Solved no OS found

[Jandek]

Hello everybody,

I installed Windows 7 on a used PC (HP XW4600) recently.
This PC contains 2 Harddisks (1 Samsung and 1 WDC).
My idea was to install the OS on the Samsung and to use this drive for data too.
I intended to use the WDC for backup only and to disconnect it normally.

After installation everything works OK untill I take the WDC from the BIOS list of devices to boot from.
Then the computer does not start up: it will give the message "no OS found".

Disk Management gives the results as given in the attachment.



For those who do not speak Dutch:
Schijf 0=Samsung, Schijf 1=WDC, Opstarten=boot.

Note that volume Y (on WDC) is "system" and volume C is "boot"!

My question is:
what should I do to have the computer starting normally with the WDC disk disconnected?

 

[gregrocker]

The System boot files are on the wrong HD. This can happen when all other HD's are not unplugged during install.

The solution is to Mark C Partition Active,

power down to unplug the other HD,

boot into Win7 DVD or System Repair Disk to run Startup Repair - Run 3 Separate Times until Win7 starts and C holds the System flag.

Now you can plug back in the other HD making sure Win7 HD remains set first HD to boot in BIOS setup. Mark Y partition Inactive: Partition - Mark as Inactive - Windows 7 Forums. This should keep it from ever interfering but if it does move the data off to wipe it with Diskpart Clean Command before repartitioning in Disk Mgmt.

 

[whs]

And if you are lazy like me, you can do this. Make sure you understand the warning in the tutorial.

http://www.sevenforums.com/tutorials/209885-bootmgr-move-c-easybcd.html

 

[Jandek]

I have followed the instructions as given by GregRocker: using the System Repair Disk and run Startup Repair.

This action has resulted in the situation I wished: the WCD drive may be disconnected without having a problem at startup. And also after reconnecting it the system starts normally.

Check:
Disk Management gives now:
- for partition C attribute System is added
- for partition Y attribute System is removed.

Thank you very much.