http://www.gentoo.org/doc/en/handboo...intable&full=1
These are just excepts.. but please go through it thoroughly.....
4.c. Using fdisk to Partition your Disk
The following parts explain how to create the example partition layout described previously, namely:
Partition Description
/dev/hda1 Boot partition
/dev/hda2 Swap partition
/dev/hda3 Root partition
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4.e. Mounting
Now that your partitions are initialized and are housing a filesystem, it is time to mount those partitions. Use the mount command. Don't forget to create the necessary mount directories for every partition you created. As an example we mount the root and boot partition:
Code Listing 15: Mounting partitions
# mount /dev/hda3 /mnt/gentoo
# mkdir /mnt/gentoo/boot
# mount /dev/hda1 /mnt/gentoo/boot
In the above case the partitions were created on hda .. and the root partition is /dev/hda3 [So ur ---> /mnt/gentoo is in the root partition [/dev/hda3] of ur hard-disk ]