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===GRUB===
:''Source: [http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/ref-guide/s1-grub-whatis.html Redhat GRUB description].''
# The first stage loader is read by the [[BIOS]] from the [[MBR]] (master boot record).
# The first stage loads the rest of the boot loader (second stage). If the second stage is on a large drive, sometimes an intermediate 1.5 stage is loaded, which contains extra code to allow [[cylinder head]]s above 1024, or [[LBA]] type drives, to be read. The 1.5 boot loader is stored (if needed) in the MBR or the boot partition.
# The second stage boot loader executes, and displays the GRUB startup menu. It also allows choice of operating environment, and examination of system parameters.
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