Red Hat ENTERPRISE LINUX 5 - VIRTUAL SERVER ADMINISTRATION, Руководство по установке

Страница: 108 / 388

Chapter 8. Additional Boot Options for Intel
®
and AMD Systems
90
mem= xxx m
this command allows you to override the amount of memory the kernel detects for the machine.
This may be needed for some older systems where only 16 mb is detected and for some new
machines where the video card shares the video memory with the main memory. When executing
this command,
xxx
should be replaced with the amount of memory in megabytes.
mpath
enables multipath support.
Important — mandatory for installation on multipath devices
If you install Red Hat Enterprise Linux 5.5 on a network storage device accessible
through multiple paths, you must boot the installation process with this option. If you
do not specify this option at boot time, installation will fail, or the system will fail to boot
after installation completes.
nmi_watchdog=1
this command enables the built-in kernel deadlock detector. This command can be used to debug
hard kernel lockups. by executing periodic NMI (Non Maskable Interrupt) interrupts, the kernel can
monitor whether any CPU has locked up and print out debugging messages as needed.
noapic
this x86 boot command tells the kernel not to use the APIC chip. It may be helpful for some
motherboards with a bad APIC (such as the Abit BP6) or with a buggy bios. systems based on the
nvidia nforce3 chipset (such as the Asus SK8N) have been known to hang during IDE detection at
boot time, or display other interrupt-delivery issues.
nomce
this x86 boot command disables self-diagnosis checks performed on the CPU. the kernel enables
self-diagnosis on the CPU by default (called
machine check exception
). Early Compaq 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
installation 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 information.
noshell
this command disables shell access on virtual console 2 during an installation.
nostorage
this command disables probing for SCSI and RAID storage hardware.