Finder and harddrive disappear...??? ("Hot-Plugging"?)

Hi there,
I just installed and connect my new My Book Home 500 gb harddrive, and have been having some issues. First, I partitioned the drive into three equal sizes, on FAT32, and Two Mac OS extended journal ed, one for time machine, and one for the Mac HD. The problem though is that when I boot with the drive connected, my finder and harddrive don't show up, and the boot time is about 3 times as long (about 1.5 minutes). When I boot and then connect the drive, it takes about 30 seconds to boot, and all the drives show up. I've heard about the "hot-plugging", but I'm not completely sure about it. Does is mean that I should boot with the drive connected, or is it safe to just plug it in after booting. (I know that I need to eject the disks before I unplug or turn off the device.)
I guess my other question would be, if it is safe to boot with the drive connected how can I get around the issue of my finder and all harddrives missing?
Thanks

I don't know if this would still apply to newer Macs (MBP or otherwise) and external firewire or USB drives, but some time ago, there was an Apple support document that there could be issues such as yours if you leave an external drive mounted/plugged in while the Mac is either in sleep mode or shut down, something to do with the system having a problem with the startup order.
Although I've since acquired another iMac and a new MBP, I still do what I've done since reading that article: unmount/unplug my external drive when I'm done using it (before letting Mac sleep or shutting it down) and I've never experienced any of my Macs not recognizing any of my externals. When I need to use the external, I turn its' power on, plug in the cable and, voila, the icons are on my desktop.
You might try this (it is certainly safe!) and see if that takes care of your problem.

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Finder and harddrive disappear...??? ("Hot-Plugging"?)

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