Installation guide

enables self-diagnosis on the CPU by default (called machine check exception). Early Com-

paq Pentium systems may need this option as they do not support processor error checking

correctly. A few other laptops, notably those using the Radeon IGP chipset, may also need

this option.

nonet

this command disables network hardware probing.

nopass

this command disables the passing of keyboard and mouse information to stage 2 of the in-

stallation program. It can be used to test keyboard and mouse configuration screens during

stage 2 of the installation program when performing a network installation.

nopcmcia

this command ignores any PCMCIA controllers in system.

noprobe

this command disables hardware detection and instead prompts the user for hardware in-

formation.

noshell

this command disables shell access on virtual console 2 during an installation.

nostorage

this command disables probing for SCSI and RAID storage hardware.

nousb

this command disables the loading of USB support during the installation. If the installation

program tends to hang early in the process, this command may be helpful.

nousbstorage

this command disables the loading of the usbstorage module in the installation program's

loader. It may help with device ordering on SCSI systems.

numa=off

Red Hat Enterprise Linux supports NUMA (non-uniform memory access) on the AMD64 ar-

chitecture. while all cpus can access all memory even without numa support, the numa sup-

port present in the updated kernel causes memory allocations to favor the cpu on which

they originate as much as possible, thereby minimizing inter-CPU memory traffic. This can

provide significant performance improvements in certain applications. to revert to the origin-

al non-NUMA behavior, specify this boot option.

reboot=b

this x86, AMD64, and Intel® EM64T boot command changes the way the kernel tries to re-

boot the machine. If a kernel hang is experienced while the system is shutting down, this

command may cause the system to reboot successfully.

rescue

this command runs rescue mode. Refer to Chapter 26, Basic System Recovery for more in-

formation about rescue mode.

resolution=

tells the installation program which video mode to run. it accepts any standard resolution,