The disk space on our Exchange server has plummeted to ~100KB this morning, which has unmounted our Exchange store. The contents of the /Exchsrvr/MDBDATA folder come to a total of 59GB out of a total amount of space on the C drive of ~137GB.
I found some unnecessary files on the C drive (Windows XP SP1, Windows 2000 SP4 installation files) and moved them to another server, ostensibly freeing up well over 600MB. I then ran Windows' Disk Defragmenter.
Defrag shows 90% fragmentation - the whole map was red. This is obviously a bad thing, but worse was the fact that the amount of free disk space shown was dropping like a stone, around 4-5MB per second. It fell from around 400MB to eventually level out around 11MB, and then dropped to a few hundred KB and the store dismounted.
I am the only moderately tech-savvy individual in our office (primarily made up of designers and video editors). I am a competent programmer but *not* an Exchange engineer (very little experience with Server 2003, in fact).
Any help or pointers would be much appreciated; Google Search isn't much help as I'm coming at this from a symptoms-only point of view, I need to know what's actually causing this.
I've spotted a few Google entries which mention Veritas issues (we are running Veritas on a separate server, but it does back up the Exchange store) but they tend to point towards purging VSS snapshots, and there doesn't seem to be any on our Exchange server.