file system with errors

[Steve Buehler]

RedHat 4.x system.
I am trying to boot a linux system that has 4 HD's.  3 of them are on 
in a raid 5 configuration and the other one is the boot drive with 
the OS on it.  When I boot the system, I get the message
/var/spool/mail contains a file system with errors, check forced.
The file system in question is the raid and is 500GB in size.  I let 
it run for several days at boot up but it never came out of the file 
system check and the hard drive lights stop blinking after only about 
an hour, give or take.  How can I tell it at boot time to NOT do a 
file system check like this so that I can get into the system and 
either run it manually or format the partition again.
Suggestions?

Thanks
Steve