Fix boot sector of FAT16/FAT32/NTFS partitions

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Daisy updated on Jan 18, 2022 to Computer Instruction | How-to Articles

The first sector of partition is also known as the Boot Sector. What the MBR is for the entire drive, that the Boot Sector is the first sector of an individual partition, like the MBR, the Boot Sector contains information that the system needs to locate the materials that are needed to start the operating system. A corrupt or missing Boot Sector is a serious problem. Without it, the partition can not be accessed.

Possible (but not all) symptoms

Invalid media type reading drive
Abort, Retry, Fail?
File system is displayed as "RAW"
Windows may ask if you want to format the drive
File names contain "weird" characters
"Sector not found" messages

Recover lost files

If you want to recover files due to deletion, format, partition lost or damage, system crash, etc. especially under Windows Vista/2008/Windows 7, our free data recovery software - Data Recovery Wizard Free Edition is recommended. It works well with hardware RAID and hard drives, SD and Memory Cards, etc.

 Download for Win Recovery Rate 99.7%
 Download for Mac Trustpilot Rating 4.4

Note: To guarantee a high data recovery chance, install EaseUS data recovery software on another disk instead of the original disk where you lost files. 

Step 1. Launch EaseUS Data Recovery Wizard on your Windows 11, Windows 10, Windows 8, or Windows 7 computer. Select the disk partition or storage location where you lost data and click "Scan".

select the disk on Windows  to scan

Step 2. This recovery software will start scanning the disk to find all lost and deleted files. When the scan process completes, click "Filter" > "Type" to specify lost file types.

choose the recovered data type

Step 3. Preview and restore lost Windows files. You can double-click to preview the scanned files. Then, select the target data and click the "Recover" button to save them to another safe spot in the PC or an external storage device.

recover windows 10 lost data

Fix Boot Sector

1. If you cannot access the FAT16/NTFS partition and the partition was marked with "X", right-click the partition and choose Fixboot. Partition Table Doctor will automatically check and repair the Boot Sector of the partition.

2. If you cannot access the FAT32 partition and the partition was marked with "X", right-click the partition and choose Fixboot. There are two choices:

"Auto" mode: Partition Table Doctor will automatically check and repair the Boot Sector of the partition. We recommend you choose this model.

If the "Auto" mode doesn't work, you could choose "Interactive" mode. You must input the Label for the partition or file name (the file is in the Root Folder). If you do not know what file name to input, follow the file name that is suggested:

Bootable partition:
io.sys, msdos.sys, ntldr, bootlog.txt

Other partitions:
_restore, recycled

File name can not support long name or wildcard character by DOS version of Partition Table Doctor.

3. Browse: In both of the modes, Partition Table Doctor will provide you a preview of the folders and files in the root directory on this partition before "Yes" option being chosen to make the change valid on a dialogue box. If it appears the same as the previous one that means this function can fix it.

4. Save and reboot computer and you will find everything is just what it was, backup your files!!!

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