Works fine after some modification

Seems pretty good, and the best out the ones that I have tested. However, the following requirement is confusing:

> If running on a 64-bit system, make sure you get
> the 64-bit 3ware utility tw_cli and name it
> tw_cli_64 as this is the name the plugin looks
> for on 64-bit systems.

It shouldn’t matter if the utility is named either tw_cli or tw_cli_64, it will function the same. I don’t understand why this script needs the file to be renamed to tw_cli_64, when ‘tw_cli’ works just fine. I pulled this part out of the script, as the required rename made our configuration management more complicated.