Diskpart offers the option to convert a drive to basic

[I know that this is a destructive process so please don't bother posting this information].

If I try to run the command on a dynamic disk that still contains partitions I get an error from the Virtual Disk Service: "The disk is not empty"

If I select the partition in DiskPart and try to delete it I am told that "The operation is not supported by the object. The specified command or parameters are not supported on this system."

If I delete the partition in Disk Manager, the drive is automatically changed back to basic!

So when can you use the "convert basic" command?

 

in diskpart select the disk. I think you can just type "clean" at that point.

OBTW: That is destructive!

yep

 

but that command also auto-converts "dynamic" to "basic"- just like deleting the partitions in the GUI tool - so you still don't need the convet basic command.

 

I have sort of found an answer - in the (highly specialised case) where you convert a disk to dyanmic then do nothing with it - CONVERT BASIC switches it back. 

 

Otherwise, clearing the partitions which CONVERT BASIC requires Before you can run it, always seems to conver to basic anyway - rendering the convert basic command unecessary.

 

Doesn't sound very useful - does it have

You're the best man!!! :D
I've been looking now for over an hour on how to solve the issue of not being able to delete partitions on a dynamic drive. The error was the one mentioned above: ""The operation is not supported by the object. The specified command or parameters are not supported on this system."

I needed to solve this error, because I was getting another one when trying to convert to basic. It was something like: Virtual Disk Service: "The disk is not empty". So the partitions had to be deleted.

"clean" is the command that's doing all the magic. Thank you, cmd guru!!! :)

• Edited by hgpt 9 hours 45 minutes ago