After disabling cluster in 7 mode (cf disable) and “halt”ing both nodes, verify there are at the LOADER prompt. At the loader prompt continue:
LOADER-A> set-defaults
LOADER-A> setenv bootarg.init.boot_clustered true
LOADER-A> setenv AUTOBOOT false
LOADER-A> boot_ontap
If the second line is done exactly then it will not work as expected. If it is booting “7-mode” then either there was a typo or the line was skipped all together.
there are a lot of little steps to this process. If you can’t get by the second step you may want to reconsider the process