HELP: system hangs at boot

[Lars Jensen <jensen@scs.unr.edu>]

Whenever I boot up my system I get the following error message when the 
file system is being mounted:

ERROR: "cannot fsck root fs because fs is not mounted read-only"

and a little later the system hangs.

If I boot my system with the rw option like this:
boot: linux rw
the boot process appears normal, and the system doesn't hang, but I 
still get the above error. 

What suddenly caused this, I'm not sure, but does anyone know how to fix
it?

Thanks,
Lars.

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Lars Jensen, Truckee Meadows Community College, Reno NV 89512-3999. 
Tel: 775.673.7113 E-mail: jensen@unr.nevada.edu