if you have file systems listed in fstab that won't mount, dont think you can get away by doing an -x mount_all_filesystems=false. You'll probably need to comment them out of fstab. ECC is sometimes bundled and kicks off a secondary swinstall that doesn't get any options passed to it.
also if you get the following message in swagent.log:
An unsupported version of Master Agent was found. Please uninstall from /usr/ecc to continue.
./install_native.sh: /usr/ecc/install_native.log: Cannot create the specified file.
but yet, there is no /usr/ecc..... it's finding a file in /var/emc/.eccrc and thinks there's a previous version installed - just delete that file and try again.