Hi Chris, I found the cause of the error. There are two physical hard disks in the server that are managed by the raid controller as a virtual disk.After the update when restarted the system, for some reason, booting from the virtual disk failed, and this error message was displayed: "No boot device available os Operating System detected.Current boot mode is set to BIOS.Please ensure a compatible bootable media is available." I tried to manually update the BootMGR File, first in BIOS boot mode. Thereafter booting from a Windows installation dvd, at the command prompt "bcdboot C:\Windows /s D:\" did not solve the problem. I came to the conclusion that no BIOS mode was set before. Then I switched to UEFI boot mode.The command "bcdboot C:\Windows /s D:\" solved the problem. The good solution I found here.
After updating Windows Server 2012 r2 on our server (DELL PowerEdge T330), after the restart, a "No boot device available" error message appeared and booting did not resume. :smileysad: Before the update, our server was working fine. What is the solution? Please somebody help me.
DELL PowerEdge T330 - BOOTMGR image is corrupt.