Operating System Hard drive goes crazy after resume (1 Viewer)

[dir]

Whenever I resume my Vista htpc pc from a suspended state, the hard drive goes crazy (ie. it's solid on) for about 5 to 10 minutes or longer. I've checked Task Manager and Process Explorer, but there's no processes using any CPU to speak of.

The only process that seems to be active, and JUST BARELY, is my anti-virus software. But it's not doing anything; it's not doing an active scan, it's not doing any file IO.

I've only seen this on my Vista PCs. I have two Vista PCs; they are entirely dissimilar in every way (one uses RAID; the other has a single hard drive. One is an Intel CPU, the other AMD. The motherboards are 4 years apart in age.). The htpc PC has 2GB of memory.

Within Task manager, I have enabled I/O Read Bytes and I/O Write Bytes to see what processes are doing I/O. None are doing anything substantial. The total CPU usage is 0% to perhaps 2% occasionally during this 10 minutes (and most of that is Task Manager updating it's display!).

The motherboard BIOS are the most current and now quite old and stable. There is no RAID ability on this htpc PC.

Here's some more things I've checked:
- there are no network applications accessing the PC; no remote backups, etc.
- there are no events in the event log. The file system is fine (chkdsk etc. report no problems).
- the hard drive passes all tests (i.e. no hard drive issues)
- the following services are not running:
Offline Files
ReadyBoost
SuperFetch (I've tried it with Superfetch enabled but it makes no difference)
Volume Shadow Copy
Windows Search (i.e. Windows Indexing).


This happens every time the PC is resumed. It's really frustrating because there's no way to see what process is doing this. It's almost like Vista has some hidden processes that don't appear on the Services / Processes lists that do some sort of major indexing/checking/rehashing/recovery after every resume.

Another theory I have is that upon Resume, MediaPortal's TV Server starts recording a TV show, or peforming a Comskip analysis on my recordings, or is creating thumbnails of photos or TV shows. But again, no CPU or I/O activity is recorded against any processes and MediaPortal isn't even running. And it happens even when there's no scheduled recording to be done or overdue. It happens when I suspend manually or it does it automatically. MediaPortal may have been running at time of suspend, or (usually) isn't.

Any ideas?

 

[technick]

Look in my config, I desactivate many things like defrag... It can give ideas to you.

 

[chrholm]

I have seen the exact same issue on my HTPC. I also use Vista, and I too could never figure out which process was thrashing the harddrive. I normally used suspend with MediaPortal, but found out that when I used my MCE remote to turn off the computer sometimes Windows would do the shutdown and shutdown in hibernation instead. When restarting it would thrash the drive is shutdown by windows, but not if shutdown by MediaPortal. In the end I installed the IR Server from the forums, so there was no automatic windows handling of the shutdown event from the remote. This has so far solved my problem, although the real reason to the IO activity is unknown.