>Sir I would like to ask how can I turn off the Write-Cache in my OS where the VFP data is located?
It might also help to protect the integrity of your data through the following measures, especially for the file server: a) a UPS, b) RAID, c) a stable operating system. Point (b) is perhaps not directly related to data corruption, but helps you avoid trouble nonetheless.
And, of course, you should do frequent backups.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)