HP-UX HB v13.00 Ch-04 - System Recovery

HP-UX Handbook – Rev 13.00 Page 6 (of 54)
Chapter 04 System Recovery
October 29, 2013
 The address of the root filesystem on the disk (i.e., what file system you will be
checking/repairing using fsck).
 The address of the bootlif path of that disk.
 Whether you have an LVM or non-LVM system.
The more you know about the system disk and its partitioning scheme, before you encounter
major damage or corruption, the easier it will be for you to recover. The procedures which follow
assume that both fsck and mount can be run successfully on the system disk; otherwise, the
following procedures are not applicable. The original documentation can be found in the Ignite-
UX Administration Guide, HP Part Number: B2355-90772, section System Recovery, subsection
Expert Recovery using the Core Media. The manual is downloadable from http://docs.hp.com.
There are possible expert recovery situations, each of which has its associated automated
recovery procedure:
 If, after a system problem, you can't get the system to the ISL> prompt from the system
disk, you will want to rebuild the bootlif on the system disk.
 If you can get the system to the ISL> prompt, but cannot boot vmunix, then depending on
the error(s) this might be any of the following problems such as missing vmunix,
corrupted vmunix, corrupted LVM BDRA configuration, incorrect syntax in the LIF’s
AUTOEXEC file, or possible system disk corruption, etc.
 If you believe your kernel is corrupted, you will want to replace only the kernel on the
boot filesystem.
Automated Procedure 1: Rebuilding bootlif and Installing Critical Files
1. Boot the system to the Recovery Main Menu (see Co-Procedure).
2. From the main menu select Recover an unbootable HP-UX system. The following menu
is presented:
HP-UX Recovery MENU
Select one of the following:
a. Rebuild the bootlif (ISL, HPUX, and the AUTO file) and install
all files required to boot and recover HP-UX on the
root file system.
b. Do not rebuild the bootlif, but install files required to boot
and recover HP-UX on the root file system.
c. Rebuild only the bootlif.
d. Replace only the kernel on the root file system.
m. Return to 'HP-UX Recovery Media Main Menu'.
x. Exit to the shell.
Use this menu to select the level of recovery desired.
Selection: