I have A8N-VM Motherboard and 250GB IDE HDD. Can i connect 500GB SATA II HDD and transfer data from my IDE HDD to SATA II HDD

leave the chip alone.
the a8n is old, not new it is 2005 mobo, 12 years old you buy it. as new and seller lied to you as most do now. fleabay.
the coin cell is bad. on mobo
bios is NOT bad but I bet now you wrecked the BIOS.
not told at all if using PATA IDE drivers 20 years old
or modern SATA drives 2001 and newer.
nor if you ran SATA hdd smart test first, if fails no oS on earth can run on any bad HDD, of any kind.
leave bios alone (means do not flash or replace the chip)
there are 10versions of the A8N mobo
if the wrong flash BIOS is used you bricked it and I bet you did.
next time learn to ask , how to test a hDD first
for sure relics LIKE THIS.

Check your AHCI (or ACHI, can't remember) settings in your BIOS. Turn them off, use "standard pata mode" even though you're using a SATA drive, and try again.

Yes you can.

Yes it will. Just make sure to buy the proper hdd. If your board has SATA II connections then you would need a SATA II hdd. If it is just SATA then a SATA II drive would not work. Your other option would be an IDE hdd. If your system has a cable that looks like a big ribbon connected to your existing hdd then it's an ide drive. Hope this helps & please remember to rate my answer. Thanks.

ok reboot you computer and press delete when your bios boot screen appear then go on your hdd-ide-sata screen and look your sata configuration and set it on sata-enhanced or compatible this is becose you are running on windows xp.
bye and good look

Yes you can. You may have to go in BIOS or and select your SATA as the first drive to boot off of though, else it might try to boot off the old IDE. But once you're in windows, it will appear as another drive in my computer.

Thanks and please take a moment to rate as fixya.

Yes, your motherboard features 2x SATA II ports so you can add any sata II hardrive

Hi LP,
I’ am very familiar with ASUS motherboards. I am thinking you have posted two questions or more referring to the,
ASUS K8V-MX board. When you sign into you're FixYa account you than need to click on you're profile. Within you're profiles are the questions you have posted. Click that question to add or see the expert's answer. If you need another question (about the same item) re-post within that same question. You can even copy the link to an older post & past that link into you're next question. (Than I can read you're last question & my responce).
LP you have me all mixed up. I'll answer the question you have posted above. In the future please provide you're old post so I understand better.

There is nothing wrong with IDE 250GB drive or the SATA drive.
The problem you are haveing is setting the correct settings.

The ASUS K8V-MX can support two serial ATA SATA drives. The SATA drive's can only run at 1.0 version. 1.5GB transfer speed & not SATA II, the 3.0GB speed.

How to setup the SATA drive?
Please disconnect any other drives (IDE) & a second SATA drive that may be connected to the system. Except the CDROM drive.
Using you're manual the SATA drive should be connected to SATA1 port. Page 1-24 in you're manual.
Put you're windows CD into you're CD-ROM drive & boot the PC. You will see, Press any key to boot from CD... (press any key on your keyboard). Windows will start to install. Durring installation of windows the system will restart. You will again see, Press any key to boot from CD... (DO Nothing)!
Just allow windows to conintue on its own. Windows will continue to install it's self. This will happed once again, & again do nothing. Windows will finish installing it's self.
After windows has finished, load the ASUS CD into you're CD-ROM drive & install it's driver software. Restart the PC.
You must register windows. Do so.
Than update windows through windows update service. (This will take some time to complete). (Do not install service pack 3).
If you have an IDE drive 250GB in size & you installed windows on it. You must erase the drive or it will conflict with you're new installation on the SATA drive. To do this, look on the IDE drive & you will find a large white sticker. Printed on there is instructions of how to set the drive pin. Set the drive up as a slave drive. (This is only temporary).
Power off the PC & unplug the power cord. Connect the 250 IDE drive's power cable & data cable. Plug in the power cord to the PC & turn on the PC. Windows will load. Right click once on the start button & slide up to & left click on Explorer.
Find the 250 IDE drive, it should be drive letter D or E. Right click the proper drive letter & format the drive.
( Do Not format, Local_Drive C:\ ). Once the format is complete, power down the PC by clicking on the start button & click turn off the computer. Once off, unplug the power cord. Change the pin on the 250GB IDE drive to Master with a slave. Take the 40GB drive & change it's pin so the 40GB drive is a slave.
Connect the 250GB drive to the end of the IDE data cable & connect the 40GB drive to the next connector of the same IDE data cable. Re-check all power cables & data cables for good connections before closing the case. Plug the power cord in & power up the PC. Everything should run just fine.
Setting the pin for you're IDE drive's can be very confusing. Click on the link below. This will give you an idea of how to set you're pin for a master drive, master with a slave drive. If you post the name ST****** of you're two drives I can post the correct pin locations from Seagate's web site.
http://www.seagate.com/images/support/en/us/mxo_ata_jumpers.gif

Have more questions about this post?
Good luck!
Mike

Your motherboard does NOT support SATA drives, without an added SATA controller. It does support PATA drives, such as the Samsung SP2514N and the Seagate PATA drive you listed, as well as any other PATA drive. A PATA drive may be referred to as PATA, IDE, ATA100, ATA133, or even ATA66, but not SCSI, Ultra320, U320, or SATA, SATA II, SATA100, SATA300, etc.

The Seagate drives are easy to identify, their model number ends in AS if it is a SATA drive, and just A if it is a PATA drive.

No but you need to ensure that the drivers for your SATA controller are installed correctly (as they probably are not installed) http://uk.asus.com/products1.aspx?l1=3