(here you are substituting your drive number for the physical drive, the count for the counts you got for primary.img and secondary.img in step 7, using seek instead of skip and replacing the LBA address shown with LBA address you wrote down from Step 4.) You can simply open another command prompt, cd into the dd directory again and issue the following commands, which are essentially the reverse of steps 8 and 9 with some important changes:ĭd if=primary-backup.img of=\\.\\physicaldrive3 bs=512 count=34ĭd if=secondary-backup.img of=\\.\\physicaldrive3 bs=512 count=33 seek=5368709087 If you do end up an issue, your due diligence of backing everything up will come in handy now. Type gptgen.exe -w \\.\\physicaldrive3 (substituting your drive number for the 3 shown in the example) and after the 3 seconds it takes to inform you of the changes it has made you can then reboot your computer.Īmazing! without destroying the data, in 3 seconds the task is complete! Now, open a command prompt and cd once again into the gptgen folder.
![file grldr.mbr windows 10 file grldr.mbr windows 10](https://i2.wp.com/iuni.ru/uploads/3eadb.png)
You should now have some confidence that if issues occur, you can now undo what has been changed. Step 10: Goody, you now have a backup of what is going altered by gptgen. This will create an image file called secondary-backup.img in the dd directory. (substituting your drive number for the physical drive, the count for the count you got for secondary.img in step 7, and the replacing the LBA address shown with LBA address you wrote down from Step 4). This will create an image file called primary-backup.img in the dd directory.ĭd.exe if=\\.\\physicaldrive3 of=secondary-backup.img bs=512 count=34 skip=5368709087 (substituting your drive number for the physical drive and your count for the count you got for primary.img in step 7). Yours may differ, so please do the mathĭd.exe if=\\.\\physicaldrive3 of=primary-backup.img bs=512 count=34 For me the number was 34 counts for primary.img and 33 counts for secondary.img. In the dd command this is called a count. Step 7: Next you must do some math- The dd command will be instructed to image in 512 byte sectors when you initiate the command, so you must first divide the number of bytes you found for primary.img and secondary.img by 512 to get the number of 512 byte sectors dd will copy. Open a command prompt and use the cd command to change into the extracted dd directory. This ensures that if a problem occurs you can restore those sections back to their original state, should gptgen not work as expected. Step 6: Now that you have all the info you need about what gptgen will modify and where on the drive it will make those modifications, you will next use a program that is often used in the Linux world called dd to back up the sections that will be modified by the gptgen program. We will do nothing further with these files, them having served their purpose to let you know how big the alterations to the drive will be and where on the drive address-wise they will take place. Yours may differ, so please do not use these numbers in the next step without checking yours first. For me, primary.img was 17,408 bytes and secondary.img was 16,896 bytes. look at the number of bytes of each file. The two you are interested in are called primary.img and secondary.img. Step 5: Type dir to see the list of the "test" files gptgen created. Write the LBA address of the second line down as you will need it later in Step 9. Please note the second line will likely be different than shown above.
![file grldr.mbr windows 10 file grldr.mbr windows 10](https://howpchub.com/wp-content/uploads/2020/05/20200520030605.png)
Write secondary.img to LBA address 5368709087. This basically creates two test files instead of modifying the drive partitions and outputs a few lines, but the important ones should look like these: Step 4: Once in the gptgen folder you extracted, type the command (yes, exactly like as written) gptgen.exe \\.\\physicaldrive3 (substituting your drive number for the 3 shown in the example). Open a command prompt and use the cd command to change into the gptgen folder.
#FILE GRLDR.MBR WINDOWS 10 DOWNLOAD#
Step 3: Download and unpack diskpart and the Windows version of dd. For me, the drive was 3, so I will use that as the example.
![file grldr.mbr windows 10 file grldr.mbr windows 10](https://i0.wp.com/compconfig.ru/wp-content/uploads/2017/02/33-nastrojka-Grub4DOS.png)
Locate the number of the drive that you wish to convert. Step 2: Once in diskpart, type list disk. Step 1: Open a command prompt and type diskpart. I also used the dd program (also open source) to back up the drive partitions just in case something went wrong. To begin with, the process is as anticlimactic as it is simple. Please Note that you do not want to use this on the system (os) drive, only for data drives. Therefore I will give my experience on a Windows 2012 R2 Server. I just registered so I could give this product a glowing review! The only part lacking on this product is documentation and what to expect when using the product.