Due to vibrations & noise problems in my iMac G5 rev. A, I've decided not to use my internal hard drive anymore, but for backups once in a while. The external hard drives (250 + 300 Gb) are more than enough for use. The internal HD usually falls asleep, but then it's a beachball party whenever I get to a save/open window, when the useless hard drive has to wake up (slowly). Is there a way to tell the system "forget about this HD, until I tell you to remember it" ? If it were an external HD, I'd just keep it off, of course. And I don't want to open my iMac every time... Thanks, Arnaud.