The Dell Catalogs and their update frequency and location have been a mystery to me this last week.
Trying this method www.hypervisor.fr/ update my system from DRAC shows that the ftp.dell.com/Catalog.xml.gz file is from 5/23/2016. It tells me the latest R730 BIOS is 2.0.2, when in fact the latest bios is actually 2.1.7.
However, LCC, DRM, OME all show that the latest bios is 2.1.6 (because the catalogs haven't been refreshed).
The problem that bothers me is that there are at least two catalog locations. ftp.dell.com/Catalog.xml.gz (older) and ftp.dell.com/catalog/Catalog.xml.gz (which is what LCC, DRM, OME all seem to use).
The problem with using the catalog in the root directory with iDRAC is that it's older (why is this even in a different location?)
If I try and use the one in /catalog/ iDRAC cannot update, it says the updates fail instantaneously in the Job Queue. I believe this is because when you try and update, it uses the current catalog location in as the root folder, so it's looking for /catalog/FOLDER123123123/UPDATEFILE.EXE and it doesn't exist, because it's not meant to be under the catalog folder. It seems the DRAC updater logic uses the catalog folder as relational to the firmware, when it should just be looking for ftp.dell.com/FOLDER123123123/UPDATEFILE.exe (but it doesn't).
Hope that makes sense?