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Thread: How to fix Windows Server 2008 R2 bootloader

  1. #1
    Super Grandmaster kingrob's Avatar
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    Thumbs up How to fix Windows Server 2008 R2 bootloader

    Had a near-death experience this morning, when our company's Windows Server 2008 R2 production server failed to boot.

    The only message I got was : BOOTMGR IS MISSING PRESS CTRL+ALT+DEL TO RESTART, which is not what you would like to see when you boot a production server.

    I fixed it, so thought I would post the solution here, as it might help someone else.

    I tried the old fixes, but that didn't work :

    Insert the install CD/DVD and press ANY key to boot from CD/DVD when needed
    Choose "Repair the computer" (or something similar)
    After selecting the OS, if it finds one, open the Command Prompt
    Type DISKPART and hit [ENTER]
    Type LIST VOLUME and hit [ENTER] (remember the drive letter of the CD/DVD which has as TYPE 'CD-ROM' or something similar)
    Type EXIT and hit [ENTER]
    Change to the drive of the CD-ROM
    Type CD BOOT and hit [ENTER]
    Type BOOTSECT /NT60 C: /FORCE /MBR and hit [ENTER] (this does assume the installation is on the C-drive)
    Type BOOTREC /REBUILDBCD and hit [ENTER] (choose the YES option to accept what has been found)
    Type EXIT and hit [ENTER]
    Remove the install CD/DVD and reboot the computer

    So, it didn't work....but this did :

    Boot from a Windows Server 2008 R2 DVD, choose repair, load any drivers for RAID controllers and go to Command Prompt.

    The command prompt will show you : X:\Sources . Then change folder to Recovery and type in : StartRep.exe . This is the full path : x:\sources\recovery\StartRep.exe

    And that was it. Problem fixed and the server is booting again. *phew*

  2. #2
    SmoothOokerMaximus The_Librarian's Avatar
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    Good to know.

    Now the question is - why (and how) did this happen?

    Not good for your nerves though.
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  3. #3

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    Would also love to know how that happened.

  4. #4
    Super Grandmaster kingrob's Avatar
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    Quote Originally Posted by The_Librarian View Post
    Good to know.

    Now the question is - why (and how) did this happen?

    Not good for your nerves though.
    No, it's not good for the nerves!!

    I started having failed backups of the server to the NAS and after a while discovered that I must make the main drive active in storage management (for some reason the reserved space was the active partition - dont ask how that happened!). The backup was successful last night, but then the server just refused to boot after applying patches this morning.

    Check my first post for the fix.

  5. #5

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    Good info I would have done a fixmbr on the box...
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  6. #6

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    Quote Originally Posted by kingrob View Post
    No, it's not good for the nerves!!

    I started having failed backups of the server to the NAS and after a while discovered that I must make the main drive active in storage management (for some reason the reserved space was the active partition - dont ask how that happened!). The backup was successful last night, but then the server just refused to boot after applying patches this morning.

    Check my first post for the fix.

    Obivoiusely you made a the smaller partition the main boot selection. FAIL
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  7. #7
    Super Grandmaster kingrob's Avatar
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    Quote Originally Posted by adielh View Post
    Obivoiusely you made a the smaller partition the main boot selection. FAIL
    That is the very funny part - I didnt. I right clicked the RAID drive (shown as C in storage manager) and set that as active, not the system reserved storage.
    Last edited by kingrob; 10-06-2010 at 01:37 PM.

  8. #8

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    Interesting. What is your opinion of the new improved Server 2008 repair option versus the 2003 option? I prefer 2003 and can see very much of future struggles....

  9. #9
    Super Grandmaster kingrob's Avatar
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    Quote Originally Posted by Conradl View Post
    Interesting. What is your opinion of the new improved Server 2008 repair option versus the 2003 option? I prefer 2003 and can see very much of future struggles....
    The 2008 repair option is really good - and saved my life.

    Still worrying that there should be a repair tool included with the DVD..... wonder how long it's gonna take Microsoft to finally sort NTFS out. *sigh*

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