Drive disappears after Vista sleeps

I have three hard drives, two SATA, one IDE. 

Earlier, when I would resume from Sleep, my IDE DVD+RW would disappear.  I then replaced an older IDE drive with a fresh SATA drive.  Now for whatever reason, my one remaining IDE hard drive disappears (and the DVD doesn't anymore) when resuming from Sleep mode.

Searching some Google, I find people with similar problems.  Some say it's the power supply.  I took the culprit out and put it in an independently-powered external USB case.  The exact same thing happens when using Sleep.  Even when I turn off/ unplug/ replug the drive, Vista refuses to recognize it.  The only way to get it back is to restart.

The only things I can think of are messing with the jumper settings (it currently doesn't have one) or replacing it with a SATA drive.  My boot settings haven't changed, so I don't see any need to mess with them.

Thanks for reading my essay and maybe helping

Have you tried looking it up in the Device Manager? (Start > Control Panel > Device Manager)  At the very least you might find more information there.

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