I recently purchased a solid state drive (an OCZ Vertex 2 (80 GB)) to use as my primary operating system partition. I also have three other SATA hard drives of assorted sizes. I successfully installed Windows 7 Professional onto the SSD (works awesome, great response time and transfer rate), and used the other three HDDs for data storage.

I was browsing through the Bible of OCZ SSDs, and noticed the following in Section 60-76 - Tweaks and TRIM:

Q. How do I know if TRIM is enabled on my OCZ SSD?

A. In Windows 7, go to start/run/cmd), type the following:

fsutil.exe behaviour query DisableDeleteNotify

It should respond back with:

DisableDeleteNotify=0

if TRIM support is ready and active. If it's not, then type:

fsutil.exe behavior set DisableDeleteNotify 0

After a bit of searching on Google, I found similar results elsewhere (set DisableDeleteNotify to 0, which makes sense since for TRIM to work, the solid-state drive needs to be notified when deletes occur (for the garbage collector) unlike a normal hard drive). When I run the query on fsutil, I get the following result:

DisableDeleteNotify = 48

Following the instructions I found, I set this to 0 instead of 48. However, I am beginning to wonder. Is this all the proof I really need that the OS is using TRIM?

Also, since this applies globally for the computer, is TRIM data being sent to the other hard drives connected to the computer? And if so, would this cause any degradation in disk performance?