I am installing ESXi4 on a supermicro server that is supported and it encounters a fatal error and cannot write image to selected disk. I have replaced the disk with 3 different drives, so I don't think thats the issue. I have downloaded the ESX 4 trial and installed it on the same server, same drives, and no problems what so ever. According to the documentation the Hardware compatibility is identical.
Assuming the install drive is non-RAIDed drive and it's a SATA drive, try switching the SATA controller to AHCI (or another choice if it's already AHCI set) and see if ESXi 4.0 likes the drive better for installation.
it was the image or download I burned to the cd. Re downloaded and burned to a cd, reinstalled and it's working perfectly... Who'd a thunk
Thanks for your help though, it's nice to have quick responses.. Thanks again