Hi [NAME],   Usually I advise users to update BIOS and iDRAC/LCC firmware parallelly according to their revision and date.  Previously I comment a topic before: [URL]   For your situation, I would suggest going from BIOS 1.6 to 2.0 to 2.1 then 2.4 (yr 2015). Then move to LCC 2.20 to 2.30 to 2.40 to 2.50 then 2.52 (yr 2018). And back to BIOS.    Also, I may recommend reading every BIOS/LCC firmware release notes for any other prerequisites before updating. 
Hello! I hope someone can guide me in the right direction. I got an old R320 server and I'd like to bring it to the latest firmware versions. I read about that it is a dangerous thing to jump directly to the latest versions of the different FWs so I'd like to ask for some help figuring out the right path to update. I currently have the following FW versions: BIOS: 1.5.2iDRAC: 2.15.10.10Lifecycle Controller: 2.15.10.10 Thanks!
R320 update path