MAINTENANCE MENU or through the bootlist.
Booting from an SCSI Device through the Maintenance Menu
When the system is booted with the system key in Service position, it either boots in the
MAINTENANCE MENU, in Diagnostics or from a SCSI device, depending upon the various
flag settings.
Note: To be able to boot from an SCSI device other than the boot disk such as a tape
drive, the flag BOOT MULTI-USER AIX IN SERVICE must be disabled. This can be
set through the MAINTENANCE MENU. To check or change this flag, do the
following:
1. Enter the MAINTENANCE MENU; refer to the MAINTENANCE MENU section on page
2-21 for details.
2. From the MAINTENANCE MENU, enter
8
to select the SET PARAMETERS menu.