Nick, ProcessMonitor or Filemon from sysinternals should tell you what's accessing the disk. Tony "Nick Smith" <nick@xxxxxxxxxxxxxxxxxx> Sent by: thin-bounce@xxxxxxxxxxxxx 04/13/2007 05:33 AM Please respond to thin@xxxxxxxxxxxxx To <thin@xxxxxxxxxxxxx> cc Subject [THIN] OT: Tracking disk thrash We have an SBS at a client that is getting frequent irregular 100% disk usage for long enough to severely impair users. Are there any utilities that could help me pin down what process and/or users are causing this? Sorry for waaaay off-topic, but client getting *very* antsy and you are knowledgeable types. Nick This e-mail is confidential and is intended only for the attention of the addressee. If you are not the intended recipient, this e-mail should not be disclosed to any other person. Please notify the sender immediately and delete this e-mail from your computer system. Although this e-mail has been checked for viruses and other defects, no responsibility can be accepted for any loss or damage arising from its receipt or use.