Take the 2-minute tour ×  As in the Windows 7 Disk Policy
Options:  [x] Enable Write Caching on the device [ ] Turn off
Windows write-cache buffer flushing on the device   Is the first
the cache on the physical disk, and the second the windows
cache?  (I've googled, but didn't find a clear answer).
share|improve this question  2 Answers 2  up vote 7 down vote
accepted  See "more information" section from
http://support.microsoft.com/kb/332023:  Many disk devices
provide enhanced performance through the use of an onboard
cache, which provides read-ahead caching for data that is being
read from the disk, and write-behind caching (or delayed writes
or "lazy" writes) for data that is being written to disk. In
some cases, it is important for data to be written to the
physical disk immediately, and not retained in the disk's
onboard write cache to be written later during an otherwise idle
moment. This prevents loss or corruption of this data if the
disk or controller (wherever the write cache is implemented)
sudde