When the drives are in a clear state, they are doing a slow initialize. That is pretty much a low level format, which can take some time to complete. Once that is done it should go into a Ready state and from there you can remove the drives as they will be erased as if they were brand new.
I've created a VD from 8 drives in a new system build.  I wanted to test hot adding another VD with the system running.  I added an additional two drives, created a test VD from them and the test VD was presented to the OS without issue.  Everything worked as I was hoping for the creation of a new VD.  The problem I'm having is I've removed the test VD and would like to remove the physical disks.  How do I tell the controller to mark the disks for removal?  Can I simply remove the drives with everything running?  Using OMSA I noticed there was an option to clear the physical disks.  I started that operation, however it's been about an hour and it is still sitting at 0% complete.  The disks are 80G SSD's.  Any help is greatly appreciated.  Thanks
Removing Physical Disk w/PERC H800