============================================================== sorry, i was wrong, ignore the tilte please, because i not using english OS at the time, so i directly translated the message, but the actuall mesage is: The selected volume is on a dynamic disk when i select the location to save. ============================================================== hi, I so just reinstalled my os a few days ago, and today, i finally finish installing all the basic programs, so i opened up windows back up and select my data drive to backup on (D: ) but under it, theres that yellow triangle notification saying that the selected partition is on a active drive. for my understanding, active drive is only suppose to be my C: drive, so i opened up diskmanagement to check, and C: drive is actually inactive, but it is my system drive. I tried marking D as inactive with diskpart, but it doesnt change anything, it still says it is active, and if i mark C as active in diskmanagement, the OS wont load. So i put my Windows 7 disk back in and change it back to what it was. so, what is the problem here? why isnt my system drive active? and why is my data drive active?