Best practice to change esx syslog location

Hello,

I'am two esx version 5.1. my syslog.global.logdir is on san that i want to replace. My new san is online.

I want to move my log on one datastore in the new san

What the best way ?

just copy log to the new datastore and change syslog.global.logdir value with the new path ?

after change syslog.global.logdir value muste i reboot my host?

thanks for your help

Olivier