How to change read-only file system? for bootadm

Hi all, I had blackout problem with my server , and it looks like some boot files got corrupted, so had to enter to the console, but when I tried to execute bootadm command , I can't because its file system is on read mode,

Root password for system maintenance (control-d to bypass): <enter root password>

single-user privilege assigned to /dev/console.

Entering System Maintenance Mode

Feb 10 09:22:09 su: 'su root' succeeded for root on /dev/console

Sun Microsystems Inc. SunOS 5.10 Generic January 2005

# bootadm update-archive -v

read-only filesystem /

#

Do you know how change this, or which files or folder I have to change their privileges ?

[718 byte] By [xavier_kdnaa] at [2007-11-26 18:02:04]