Hello.

This error may occur when the OS installation image does not have the RAID controller's driver. Can you download the Dell customized image in our support site and try to install. Also, please make sure that the system's firmware are up to date.

For reference: https://dell.to/3eOmoY6

https://dell.to/3eOAPeM

after downloading and installing the iso file as video, the same here. can't found any media driver in installation step Note:- the server was working properly till yesterday

Hi,

What version of ESXi did you manage to download?

Could you access to the RAID controller BIOS to check if the drives are configured. 

Hello Dell-joy

I downloaded the 6.7 Dell-Version and retry to install it again and the same happened \

but I did a hardware diagnostic to check the Health of SSD and all test have passed 

and finally, I try to check the configuration of RAID and found there is no virtual Desk

Hi Ahmedserag,

so, it looks like the controller forgot the virtual disk. That's weird.
Do you see the physical disks within the PERC menu? 
Which PERC do you utilize in this system?

Thanks,
Stefan