How to update fstab (or other) in Single User (read only fs)

[DSA - JCR]

Hi all

FreeBSD 6.2 i386

I need to edit fstab to delete a geom mirror dev in order to boot my PC
and I can´t because when my computer boots find a problem in fstab
(because geom mirror device not ok) and then go to Single User mode.

In this mode I can´t edit fstab, because there is not editor working (I´ve
tried ee, vi.. all says "fs is readonly")

How can I do this? I think there must be a way to do it, isn't it?

thanks in advance

Juan Coruña
Desarrollo de Software Atlantico