Hi Macrumors Members, I hope sincerely you can help me with the following problems: There are several external HDD's connected to the Mac and an additional internal HDD. All Disks have one HFS+ partition for Data only. These Disks put themselves to sleep automatically. The Computer runs OS X Lion 10.7.1. Spotlight setting: When performing a search -> Search the current folder. The Problem is, when using Lion, sometimes the Datadisks "randomly" are waking up. That's very often the case when using Mail or Safari for instance. This is really annoying, it speeds down the system for some seconds and the sound of the awakening disks many dozen times a day is driving me crazy somehow as well. There is really no need to wake these disks up by Lion, except for the itunes and iphoto library (which I can controll by myself very well), there are absolutely not connections for the system, at all, to these disks and I would be so happy if they were sleeping until I want them to wake up. The other problem occurs within the spotlight search function (Command + Space) which I'm often using for launching applications or looking for frequent files stored on the system disk. After hitting Command + Space all additional Disks wake up. Actually, I like spotlight and don't intend to deactivate it for the Datadisks but would prefer it prevents scanning these Disks generally. So, my questions are, does anybody know how to: -Prevent the system from waking up these disks uselessly -Prevent spotlight from waking these disks without disabling it's indexing and the manual finding possibilty Thank you for reading and best wishes from germany!