Thank ejn63,

That means my computer will has 2 OS ( windows XP) on 2 harddrive, right? And If I install some others program such as Microsoft Office, Adobe photoshop...These programs will also have on 2 harddrives?

Thanks

Assuming you have a system that supports RAID, after migrating your system to RAID 1 the two physical drive look like one Logical drive to your system.    So when you install something it physically copied to both drives.    But when you look at the drives in the Disk Manager it will show only one disk.     But if one fails you keep going, and can re-build the array after replacing the disk, nothing will be lost.

If yoiu get a failure you will get notified with a Notification ICON of RAID failure.

1. Install a new disk drive
2. Restart computer.
3. In the controll panel open Intel Application Accelerator located in control panel
4. Open up raid configuration right click on new disk and select re-build.

Great!

Thank you so much