display rescan duration

[simoncn]

Your startupScan setting is correct and doesn't explain the very long rescan time.

Please try the following:

1) On the System tab of the Properties window, set the .logPrefix property to milliTime
2) In the log window, set the logging level to Verbose
3) In the log window, click Clear
4) Leave the log widow open and do a rescan

You will see a timestamp in the log window for each rescanned folder. How long approximately does each folder take? On my QNAP TS119 (should be the same speed as your NAS), I am seeing an average time of about 50ms per folder (20 folders per second).