This means the disk has a gpt partition style. How to change the style of GPT partitions on a laptop - Livehack. Installing Windows on a GPT partition

Computer engineering does not stand still. Every year there are some updates and improvements. Thus, in new operating systems, the familiar BIOS was replaced by the new UEFI interface, and GPT was used instead of the MBR partition style. When installing older versions of operating systems, this can cause inconvenience, as the error The disk has a GPT partition style appears. The solution to the problem is to change the style to MBR.

We solve the problem in a standard way

This method is the most reliable, since you can control the entire process. Its disadvantage is that absolutely all information is deleted from the hard drive. It will not be possible to restore it. Therefore, you need to save valuable data on removable media in advance.

So, we need to call the command line. To do this, press the key combination Shift And F10. If you are using a laptop, hold down the key Fn. The command line can also be opened via the menu Start. Next we will work in it.

Let's go to the DiskPart command interpreter, to do this, enter diskpart in the command line. Next you need to open the list of disks. To do this, enter the command list disk. The disks available on your computer will appear in front of you. The one with the GPT style will have an asterisk next to it. We need to transform it.

The next step is to select the drive to clean. Enter the appropriate command select disk X, where X is the number of the disk that we are converting. After that, enter the cleaning command clean. It is at this stage that all information from the disk will be deleted. The screen will display Disk Cleanup Successful.

After this, you can proceed directly to converting the partition to MBR. Enter the command convert mbr . Once the process is completed, you will see that the Selected drive has been converted successfully.

For the disk to function properly, it is necessary to create a partition where all information will be stored. This function is performed by the create partition primary command. The assign command will associate the created partition with the system. After you see the message Assigning a disk name or mount point was successful, you can exit the DiskPart interpreter using the exit command.

After this, you can install the operating system on the disk.

Using the installation window

The setup window can also be used to convert the section style. When using this method, the system itself performs the action, and you have no ability to control the process. Thus, there is a possibility of incorrect partition conversion. This option is only suitable if the hard drive capacity is less than 2.2 TB.

You can configure the disk using the appropriate function during Windows installation. To do this, select the disk and click on the Disk Setup button. In the window that appears, you will see a list of all available sections. They must be deleted and then recreated with the desired style. To delete a section, select it and click the Delete button.

After cleaning, the Partition Selection window will display the Unallocated disk space position. Select it and click Next. The rest of the actions will happen automatically.

Special programs

You can convert the section style using programs specially designed for this. Their advantages lie in a convenient, understandable interface. This will not delete your data from your device. One of the most popular programs is Minitool Partition Wizard Bootable.

Installing an operating system without converting the disk

This method will be more suitable if you are installing new versions of Windows. When installing "seven", the error window appears most often. This could be caused by installing a 32-bit system or booting in a non-EFI mode.

To check the boot mode settings, you need to open the BIOS (hot keys appear on your screen when the computer boots. Often this Del or F2). There you need to enable UEFI Boot Option Filter. You can find this parameter in the Features or Setup sections. By default, the value may be CSM.

Typically, after saving new data, Windows allows you to install GPT from disk. If you use a memory card, the error may appear again. In this case, you must overwrite the UEFI-enabled installation files. Next, the normal installation of the operating system from removable media is performed.

I hope this information was useful to you and you were able to correct the error yourself.

Hello friends! Today's article is an analysis of a popular topic. Not everyone likes Windows 10. For various reasons, but the main one is its resource intensity; weak devices do not handle it very well. Plus frequent updates. Therefore, many people prefer to install the familiar Windows 7, which has proven itself well. And the “ten” or “eight” are removed.”

And now, imagine, a person bought a laptop, wants to install “seven” instead of the installed “ten”, but he can’t do it. Before you reinstall, it will be useful to know what partition styles are, why they are different, and which one is best to use.

Computers are such a fickle thing, every day we learn something new... The speed, performance of our devices and the amount of memory for storing settings and data are constantly increasing. Let me give you an example. Maybe you have already encountered such a problem - you bought an 8 GB flash drive, but only 2 GB of data fits there? The computer writes: there is no space, the file is not being written. It's all about the file system.

