Windows 7: DiskPart help

Ok i couldn't mark my D partition as active because there wasn't a "Mark as Active" in diskmgmt.msc. so i tried to do it in command Prompt like it is described here.Partition - Mark as Active

But the problem is that there is 3 partitions listed while i only have 2 (C and D) as you could see it here. so what should i choose should i choose partition 1 and set it as active as partition 0 rises and error?

The second partition listed is an Extended partition - that contains the third partition - it will just show as one in windows.

You cannot mark your "D" partition active because it is not a Primary partition.

I

huh? you mean i cant change the system volume of my comp? and what if i select partition 2 and set it as active?(its a logical drive )

You can only mark a Primary partition Active.

Therefore the "system" volume must be a primary partition.

You could create another primary partition , if you wish.

So is there a way to mark my D partition as active? anyway?

He told you that ONLY a Primary partition can be active.

Ok i gave up on trying to change the active drive. so now can i format the C partition with the Xp setup CD. and obviously the boot files for windows 7 will also be removed right?. so can i get the boot files back with a system repair disk?

You haven't said what you are trying to achieve.

If you really want to make "d" active - you would need to convert it to primary first.

You need a partition manager to do that.

Best Free Partition Manager Freeware for Windows 7, Windows Vista, and Windows XP 32 bit & 64 bit. MiniTool Free Partition Manager Software Home Edition.

what i am trying to achive is that i have windows 7 and windows xp in a dual boot config. now i want to remove xp. but xp is in the active drive.

In that case, you can use the 7 repair cd to format the xp partition ( use diskpart and select the correct partition) e.g.
sel disk 0

sel par 1

for fs=ntfs quick.

act

exi

Then run startup repair a couple of times.