/sda1/ isn't a directory in the Linux Filesystem Hierarchy Standard (FHS), so you can do this, and create the directory in
/sda1/htdocs, but I for one, would think you're a twat for doing so.
Everyone else uses
/srv/. For a damn good reason. It's where people expect to find things. Breaking from the FHS is just asking for trouble.
A better bet would be
Options Indexes FollowSymLinks MultiViews
Allow from All
Which is pretty much the apache default for 000-default.