The old FAT file system cannot store more than 2 GB of data. This phenomenon is purely mathematical, and now rare, we will not go deeper. But now, you have reformatted the flash drive in the NTFS system and everything is in order, you can write everything there until the space runs out. Same with section styles. More capacious and faster devices for storing information have recently appeared in nature - a new partition table has become necessary to support these new devices. To understand the difference, let's first remember what style is MBR.

What is MBR partition style?

MBR- abbreviation of the English phrase Master Boot Record, translated into Russian - “master boot record”. It was in this style that all Windows computers worked until about 2010-2011. This system has been in use since 1983. Every computer has a basic input/output system (BIOS). It is recorded in a specific chip on the motherboard. After turning on the computer, this system is programmed in such a way that it first tests itself; in fact, all devices are checked according to a given program.

If the equipment has been found, you now need to determine how your computer will boot further. There can be several boot options - from a hard drive, flash drive or CD. These options are determined in the BIOS. A hard drive can have several partitions, one of which contains your operating system. Function MBR This is precisely to transfer boot control from the BIOS to the device on which this boot record resides, that is, the hard drive.

MBR is a set of instructions, that is, a small program that is located strictly at a specific address on the hard drive (usually the very “first” sector or block of the hard drive). The BIOS looks for this entry at the specified addresses on the disk, checks it, and if everything matches, it transfers boot control to MBR. Further MBR « looks through the partition table, finds the active partition of the hard drive (it is assigned a label of certain symbols) and carries out its instructions for further loading the operating system.

If there are more than one active partitions, this means that the partition table is incorrect and loading does not occur, the system hangs. Also, loading does not occur if there is no longer a single active partition. Or there is no boot record itself. This is the most common “failure” - damage to hard disk sectors containing boot record or partition table data.

What does "GPT disk" mean?

As they say, time passed. And now the flagship of computer developers (the company InteL) began to implement a new product in its microcircuits - an extended version of the firmware (interface). BIOS has become EFI. For us it looked like this (BIOS):

And on later versions it may now look like this (EFI):

In appearance, heaven and earth, the functionality has really expanded, new settings have appeared, for example, support for the Russian language :) But, in essence, everything is about the same, it just looks different. By using EFI supports the creation and functionality of sections in the format GPT.

Section style GPT differs in that here hard disk partitions are tied to a unique identifier, and the sign of an “active” partition is no longer a label, but this very unique identifier or GUID Partition Table. It is created using a special algorithm, different from creating a record. MBR. Thus, the hard disk partition table contains its own unique identifiers for each partition.

EFI uses GPT the same way the BIOS uses the Master Boot Record. But the point is not which tools are best to use to identify the active partition, but that the new partition style allows you to work with partitions on a hard drive with a capacity of more than 2.2 Terabytes. Where the possibilities of MBR have already been exhausted.

Surprisingly, at the turn of the 2000s, a disk with a capacity of only 3 gigabytes seemed very capacious to me. Now I have the same feelings about 3 terabyte disks. And on GPT On a disk, you can create partitions up to 4.9 zettabytes in size... It’s unlikely that such devices are on sale now, but we must think that such devices will appear in our country - sooner or later. Section style in format GPT created to support high-capacity devices that will appear in the next five years.

Storage capacities are growing, but MBR still left in EFI for compatibility with older operating systems and security. It is located at a different address, written in different units of measurement (LBA) and is protected from deletion, but can still be used in EFI. By the way, for security, the master boot record is duplicated; it is now at both the beginning and the end of the disk. There are also interesting complex technical nuances, but I think the main point is why the style was invented GPT We have already understood and now it will be easy for us to answer the next question.

Which style should you choose for creating hard drive partitions - MBR or GPT?

