Installation guide

The Force LBA32 (not normally required) option allows you to exceed the 1024 cylinder
limit for the /boot/ partition. If you have a system which supports the LBA32 extension for booting
operating systems above the 1024 cylinder limit, and you want to place your /boot/ partition above
cylinder 1024, you should select this option.
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, see the Red Hat Enterprise Linux Deployment Guide.
4 .20.3. Alt ernat ive Boot Loaders
If you do not wish to use a boot loader, you have several alternatives:
LO ADLIN
You can load Linux from MS-D OS. 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/
⁠Chapt er 4 . Inst alling on Int el® and AMD Syst ems
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