Mike Laspina just released a new version of his VMFS metadata backup script. William Lam, the creator of the health check report script I wrote about, helped Mike out to add a new feature “rolling backup” with folder augmented organization based on the host name, store alias, date label and the rolling instance number. This new version saves 10 versions of your metadata instead of just one and gives them a more appropriate name.
You can find the new version of the VMFS metadata backup script here.
those script does not work with ESXi. a combination with VMware KB article 1020645 could work for ESXi as well.