Ping response but can't get to server. Just need some advice

All last week I had a downed disk (virtual tape) drive. So my backups wouldn't run. Last saturday (this current one) I finally got it fixed and watched the staging process begin (YEAY!!). Ok so I come in today and I try to access the server but nothing. If I do I ping I get a response; it's low but it's a response. The server itself appears to be busy and when I try remote desktop it times out. Should I be concerned? I can't get into networker to check the status of anything. Is it possible the backups are running so heavy (I know after a week of nothing it will want to do full backups of all my servers) that I can't get in? Should I just let it run? Thanks