Originally Posted by Jamie

My website’s bandwidth is over 200 GB per month and diskspace usage is 2700 MB

What determines one going from a semi dedicated to dedicated server?

My web host shut my site down without notice a few month ago because they said I was getting too much traffic and suggested I change to a semi dedicated server which I did and now they closed by site again, without notice, saying I am “running high IO constantly” whatever that is. My traffic is about the same over the last view months. Is this normal behavior one should expect from a web host shutting your site down without any notice and telling you to upgrade?
How much should one pay a month for a dedicated server? Any suggestions where I should go?