I have gigabyte 77otud3p mobo and 500gb wd caviar black harddisk. I want to replace this harddisk with a 500gb wd caviar blue. Can I use raid 1 or etc to copy all the datas and OS's (win7 win xp and ubuntu 10.10) from the 1st drive to the 2nd drive. Or should Ive configured my system as raid 1 firstly.
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No you CANNOT use RAID1 to copy data!!! When you assign the drives, it will delete all the data.
You have to install the drives on a cpu where the OS is NOT located and simply "Select All" and paste it to a new drive.