Managing Systems and Workgroups: A Guide for HP-UX System Administrators

Administering a System: Booting and Shutdown
Booting Systems
Chapter 5500
The system will boot into single-user mode; watch for the confirmation
messages:
INIT: Overriding default level with level `s'
INIT: SINGLE USER MODE
Step 4. If you accessed the system console and service processor (management
processor) interfaces via a network, exit the console and service
processor interfaces if finished using them.
To exit the BCH environment type ^B (Control-B); this exits the
nPartition or system console and returns to the service processor Main
Menu. To exit the service processor, type X at the Main Menu.
Booting into LVM Maintenance Mode
To boot HP-UX in LVM Maintenance mode follow the procedure for
booting HP-UX into single-user mode (See “Booting into Single-User
Mode” on page 498):
ISL> hpux -lm boot
The boot/root logical volumes are the only logical volumes that are in a
known place when your LVM configuration data has been lost.
Maintenance mode is useful on such systems if a standard boot has failed
due to LVM configuration problems. You must resolve the LVM
configuration problem and then reboot.
CAUTION When you boot your system in maintenance mode, do not activate the
root volume group and do not change to multi-user mode (for example, by
specifying /sbin/init 2). If you do, you might corrupt the root file
system.
When you have repaired or restored the LVM configuration information,
reboot the system using the reboot command with the -n option. This
avoids overwriting your disk-based repairs with the old information still
stored in memory buffers.
/usr/sbin/reboot -n
You can find more information about LVM in Chapter 6, Administering a
System: Managing Disks and Files.