The information in this document applies to AIX Versions 4.x. If you
need additional details about booting your system into maintenance mode
and starting a limited function maintenance shell, consult the product
documentation or contact your AIX support center.
Related documentation
The product documentation library is also available:
http://www.rs6000.ibm.com/resource/aix_resource/Pubs/index.html
To boot microchannel systems into Service mode, turn the key to the Maintenance position and press the yellow Reset button twice. You must boot from bootable media, such as an installation CD-ROM, installation tape or a bootable backup tape made via the mksysb command or the Sysback product of the correct level for this machine.
When booting a PowerPC into Service mode, cd0 or rmt0 must be before the hdisk in the bootlist. If not, change the bootlist at boot time. On some models, you can set the machine to use a default bootlist that includes both cd0 and rmt0. If a bootable CD or tape is in the CD-ROM or tape drive, the machine will boot from this device.
For most of the newer PCI-based models, selecting the default bootlist, with a bootable tape or CD loaded in the machine, causes the system to automatically boot from that device. Generally, the next menu on the screen asks the administrator to define the system console.
For all machines discussed here, if you are using a graphical terminal, you will use a function key such as F5. If you are using an ASCII terminal, use an equivalent number key such as 5. Use the numbers across the top of the keyboard, not the numbers on the numeric keypad. On ASCII terminals, the icons may not be displayed on the screen; the number can be pressed between the second and the third beeps, the second beep being a series of three clicks.
With bootable media as the same version and level as the system, boot the system. The bootable media can be any ONE of the following:
Follow the prompts to the Welcome to Base OS menu.
Access a Root Volume Group
The next screen prints a warning message and asks you to select 0 to continue. Select 0.
0 Continue
The next screen asks you to select the proper volume group. Select the proper volume group for your machine.
The console will display information about rootvg and a menu with two options. Choose option 1:
Access this volume group and start a shell
NOTE: You can also accomplish step 3 by booting into Service Mode from a Sysback Systape.
If you receive errors from the preceding options, do not continue with the rest of this procedure. First correct the problem. If you need assistance correcting the problem, contact one of the following:
passwd Changing password for "root" root's New password: Enter the new password again:
sync;sync;sync;reboot
[ Doc Ref: 90605208914742 Publish Date: Aug. 09, 2001]