Would echo most (but definitely not all) of the comments above.
The "CommServer" (not the "CommCell", which is the collective term that refers to all machines with CV software installed on them) can definitely run on a VM. Yes, some sites run their CS and MA on the same box, and it is indeed tried and tested, but this is not recommended by CommVault, and as one poster pointed out above, you wouldn't do that for medium to large sites, not just because of CPU and I/O resource usage, but for *MEMORY* usage (the CS is memory hungry).
> you need to seperate the CS and MA as the GUI only works when only the commserve is installed.
There are simple ways around this.
I have to disagree with the poster that advised against doing this. You are fine to put your CS on a VM - it works OK and it makes recovery very easy - no need for a second/DR CS.