I’m trying to set up a software RAID-1 at a new hosted server. It has two 3TB disks in and I’ve installed a fresh copy of Windows Server 2008 R2 Web Edition with SP1 on one of those disks.
A step-by-step tutorial that I found on the Internet says that I need to convert to dynamic disks first. Unfortunately this option is disabled in the Disk Management window. Please see this:
What is going wrong here?
By reading the above question, we know that the author is asking help to convert his 3TB hard drive to dynamic disk, because he find that the option “Convert to Dynamic Disk” is greyed out. Do you know what caused this error?
By observing the image he provided, we can see there is a feature which writes Convert to GPT Disk. What does this mean? In Disk Management, if a disk is initialized as MBR, then there is an option to convert the disk to GPT; on the contrary, if the disk is initialized as GPT partition style, then you can convert it to MBR. Thus, here the author is employing MBR disk on his 3TB disk.
Reading here, you must be wondering: what’s the connection between GPT/MBR and dynamic disk? Well, for MBR disk, you know the maximum storage space it can recognize is 2TB, storage space that exceeds 2TB will be shown as unallocated space. Thus, when you convert a large hard drive to dynamic disk, the allocated space will keep Disk Management from doing the conversion.
So the solution here we can put forward, is to convert the hard drive to GPT at first, and then convert it to dynamic disk.
Step 1: run MiniTool Partition Wizard, choose the MBR disk that wants conversion and select “Convert MBR Disk to GPT“.
Step 2: hit the “Apply” button.
See! All partitions are kept there and the disk has been converted to GPT.
At this time, it’s time to convert basic disk to dynamic disk. Now go back to Disk Management to do this.
Right click the disk and choose “Convert to Dynamic Disk…”
Now you know why can’t convert to dynamic disk and how to solve this issue. Very easy and intuitive guide, right? If you are also troubled by this issue, why not have a try on MiniTool Partition Wizard to make it out. Also, after your trail, if you think this post is helpful, you can share it to more people.