The vendor documentation for a hybrid SSD/HDD drive says to disable disk defragmentation because it undermines the algorithms that determine what portions of the conventional magnetic drive to store in the SSD portion.
Web searching shows that, these days, Windows 7 does not defragment SSDs by default. I had messed around with defragmentation settings on my computer perhaps years ago, and the information about not defragmenting SSDs by default was not readily available. It's not even clear that this has always been the behaviour of Wndows 7. Therefore, I wanted to check that I hadn't manually turned on defragmentation in the past. I used the administrator account to check several things:
services.msc, "Disk Defragment..." is
Control Panel\All Control Panel Items\Performance
Information and Tools\Advanced Tools does nothing
(3) Right-click the C-drive, select Properties, choose the
tab, and click the
Defragment now... button -- nothing happens.
(4) Nothing happens when I invoke
defrag from DOS command line.
Have I covered all the bases, or is there some other way that defragmentation could inadvertently be started?