HP-UX System Administrator's Guide: Routine Management Tasks

INIT: SINGLE USER MODE
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” (page 68)):
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 HP-UX System Administrator’s Guide:
Logical Volume Management.
Speeding the Boot: SpeedyBoot
On many HP Integrity Servers and HP 9000 Systems, a firmware based feature called
SpeedyBoot allows you to bypass some of the boot-time system tests in order to boot
your system more quickly.
NOTE: HP recommends that all self tests be performed, but recognizes the need to
have your system available as quickly as possible.
If you are confident that your system hardware is functioning properly, you may choose
to skip certain boot-time system tests in favor of having your system boot up more
quickly.
The SpeedyBoot features of your system allow you to specify which tests to perform
(or skip) and whether to do this only for the next boot or for the next and all subsequent
70 Booting and Shutdown