PowerEdge R740 - Update IDRAC9 from 4.10.10.10 to 6.00.02.00 or 6.10.00.00

Hi all

I want to upgrade IDRAC9 version 4.10.10.10, there are two possibilities.

1. For the first version 6.00.02.00 there is this prerequisite 

iDRAC with Lifecycle Controller 3.30.30.30 

Should be always installed or it depends on which version of IDRAC you need to upgrade ?

If so, can the installation be done from IDRAC? It seems to me that there is only one EXE for Windows or one BIN for "Linux". You are forced to upgrade from an OS, right ?

      2. If instead I want to upgrade from 4.10.10.10 to 6.10.00.00 the prerequisite no longer exists .. is it correct ?

   At this point, to avoid an extra step, whenever necessary, I update directly to version 6.10.00.00.

Is my reasoning correct?

Thanks in advance.

Marco