At my current position, one of the first things I do when things start acting up is to check available hard drive space. We have a lot of processes that perform very large aggregations, and (with fairly frequent code-pushes) it's not unknown for a t-log file, or sometimes tempdb, to suddenly bloat up to fill all available space. These days I always check the alpha-characters first; I wasted 10 minutes or so of Production downtime because I only saw "23", when what it actually said was "23MB". :pinch:

Mileage will of course vary depending on your code, environment, and so forth.

Philip