Boot sector recovery is the solution to your computer problems. Recovering boot sectors of NTFS partitions
How to recover hdd boot sector
Almost every user who works with a computer is faced with the problem of a damaged hdd sector. There may be a number of reasons for this, ranging from improper shutdown to deep penetration of the virus.
Active File Recovery;
EASEUS Partition Master.
And this, of course, is not all, but these programs most often cope with the task and enjoy good reviews among users. Alas, this is not always able to restore the boot sector of the hdd as quickly as possible; problems may arise with determining the type of file system or the presence of this sector will not be visible.
This method is suitable for those who do not care about the information on the media and it is important to restore the boot sector of the hdd as quickly as possible. After this procedure, in 80% of cases the work is completely restored. But this method is often resorted to as a last resort, because... The data on the disk still plays an important role for almost everyone, especially if it is a work computer.
If the user is encountering a problem for the first time and has absolutely no idea how to restore the hdd2 boot sector, this utility can very quickly cope with the task. However, not without the participation of the user himself, it will be necessary to understand some points. What makes the program particularly difficult is the English interface. If you know technical words, the system will be understandable.
Let's consider this method point by point:
1) Find Create a new log file, if necessary enter the log.
3) The next step is to select the partition type among Intel, Sun, Mac, etc.
4) After this, possible operations that can be performed with the disk are opened. Select Analyze.
6) Selecting geometry on the disk
7) The final steps in the “Master Boot Record” section are responsible for rebooting the sector. You need to select the damaged disk, then check the sectors and rewrite the MBD.
With the correct course of action, after a reboot, the disk should function again and at the same time have all its data in its previous form.
The second method is to use it on Windows
For various reasons, the first option may not work, and the question of how to restore your hdd3 boot sector remains open. To understand the recovery process itself, let’s take a closer look at what MBR is.
MBR is the very first sector that is found on the disk, it has a special table with partitions, and a boot program that reads the data and its path, starting from the hard drive and ending with the partition of the installed operating system.
1) First, you need to turn on the computer and select boot from the installation disk or USB drive, press any key and in the Windows installation window select “System Restore”, if a problem is detected, click fix and reboot.
2) If this does not help the boot sector, open “system restore” again and select “next”, write bootrec/fixmbr in the command line. This command will make the master boot record compatible and solve the problem of its corruption. But nothing will change in the partition table.
3) We issue the following command bootrec/fixboot, this action writes a new boot sector that will be compatible with Windows. Click “exit” and restart the computer.
Overall this should work! But as practice shows, restoring the hdd boot sector is not so easy, and in this case there are other methods and commands:
1) The bootrec/ScanOs command performs a full scan and search for operating systems; if found, it will be visible on the screen.
2) bootrec/RebuildBcd is used to add the found Windows to the general boot menu; the combination Y and enter will complete the addition process.
If this does not produce the desired effect, a command such as bootsect/NT60 SYS in an individual case can restore the hdd boot sector by updating the main boot code. Then you need to click “exit” and restart the computer.
If Windows does not load when you turn on your computer and the process freezes on a black screen, your hard drive's boot record (MBR) may be damaged.
External manifestations
When an error appears on the screen, doubts disappear.
Other information about a malfunction of the HDD bootloader may also be displayed.
The text information may vary depending on the classification of the error. But when the word boot is mentioned, it is clear that there is a problem with loading.
You can find out how to restore the MBR on this page.
Reasons
Please note the common causes of HDD boot sector failures.
Two types of bootloader
Older systems prior to Windows XP used the NT Loader (NTLDR). In Windows 7, Vista and subsequent versions of the OS, UEFI and EFI began to be used. Therefore, old and new systems are usually not installed on the same PC. Otherwise, NTLDR overwrites UEFI.
Third party software
Errors in the boot sector of the HDD can occur when using even popular programs for the hard drive partition. This happened to me with Acronis. This happens because such software replaces disk loading drivers with its own. This can corrupt the original MBR entry. Therefore, it is better to use the built-in methods for partitioning your hard drive from Windows.
Viruses
Viruses sometimes wreak havoc on the MBR. Therefore, after restoring the HDD boot, check your computer with anti-virus programs.
