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March 12th, 2020 12:00
Windows Server 2008 R2 Standard - Operating System Not Found
Dell PowerEdge T410 running Windows Server 2008 R2 Standard
Below message upon startup...
"an operating system wasn't found. try disconnecting any drives that don't contain an operating system"
Attempt to boot into BIOS setup and CD/DVD drive not available option to boot to repair disc.
Please further assist.
No Events found!
DiegoLopez
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2.7K Posts
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March 13th, 2020 11:00
Hello,
Please, try to run a Hardware Diagnostics on your PowerEdge Server to check for possible hardware errors:
https://dell.to/2TOoi33
Your server is 11G.
Regards.
anthonymaw
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November 10th, 2021 22:00
Probably too late now but you need to boot the Windows 2008 Recovery CD or Setup CD and go to X:\sources\recovery folder and run the StartRep.exe program a few times. I had similar issue after a power outage on an HP server. "Operating System Not Found". The problem turned out to be a corrupted boot sector and corrupted partition table, according to the logs. Booting the Windows 208 Recovery Disk and go into "Command Prompt" option. The "Repair Windows" might also work. The first one or two times StartRep will not show any Windows installations detected, but it found problems. On the third time it showed that it successfully found a C:\Windows installation and repaired boot problems. One final reboot and the server came back up again.
blvze1707
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May 17th, 2025 20:52
Probably too late now but you need to boot the Windows 2008 Recovery CD or Setup CD and go to X:\sources\recovery folder and run the StartRep.exe program a few times. I had similar issue after a power outage on an Lenovo server. "Operating System Not Found". The problem turned out to be a corrupted boot sector and corrupted partition table, according to the logs. Booting the Windows 2008 Recovery Disk and go into "Command Prompt" option. The "Repair Windows" might also work. The first one or two times StartRep will not show any Windows installations detected, but it found problems. On the third time it showed that it successfully found a C:\Windows installation and repaired boot problems. One final reboot and the server came back up again.