Check USB boot in the BIOS and make certain it's disabled.
Also make certain USB devices are not listed in the boot order at all.
I bought an external 2.5" enclosure which works from both USB and firewire. It has an external power connector as well as the USB cable.
So I plugged into my PC, and it wouldn't go past POST. However, if I let the PC get past post, then plug it in, it works fine!
I thought, this must be that there's a powersurge at startup and the mobo doesnt' want to proceed. So I went and bought a second M2-ATX, an 8-port hub, and used the M2 to power the hub, and the HD enclosure.
My mobo has only the hub connected to it, and all other devices are plugged into the hub. Other devices are GPS, IBUS, TS, KB. And the same thing happens! If I plug the HD into the hub, then it doesn't go past POST. If I unplug it, then plug it in after POST, then it's fine! Even just the HD on the hub locks it up.
Does anyone know what the hell is going on? I thought that if I used a hub, the motherboard will not care about external devices being underpowered etc.
I think this has something to do with the rules of USB devices and how they register themselves with the amount of power the draw at the start. Anyone have any insight?
You might want to try to see if there is a newer BIOS out and try updating it.
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sadly there is no update
but perhaps I should take this up with my mobo manufacturer, or even revert to an older bios and try it.
Disable USB Legacy Support in the BIOS, on most Dell computers this can cause problems with printers that have flash card slots. Since you are running an external drive it could be the same type of problem.
not sure I've seen that opiton in there, but I'll look.
car's at the stealer currently, and I'm off for a Eurotrip tommorow evening. hopefully this will solve it if it's in there.
cheers for the info