I have a8v-vm motherboard...my ad dvd writer was not working.so i purchased new sata dvd rom but now problm is thai i cant boot from it or instal xp buy this......what i do now..what is the setting in bios i do..?

Asus A8V-VM Motherboard coming with SATA RAID option, thats why you could not see the detected HDD in system BIOS. But you can see the the detected HDD in RAID BIOS. You can enter to RAID BIOS that will pop up after system BIOS. If you are using old version of WinXP it will not detect the RAID controller of you motherboard. Thats why you cannot able to install WinXP. While you booting from WinXP CD press F6 key when the WinXP installer prompted for third party driver. Copy the RAID driver provider in driver CD to a Floppy Disk (INF file) and insert it, hit enter to continue the installation. If you are using WinXP Service pack 2 or higher you do not need this step it will automatically detect the HDD.

Make sure all the connectors are plugged in and in the correct spots. Then go to the bios and enable the SATA drives to be read. After that you should be able to boot from CD and install XP.

You're Intel motherboard does support up to 4 SATA hard disk drives including SATA CD-ROM / DVD-ROM drive, reader/writers. This MB also includes two serial ATA IDE ports.
The most likely reason you're system is not booting is because all SATA ports are all seen as Master drives. By connecting the SATA DVD-ROM drive the bios auto configured the SATA ports.
You'll need to enter the bios when you're system boots-up. Press the F2 key on you're keyboard right after hearing a single beep. You will than enter the bios main menu. Listed at the main menu are devices connect to the motherboard. (Instruction on how to move around in the bios is listed at the bottom of the screen). Mainly, the hard disk drive or (drives) and the SATA DVD writer. You'll need to open the Boot tab. Look for boot order. You want the boot order set like so;
First boot device: [Floppy disk] drive; if one is connected.
Second Boot device: [Primary Hard Disk] drive.
(The drive with windows installed on it). (This drive may be ATA IDE or SATA; you did not provide that information).
Third Boot device: [DVD-Rom] drive. Save and exit the bios. The system will auto restart.
You're windows operating system should load correctly after the auto re-start.
The SATA data cable and the SATA power cable should be checked for good connection. It only takes a little bump to make either loose.
Here is the link to Intel for you're motherboard;
http://downloadcenter.intel.com/SearchResult.aspx?lang=eng&keyword=%22+D102GGC2+%22

Good luck!
Mike

Yes you can use a usb external cd/dvd-rom to any operating system as long as the bios allows you to, most bios's have the capability.

When the external usb drive has been connected power up the mechine, in post it should tell what to press to enter your boot menu without entering your bios and choose usb drive to boot.

Kindly check again in BIOS under device configurations SATA mode is disabled if not than disable it.

create a sata diskett[floppy] using your motherboard cd and press F6 when booting from xp cd this will install sata raid drivers for your motherboard

http://www.asus.com/Product.aspx?P_ID=gxG8gfPAL8pSnNn6

here u can download audio driver ...

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

You do not have SATA drivers on the disk
Download "driverspack" one word from here
http://driverpacks.net/DriverPacks/

the Driverpack massstorage one
Download "Nlite" install it
You may have to get someone to do it for you
copy your Windows CD to hard drive and insert driverpack into the driver section of it
then burn to another CD
"Nlite is easy to use just read instructions

Check the SATA/RAID controller setting. It could have been set to [Disabled] Refer to your user?s manual for a detailed description on how to enable the onboard SATA/RAID controller by adjusting the jumper or BIOS settings. Regards SparkGap