Help with external LAN drive

I've got an external HDD that is hooked up thorugh the network using RJ45 LAN connection. Basically its a networked HDD that is connected to my switch. Now I'm trying to work out a way to defrag and scandisk it on the network without disconnecting it and running it off USB, which I dont really want to do.

If I got into my CMD prompt and type M: (Enter) the drive or dir comes up and I can scan the files.

Now my question here is, is there a DOS or CMD prompt command that can be used for a defrag and a scandisk, obviously one at a time, like scandisk first followed by a defarg later on.

What I did after I typed M: I typed defrag than Enter and I got an error telling me that defrag is not a recognised command.

 

If you are able to go to the drive through cmd by just typing M: shouldnt you be able to view it in either my computer or mmc with the disk management snappin?
If so you should be able to do it from one of these.

 

You cannot scandisk, chkdsk, or defrag a mapped network drive. It has to be a physical drive. The only utility software that you can use for mapped drives is that provided by the drive manufacturer.

 

In most cases the external disk (like snapserver or Iomega etc.)
are actually running their own OS (operating System)
in most cases a kind of Unix.

And as you know Unix filesystems don't need to defrag or chkdsk.
as they work in another way then FATxx or NTFS.