Redirect 301 of the old url

The below simple format (put in .htaccess) works but I do not know if there are any hidden disadvantages:

Redirect permanent /olddirectory www.domain.com/newdirectory

Sorry the last line in each case should have been as follows but still did not work:

RewriteRule ^business/$ www.abc.com/directory/ [R=301,L]

RewriteRule ^business/?(.*)$ www.abc.com/directory/$1 [R=301,L]

Put this code above the SEF Advance block, i.e. right after the lines 'RewriteEngine On' and 'RewriteBase /'.