Unable to change tty /dev/tty1

Hi All, I am using Debian Sarge 2.4.27. My root file system is read only. Now after login I am getting a error like this: Unable to change tty /dev/tty1 : Read Only file System. Though it successfully login. Can you please suggest me how to get relief from this message. Is it very harmful to system

Unable to change tty /dev/tty1

Hi, Thank you very much Joe and Florian for your response. Actually this is part of a Embedded system. So my total root file system will be in flash which is read only. So I can not make root read write. I have another RW root also. but there is no problem like Unable to change tty /dev/tty1 : Rea