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Disk space on Exchange server drops to near-zero, no matter what is deleted.

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Last Modified: 2013-12-01
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.

Please help!
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