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

Страница: 69 / 388

Rescue Mode
51
Note
While partitioning your hard drive, keep in mind that the BIOS in some older systems
cannot access more than the first 1024 cylinders on a hard drive. If this is the case, leave
enough room for the
/boot
Linux partition on the first 1024 cylinders of your hard drive to
boot Linux. The other Linux partitions can be after cylinder 1024.
In
parted
, 1024 cylinders equals 528MB. For more information, refer to:
http://www.pcguide.com/ref/hdd/bios/sizeMB504-c.html
To add default options to the boot command, enter them into the
Kernel parameters
field. Any options
you enter are passed to the Linux kernel every time it boots.
Important — multipath devices
If you are installing Red Hat Enterprise Linux on a network device accessible through
multiple paths, ensure that GRUB is installed on the MBR of
/dev/mapper/mpath0
.
4.20.2. Rescue Mode
Rescue mode provides the ability to boot a small Red Hat Enterprise Linux environment entirely from
boot media or some other boot method instead of the system's hard drive. There may be times when
you are unable to get Red Hat Enterprise Linux running completely enough to access files on your
system's hard drive. Using rescue mode, you can access the files stored on your system's hard drive,
even if you cannot actually run Red Hat Enterprise Linux from that hard drive. If you need to use
rescue mode, try the following method:
• Using the CD-ROM to boot an x86, AMD64, or Intel
®
64 system, type
linux rescue
at the
installation boot prompt. Itanium users should type
elilo linux rescue
to enter rescue mode.
For additional information, refer to the
Red Hat Enterprise Linux Deployment Guide
.
4.20.3. Alternative Boot Loaders
If you do not wish to use a boot loader, you have several alternatives:
LOADLIN
You can load Linux from MS-DOS. Unfortunately, this requires a copy of the Linux kernel (and an
initial RAM disk, if you have a SCSI adapter) to be available on an MS-DOS partition. The only
way to accomplish this is to boot your Red Hat Enterprise Linux system using some other method
(for example, from a boot CD-ROM) and then copy the kernel to an MS-DOS partition. LOADLIN is
available from
ftp://metalab.unc.edu/pub/Linux/system/boot/dualboot/
and associated mirror sites.
SYSLINUX
SYSLINUX is an MS-DOS program very similar to LOADLIN. It is also available from