Problem HELP PLEASE!!

[vanclan117]

i have been installing gentoo for a computers class and i have done a bunch of stuff off a site the instructor gave the class but when i go to start up gentoo it comes up with this on the screen everytime:

[ 1.710121] md: autorun ...
[ 1.710279] md: ... autorun DONE.
[ 1.776920] ETX3-fs (sda3): error: couldn't mount because of unsupported opti
onal features (240)
[ 1.802218] List of all partitions:
[ 1.802413] 0800 156290904 sda driver : sd
[ 1.802607] 0801 128488 sda1
[ 1.802799] 0802 4000185 sda2
[ 1.802992] 0803 152159647 sda3
[ 1.803197] 0b00 1048575 sr0 driver: sr
[ 1.803390] No filesystem could mount root, tried: ext3 vfat msdos iso9660
[ 1.803742] Kernel panic - not syncing : VFS: Unable to mount root fs on unkno
wn-block(8,3)
[ 1.803975] Pid: 1, comm: swapper Not tainted 2.6.34-gentoo-r6 #1
[ 1.804138] Call Trace:
[ 1.804297] [<ffffffff8152037f>] panic+0x73/0xe8
[ 1.804455] [<ffffffff81af81af>] mount_block_root+0x1ce/0x1e5
[ 1.804613] [<ffffffff81002933>] ? system_call_after_swapgs+0x3/0x65
[ 1.804769] [<ffffffff81af8231>] mount_root+0x6b/0x8b
[ 1.804924] [<ffffffff81af83c1>] prepare_namespace+0x170/0x19d
[ 1.805089] [<ffffffff81af771a>] kernel_init+0x1d4/0x1e4
[ 1.805245] [<ffffffff81003754>] kernel_thread_helper+0x4/0x10
[ 1.805401] [<ffffffff81af7546>] ? kernel_init+0x0/0x1e4
[ 1.805556] [>ffffffff81003750>] ? kernel_thread_helper+0x0/0x10
_


can someone help me quick? i need this by the end of this week..

[Segfault]

VFS: Unable to mount root fs on unknown-block(8,3)

This error means kernel is trying to access the third partition of first hard drive and mount it as root filesystem.
Since this is not happening ...

0. make sure third partition of first drive contains your root filesystem;

1. make sure support for root filesystem is included in kernel (not as module).
These are the filesystems supported by your kernel: ext3 ext2 cramfs vfat msdos iso9660 romfs
However, earlier there is an error

ETX3-fs (sda3): error: couldn't mount because of unsupported optional features (240)

which implies you may be using EXT4.