I am trying to install ESXi 5.0 / 5.5 in IBM X3650M4 (7915) Server. i am getting attached error.
I tried a lot with Firmware Upgrade / Downgrade, Install with different images, with removing different HBA Cards, creating RAID multiple times. but same error is coming same time. I tried with Image of 6.0 its working fine. but my manager want to install 5.0 or 5.5 as we already have two host with 5.0 in our environment.
vSphere 5.0 is a very old version, it's better to upgrade the existing host to the newer versions. (at least ver6.0 I ensure is supported, I did it in servers such as your server's vendor, but M3 model in one of our projects.) But anyway if you want to install a version of 5.x, I think you should use a newer build of ver5.5 (not 5.0 or 5.1). Please look at the following image: