It still very slow with Dell R730xd, I install OS from ISO file - Virtual CD over IDRAC
I update all new firmware of Idrac and also Raid controller
It only speed < 300Kbyte/s
My line is 100Mbit LAN
(Even If it only 10Mbit LAN, speed will reach 1MByte/s, not too slow like that)
I think this is Very Basic problem, why DELL not fix it for many year to now???
I use SupperMicro many year, it very fast with IPMI Virtual CD iso file