If you are sure that the cause is viruses, then clean your PC of them before repairing the MBR. For this purpose, there are utilities from well-known antivirus companies, for example, Kaspersky Rescue Disk. They are provided free of charge on official websites with instructions for use.
Any of these programs is included in the software package for a CD or DVD, which allows you to boot from a CD, find and remove viruses on the HDD.
Windows 7 Boot Recovery
Sector repair is performed from a CD or USB flash drive with the operating system installation package.
- First, insert the DVD into the drive or flash drive into the USB connector with the Windows distribution.
- Then you need to allow startup from these devices. This is done in the BIOS settings.
Changing download sources
Technology of the following order:
Be sure to press F10 when exiting, otherwise the changes will not be saved!
Working from a CD or flash device
Proceed in the following order:
- After the reboot, the following message will appear at the bottom: “Press any key...”. It asks you to press any key. Click. It won't work out otherwise. If the inscription has already disappeared, repeat everything from the beginning. To do this, press three keys at once: Ctrl+Alt+Del. This will cause the computer to restart.
- When you boot from the DVD or flash drive, the Windows installation window will appear. At the bottom left, select “System Restore”.
- You will be prompted to connect network capabilities, select languages or a drive letter. You don’t change anything and get to the choice of systems.
- Select the desired Windows and check the box next to “Use recovery tools...”.
- If the required system does not exist, it should appear when you click “Download drivers”.
- Continue with the “Next” button.
- In the next window, select “Startup recovery”, and the MBR can be reanimated automatically.
- If the sector does not work, then press “Command Line”.
- On the command line, call the Bootrec utility and write for it to repair the MBR: bootrec/fixmbr. You end each command with the Enter key.
- Then create a new boot sector: bootrec/ fixboot. To exit the program, type exit and remember to press Enter.
If the fixes didn't help
There is another MBR resuscitation command - bootsect /NT60 SYS. After that, try to boot again.
If the attempt fails, write on the command line like this: bootsect/rebuildbcd. A search will be performed for operating systems installed on the PC.
Now try logging into Windows again. Please note that there will now be one more system in the list. Try to enter each of them. It should work!
Non-standard way
If all sector recovery options do not help, it is recommended to reinstall Windows. And no matter how much you want to do it sometimes! Isn't it true?
I thought so too and decided to put another small system nearby. What does "small" mean? This is a bootloader system. It is empty: I did not install drivers or my programs on it, because I don’t work in it. But it's loading!
I achieved what I needed: a working boot area appeared on the hard drive. Now I log into the old system normally. The downside is that I lost about 14 GB of disk space. If you are not afraid, you can use this method!
How to fix a sector in Windows 8-10 and Vista?
For Vista and later versions of Windows, the same methods are suitable as for the “seven”, only the design is different. For example, in the “eight” he is like this.
But the points remain the same. Therefore, we will not describe them. Use the instructions described above for Windows 7.
On Windows XP
In the "experiment" sector, the principle of resuscitation of the sector is similar. But the entrance is a little different. Now you will see it:
- After booting from the CD, system files are copied to the hard drive.
- Then the action selection window appears.
Friends, many of you have repeatedly had problems loading the operating system and asked the question how to restore Windows 7 boot and make the operating system boot normally. In this article, we will look at the most common ways to restore the Windows 7 bootloader, which help in most cases.
1. Restore Windows 7 boot using the recovery tool
Boot with your version of Windows 7. The main thing is that the system bit size matches (32-bit or 64-bit). Also, it is desirable that the release coincides (Home, Professional, Ultimate).
Instead of installing, select System Restore.
Go to the System Recovery Options window and select the Startup Repair tool.
After this, the recovery program will search for errors in the boot sector and boot partition of Windows 7 and, if found, will try to fix them. After this, you will need to reboot the system and Windows 7 may boot normally.
If you were unable to restore the boot using the Windows 7 recovery tool the first time, try repeating this process 1-2 more times. This often helps since a repair tool can't always fix multiple problems in one pass.
