Linux boot
image=/boot/vmlinuz-2.2.15
This is the actual virtual memory compressed kernel of Linux
initrd=/boot/initd-2.2.15.img
This reveals the location of the second stage(RAM) load.
During the installation ,the RAM disk file system is started in Read-only mode. After the second stage is finished with a few tests, the RAM disk is unloaded from memory and the real root partition is mounted form the file system in Read/Write mode.
MBR: master boot recorder
# mkbootdisk /dev/fd0 `uname -r`
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