If it was defrag it would run on. I'm talking about a ticking like a clock every one or two seconds. The LED just lights, then goes out.
Last time I saw something like that was when Windows 95 was out. A driver update and a new BIOS fixed it.QuoteIt doesn't stay on like when the HD is being accessed steadily such as during defrag.
Defrag-when-idle doesn't just access your hard drive steadily. It'll defrag a couple seconds, stop a couple seconds to see if any other program needs to perform any operations, defrag again a couple seconds, etc.
I think we are mixing issues. One is if you get excessive HD access that interferes with using your own machine(as in Vista pre SP1.) The other is a ticking LED. The ticking LED will not go away no matter if your HD is fragged, defragged, the defragger is not running, you boot to safe mode with no network support, windows search on off, superfetch on off. In short, it's a hardware polling that's likely some defect in a driver.
The people who have HD access that interferes with them using their own machine don't have my issue. If you google you'll see that over the years there has been a steady complaint with a small number of people with HD LED ticking like a clock. If it was common there would be more posts about it. That's why I deem it a hardware polling issue.
All these other suggestions about turning this or that service off, eliminating scheduled tasks, yadda yadda, been there, done that. It's not it.











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