2014-03-08, 15:32 (This post was last modified: 2014-03-08, 15:36 by Milhouse.)
You should be able to disable FIQ using the settings you have already tried, what do you get with "dmesg | grep FIQ" when you have disabled FIQ (and still experience HDD/network problems)?
Texture Cache Maintenance Utility: Preload your texture cache for optimal UI performance. Remotely manage media libraries. Purge unused artwork to free up space. Find missing media. Configurable QA check to highlight metadata issues. Aid in diagnosis of library and cache related problems.