Daze N. Knights said:
Three days ago, I installed Vista 32 Ultimate RTM on a freshly built
system of all-new components. Since then, I've been finding a fix for
this and tweaking that and adjusting something else. All during that
time, until this afternoon, the HDD activity LED tended to show little
activity when I wasn't actually using the pc or while just typing
posts and emails, etc. But suddenly, this afternoon, with virtually
everything about the system finally all set to my satisfaction, the
HDD activity LED became *incessantly* active. For the past several
hours, it has continually blinked at a rate of at least once per
second, nonstop, even while I'm doing absolutely nothing with the pc.
Investigating the situation, I've watched the disk read/write activity
in the Windows "Reliability and Performance" window and have noticed a
LOT of indexing activity; but I have *also* found that, when all
read/write activities periodically cease completely, the HDD activity
LED *continues* to blink. Can anyone help me guess what's going on
here?
Deja vue, anyone?
It's perfectly normal and it's called auto insert notification (or
autorun or autoplay) and people complained about it when they first
installed Windows 95 and again with 98, 2000, and XP. Some people were
crazy enough to believe that their drive was being accessed by Microsoft
to check for piracy (gasp!), but of course that was just rampant
paranoia.
Vista does the same thing, where it polls the CD or DVD drive once per
second to check for a disc or to see if a disc has been changed, and if
so, the auto insert notification calls on the autorun file which starts
the program or plays the music on the disc.
This polling is considered disk activity even if no data is moved, and
most onboard drive controllers (like IDE and SATA) show this as a brief
disk access, so the activity light flashes.
If you disable the autorun feature, the disc polling does not stop with
XP or later versions of Windows. With older versions, like Win98,
disabling auto insert notification would also turn off the disc polling
and the light would not flash.