kernel panic

[Doll, Margaret Ann]

I upgraded a working system to 2.6

I then brought down the system to level 1 to upgrade the NVIDIA drivers
with the new kernel.
The NVIDIA drivers installed along with the extra GLX drivers.  The
uninstall hung.

Now I cannot boot the system.

RAMDISK:  incomplete write (9338 !=32768)
write error
Kernel panic - not syncing:  VFS:  Unable to mount root fs on
unknown-block(0,0)
Pid: 1, comm:  swapper Not tainted 2.6.32-358.11.1.el6.x86_64 #1
Call Trace:

[<ffffffff8150d4f8>] ? panic+0xa7/0x16f
                81c283f2>] ? mount_block_root+0x1ea/0x29e
                81002930>] ? bstat+0x2a0/0x970
                81c284fc>] ? mount_root+0x56/0x5a
                81c28670>] ? prepare_namespace+0x170/0x1a0
                81                 kernel_init
                                    child_rip
                                    kernel_init
                                   child_rip

What should I do next?