no maintenance jobs were running but there are 60-some-odd applications running on this server and some do overnight processing, batch loadings etc. . i don't have any direct visibility on the application processing side, but no one has reported any errors. it seems that everything just hung until the disk was increased.

now i've got a 180GB tempdb log file that i cannot shrink. it still reports 99% full and i'm going on 12 hours later. the log should truncate automatically but it seems to be hung at 99% full.