[gentoo-user] VFS root device and kernek panic

[jangar]

hi, i have problem with Gentoo Linux 2005.1 AMD64 installation.
CPU: Athlon 64 2800+
HD SATA Maxtor 80GB
Ati Radeon 9200
etc...

after make partition, LVM2 and compiling kernel and config grub my kernel give me follow message:
VFS Cannot Open root device "sda3" or unknow-block(0,0)
...
Kernel panic ...

i have set grub to follow synax
###############################################
Title Gentoo/Linux
root (hd0,0)
kernel /kernel-2.6.12-gentoo-r10 root=/dev/sda3
###############################################

and my /etc/fstab is configured as follow
#######################################################################
/dev/sda1               /boot       ext2    defaults,noatime        1 2
/dev/sda2               none        swap    sw                      0 0
/dev/sda3               /           xfs     noatime                 0 1
/dev/vg/usr             /usr        xfs     noatime                 0 0
/dev/vg/home            /home       xfs     noatime                 0 0
/dev/vg/opt             /opt        xfs     noatime                 0 0
/dev/vg/var             /var        xfs     noatime                 0 0
/dev/vg/tmp             /tmp        xfs     noatime                 0 0
none                    /proc       proc    defaults                0 0
none                    /dev/shm    tmpfs   nodev,nosuid,noexec     0 0
/dev/cdroms/cdrom0      /mnt/cdrom  auto    noauto,user             0 0
#######################################################################

what is appened?

thanks