2. Reboot Windows 7 using the command line
If you were unable to restore your Windows 7 boot using the automatic repair tool, then try using the command line. Boot into your version of Windows 7 and select System Restore instead of installing.
Go to the System Recovery Options window and select the Command Prompt recovery tool.
After this, a window with a black background will appear in which you will need to write several commands.
Enter the following commands in turn:
| bootrec/fixmbr |
| bootrec/fixboot |
| bootsect /nt60 ALL /force /mbr |
| exit |
Switching the language is done using the key combination “Alt” + “Shift”. After entering each command (line), you need to press the “Enter” key.
Then restart your computer.
After this, in most cases, problems associated with the boot sector and bootloader of Windows 7 will disappear and the operating system will boot normally.
If, after using the command line, Windows 7 still does not boot, then try again using the automatic boot repair tool, as we discussed above.
3. Restore Windows 7 boot with system reinstallation
If you were unable to restore the operating system boot using the methods described above, you will most likely have to delete the partitions.
Before reinstalling Windows 7, copy all important files from your hard drive to or. This can be done using any bootable LiveCD. Please note that the external drive or flash drive must be connected to the PC before booting from the LiveCD, otherwise it may not be detected.
If, due to boot errors, you cannot reinstall Windows 7, then remove all partitions from the disk using a third-party utility, for example, Acronis Disk Director boot disk. After that, try again by creating new partitions.
If, when reinstalling Windows 7 at the stage of setting up the disk (creating partitions, selecting a partition for installation) or when restarting the computer during the installation process, you encounter the same boot errors, then launch the command line and run the commands that we discussed above.
In order to prevent loading problems in the future, you need to determine what exactly led to the problem and not repeat these mistakes. If you are unable to restore Windows boot, or other errors occur with the installation and operation of the system, please visit the website http://esate.ru where you will find instructions for solving various problems with the operating system.
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The boot sector is a specific area on a hard drive or other storage device that serves to initially identify the device. It is from this sector that the initial loading of the operating system or any special program is performed.
Instructions
Instructions
No matter how advanced the operating system is, it is impossible to boot without two sectors on the hard drive that contain the code necessary to run any operating system. The first sector is called Master Boot Record (MBR); it is always located at the address: sector 1/cylinder 0/head1 and is the very first sector of the hard drive. The second most important sector is the Boot Sector, located in the first sector of each volume.
Master Boot Record
Master Boot Record is the most important disk structure; this sector is created when a disk is partitioned. The MBR sector contains a small code called the Master Boot Code, as well as the disk signature and partition table. At the end of the MBR sector is a two-byte structure indicating the end of the sector. It has a value of 0x55AA. A disk signature is a unique number located at offset 0x01B8 and allows the operating system to uniquely identify this disk.
The code located in the MBR sector does the following:
- searches for the active partition in the partition table;
- searches for the starting sector of the active partition;
- loads a copy of the boot sector from the active partition into memory;
- transfers control to executable code from the boot sector.
If these functions fail to complete for some reason, one of the following system error messages is issued:
- Invalid partition table;
- Missing operating system.
Note that there is no concept of MBR for floppy disks. The boot sector is the first sector on the disk. Also remember that every hard drive contains an MBR sector, but boot code is only used on drives that have an active primary partition.
Partition table
A partition table is a 64-byte structure used to determine the type and location of partitions on a hard drive. The contents of this structure are unified and independent of the operating system. Information about each partition takes 16 bytes - thus, there can be no more than four partitions on the disk.
Information about each partition begins at a certain offset from the beginning of the sector, as shown in the table. 1.
Note that only volumes with a System ID field of 0x01, 0x04, 0x05 or 0x06 are accessible under MS-DOS. But volumes with a different System ID for this field can be deleted using the FDISK utility.
Cylinder, Head and Sector fields
The Starting Cylinder, Ending Cylinder, Starting Head, Ending Head, Starting Sector and Ending Sector (commonly known as CHS) fields are additional partition table elements. The boot code uses the values of these fields to find the boot sector and enable it. The Starting CHS fields of inactive partitions point to the boot sectors of the primary partitions and the extended boot sector of the first logical drive in the extended partition.