How to set boot disk flag with diskpart

Question

My Windows Server 2008 R2 won't start and stops with Stop 7B, so I start the recovery console and use diskpart to check the disk. There are to partitions one of Type 17 and one of type 07, the detail disk command show me that the disk is not a boot disk. How can I set this boot flag with diskpart? Or is this flag only set true if the MBR works fine. I try following commands:

bootsect /nt60 ALL /force /mbr
bootrec /fixboot
bootrec /fixmbr
bootrec /rebuildbcd

the last command show me the number of OS is 0, so how can I set this flag to true?

Here is the output of diskpart detail disk:

Answer 1

The diskpart in recovery console doesn't allow you to make a partition active(bootable).

Use Gparted Live.

http://en.wikipedia.org/wiki/Diskpart "On the Recovery Console, which is included in all Windows 2000, Windows XP and Windows Server 2003, there is a diskpart command which is significantly different from the one included in the actual operating system. It only provides functionality for adding and deleting partitions, but not for setting an active partition. The utility is also provided in the Windows Recovery Environment, the successor of the original Recovery Console"

Answer 2

I have successfully restored an VHD GPT-disk from a Windows 8.1 PC combining information from this and other threads on another windows 8.1 Hyper-V-Server.

My steps:

1. Rip the disk using Disk2vhd from Microsoft Sysinternals.
2. Mount the vhd in the file system of the Hyper-v-host. (i.e dubble click the vhd).
3. Download and install AOMEI Partition Assistant.
4. Start AOMEI Partition Assistant and select the VHD-disk which appear as an ordinary disk. Mark the disk av select to convert disk to MBR-disk from the Disk-menu.
5. Remove all partitions that contains recovery disks and other non Windows partitions.
6. Detach VHD from HOST (Restart may be necessary).
7. Create a new Virtual Machine in Hyper-V Manager and use your modified VHD.
8. Boot VM from Windows Installation disk an go to recovery console and select command prompt.
9. Use diskpart as described below:
   • DISKPART (to open the partition utility),
   • LIST DISK (disk number(s) will be shown),
   • SELECT DISK n (where n is the number of the disk - probably 0),
   • LIST PARTITION (partition number(s) will be shown),
   • SELECT PARTITION n (where n is the number of the Primary partition you wish to make Active),
   • ACTIVE (the selected partition on the selected disk will be made Active),
   • EXIT (to exit DiskPart),
   • EXIT (to exit the Command Prompt),
   • Restart computer.
10. Repeat step 8. 11.Rebuild MBR, as described bellow, ie:
    • bootrec /fixboot,
    • bootrec /fixmbr,
    • bootrec /rebuildbcd.
11. Exit command prompt.
12. Use Recovery options to restore windows system files (Both partial recovery and advanced recovery options may me used).
13. Repeat 13 until VM boots from your VHD.

Answer 3

DISKPART (to open the partition utility)

LIST DISK (disk number(s) will be shown)

SELECT DISK n (where n is the number of the disk - probably 0)

LIST PARTITION (partition number(s) will be shown)

SELECT PARTITION n (where n is the number of the Primary partition you wish to make Active)

ACTIVE (the selected partition on the selected disk will be made Active)

EXIT (to exit DiskPart)

EXIT (to exit the Command Prompt)

Restart computer.

Answer 4

The only solution for me was to write the Minitool Partition Wizard BootCD (or Gparted) to USB using MultiBootUSB(or YUMI) utility.

Answer 5

I realize that this is an old thread, however . . .

Steps 9 and 10 above by g2mk worked for me when I needed to slide a Win81 partition to the unallocated space at the front of the drive, because . . .

I originally had XP in partition0, then I installed Win81 (aka Dual Boot) and it installed Win81 to partition1. Btw, there's a procedure to remove the old Microsoft partition0 OS elsewhere on the web (says for Win7)(btw,you can use gparted to set Win81 as Boot, which equals Active via Diskpart). Then I used Gparted to slide the Win81 partition over the unallocated space. Then I needed to use Steps 9 and 10 above to get rid of 0xc000025 on winload.exe and be able to boot into Win81 on the HDD.

Btw, unless I'm missing something, everyone should note that as written, these procedures are for Windows installed on a MBR disk (ie. not for Windows installed onto a GPT disk on UEFI hardware).

HTH

Regards . . .

Answer 6

While attempting to load Windows Server 2003 on a new drive of my Windows 7 machine, I somehow wiped out the boot on the Windows 7 drive.

Windows could not start because of a computer disk hardware configuration problem

After three days of poking around, I was able to use the following steps to correct the issue:

1. Boot from Windows 7 Install Disk
2. Select "Repair" Option
3. Select "Startup Repair" (this will run but not find any issues)
4. Select Advanced Options to get to "Command Prompt"
5. bootsect /nt60 SYS
6. Restart the computer normally