Mount & unmount volume notifications
Solution 1:
If Growl is installed and you want to turn off just the notifications for volume mounts and dismounts (as opposed to getting rid of Growl altogether):
- System Preferences, Growl panel
- Applications tab
- Select HardwareGrowler from the list
- Configure
- Notifications tab
- In the dropdown, for each notification (e.g. Volume Mounted) you want to disable:
- Select it and untick the 'Enabled' box.
(Edit:) Or, as fnurl points out, remove HG entirely. I find it useful enough to keep, but tweaked to my liking. It alerts me if my WiFi starts bouncing, f/ex. YMMV, as always.
Solution 2:
Check to see if you have Growl installed - it will be in System Preferences. Sometimes applications install it without your permission - even though the growl team explicitly don't allow it. Its safe though, I use and love the product.
Solution 3:
I use HardwareGrowler to get these messages.
Perhaps HardwareGrowler is launching at startup? If you do not want this, go to
System Preferences → Accounts → Your Account → Login items
and find HardwareGrowler and remove it from the list.