Very odd HDD detection problem

Exterous

Super Moderator
Jun 20, 2006
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I have a P45 GA-EP45-UD3L motherboard in my HTPC. It has a very odd problem with attached hard drives. Occasionally it will hang at some point during the boot process, typically on the gigabyte splash screen. When I go into the BIOS I noticed that it is detecting the hard drive on two different channels: 1 and 4. The drive shows up twice in the boot priority list as well

If I move the drive - the old unused phantom detection goes away but the previously detected channel becomes the phantom drive

Ex: it was in channel 1 and was detected on 1 and 4
I move it to channel 2. Now it is detected on 1 and 2

There is no way that I can see to specifically turn off the channels in the BIOS but if I turn auto off on the channel the problem goes away for 5+ boots but then it will return.

Any ideas?
 

VirtualLarry

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Aug 25, 2001
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Very wierd. Never had that problem with a number of Gigabyte P35 (GA-P35-DS3R v1.0) and P45 (EP45-UD3P) and X48 (GA-X48-DS5) boards.
 

Exterous

Super Moderator
Jun 20, 2006
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Its probably worth noting it does it other hdds as well

Sounds like a flaw in the bios. Is there an update available?

No - its the latest one. It just started happening fairly recently

Very wierd.
Agreed. Never seen anything like it before

Never had that problem with a number of Gigabyte P35 (GA-P35-DS3R v1.0) and P45 (EP45-UD3P) and X48 (GA-X48-DS5) boards.

Yeah this is the first problem I've ever had with a gigabyte motherboard
 

ericloewe

Senior member
Dec 14, 2011
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Have you tried connecting two drives at once (one of them on the "phantom channel", perhaps) to see what happens? Maybe it'll magically be fixed, since it sounds like a BIOS bug.
You might want to try Gigabyte support, see what they have to say...
 

Exterous

Super Moderator
Jun 20, 2006
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Have you tried connecting two drives at once (one of them on the "phantom channel", perhaps) to see what happens? Maybe it'll magically be fixed, since it sounds like a BIOS bug.

Interesting idea. I will give it a shot

You might want to try Gigabyte support, see what they have to say...

Yeah - I emailed them. No response to my last two emails