I'm using the Intel 5 Series 4 Port SATA AHCI Controller driver. I recently updated to the latest version (10.0.0.1046) in hopes of solving the following issue but no such luck.
My disk activity light blinks from startup to shutdown at appx. 1 second intervals. While I have not directly verified what's causing it on my system yet, I found a thread at a Windows forum describing exactly the same issue and the poster isolated it to this driver. He solved the problem by removing the driver because he didn't need the functionality. Unfortunately, I do since I recently installed a SSD and need AHCI support for it. According to the thread poster's data, these accesses include writes. This is particularly troubling as SSDs lifetimes are typically limited by write/erase cycles.
A couple things I forgot in last post: 1) Same thing happens in safe mode and 2) Performance Monitor shows the System process doing the writing Both oif these, along with what I mentioned before, have me pretty convinced it's the driver.
Nevermind. Driver is fine. Blinking light was due to Windows pinging DVD for autorun functionality. Disabling drive (I rarely use it) stopped blinking. Microsoft SysInternals tools show a lot of "idle" state disk writes but that's the nature of Windows according to some feedback I got at Microsoft TechNet. I was able to reduce these (for the sake of SSD longevity) using msconfig to only start what I appear to need. I'm a happy camper.