Gigayte BOIS keeps changing priority of a booted hdd

Dear Experts

I have a Gigabyte motherboard GA-945GCM-21S ,,,,I have four hdds connected to this motherboard two Segate IDEs (ST340016A and ST340010A) 40 GB each to be used as storage and two SATAs (one Segate 500 GB , and other western digital 1TB) as shown in the screen shot below :

http://i53.tinypic.com/oscpc1.jpg



SATA 500 GB (ST3500418AS) has two NTSF partitions (created by Acronis) one of them has OS windows 7 ultimate and other partition is for storage. SATA 1 TB has two NTFS partitions (created by Acronis) as well ,both of them for storage.

SATA 500 GB ( ST3500418AS ) been given first boot priority in the BOIS , all of the sudden whenever I restart a desktop BIOS keeps changing the priority fro SATA 500 ST3500418AS (should be first in the list) from the first to the third and move 40 GB IDE ST340016A to be the first. As can be seen in the snapshot below :

http://i54.tinypic.com/n48mz4.png



What I did I upgraded the BOIS recently and I removed the battery (Battery voltage is checked as well) but still I am experiencing same issue.

What could be the cause of this issue ?

Thanks

I have a Gigabyte motherboard too. Sometimes I boot off my flash drive and when I do, I have to change the HDD priority order every time because it always ends up at the bottom of the list. I'm not sure what exactly is going on for you, but you could try changing the HDDs to different sata ports. Look at the motherboard manual to determine their numbered order. Also you could probably revert back to the previous bios if it didn't have the issue. Other than that, you may want to ask Gigabyte directly what they suggest. Maybe I'm missing something, so hopefully someone else can help you more.

This one is a bit old as well.

I'd suggest changing the battery with a new one, and making sure that the battery holder terminals are clean.

Otherwise, I can come up with a few outlandish and largely unprovable theories why the BIOS would suddenly change settings...