Old computers do not support GPT style of sections, there is nothing to choose from. In other cases, we look at the capacity of your hard drive. If you have a laptop or computer with a hard drive of less than 2.2 terabytes, then it makes no fundamental difference for you which partition style to use. All the benefits of EFI, and with it GPT, begin to take their toll only if you have capacious, fast disks with large amounts of information. For such devices, boot, disk read/write speed is increased using the new partition table and EFI.

Of course, you need to remember that not all operating systems can work with the new style. The old ones will also not be installed on the new markup. For our computers, which have a hard drive standard of 500 GB, this problem is not relevant - which is better, which is worse, because everything will work the same. Now, if you use new high-capacity hard drives for storing files + server - in this case there is of course an advantage GPT will be explicit.

For now, another problem is relevant for us, factory settings. When purchasing a device, it turns out that the disk is already partitioned in GPT style and you need to repartition the partition in order to install Windows 7 on it. But we’ll continue talking about this in

Quite often, when installing a new “OS” on an “empty” computer or as an additional one, owners of large hard drives are faced with a problem when the system displays a message stating that installing the OS on the selected partition is impossible, since the disk partition style is used as one of the attributes GPT. What this term is and how to solve such a problem will now be discussed. So let's get started.

GPT partition?

First, let's define what this term is. In fact, there is nothing difficult in understanding it.

If it is indicated that the disks selected for have a GPT partition style, this only means that they have an attribute set that allows them to work with volumes greater than 2 TB, and there is a new partition table. If there are standard MBR partitions, the OS itself simply does not recognize a larger volume, and is strictly limited to only four virtual partitions. To overcome these limitations, the GPT partition style is used. But even here there are pitfalls.

GPT partition style, initial conditions for installing the OS in them

To ensure correct installation of the operating system when the selected disk has a GPT partition style, at least two initial conditions are required:

• computer with UEFI BIOS support;
• 64-bit Windows OS version 7 and higher.

Provided UEFI support is available, Windows can be installed on a GPT partition without any problems. If the motherboard does not have such support, even when trying to install a 32-bit system in such a partition, an error warning will be issued. You can work around the problem by converting the partition to a standard MBR, which will be discussed below.

Error correction options

So, if an installation error does appear, you can use several methods to resolve the problem. Among all the options, there are two main ones:

• setting up the initial UEFI BIOS parameters to prepare the system for installing the OS on a GPT partition;
• converting the GPT partition style to MBR at the OS installation stage;
• preparing the disk in setting the parameters of the existing operating system.

Using BIOS UEFI Settings and System GUI

The first option assumes that we have a GPT partition style, the initial conditions are met, and the new OS will be installed on it.

To begin, when starting the computer system, you need to enter the BIOS UEFI settings (special keys or combinations thereof are used for this). If you already have Windows 8 or its version 8.1 installed on your computer or laptop, you can use the universal Charms panel.

In the BIOS settings you should set the following parameters:

• loading UEFI instead of CSM (BIOS Setup or BIOS Features section);
• SATA hard drive mode with AHCI parameter instead of IDE (Peripherals section);
• disabling Secure Boot (exclusively for Windows 7 and below).

After the reboot, the error when installing the system from optical media will no longer appear. However, if you plan to install from a bootable flash drive, it is recommended to rewrite it so that it has UEFI support.

GPT partition style: Convert to MBR when installing OS

As for the conversion, it can be done at the stage. You can change the GPT partition style to a standard MBR using the command line, which at the initial stage is called via Shift + F10 (for some laptops Shift + Fn + F10).

In the console that appears, you should enter the following commands one by one, pressing the enter key after each of them (without the punctuation marks indicated in the list):

• diskpart;
• list disk;
• select disk X (X is the letter assigned to the disk or partition);
• clean;
• convert mbr;
• create partition primary;
• active;
• format fs=ntfs quick;
• assign;
• exit.

Once the commands complete, you can proceed to re-install the same 32-bit operating system into the converted partition without any problems. Please note that during the conversion process, all data in the selected partition will be destroyed.

Converting to MBR on an installed system

If your computer already has an OS installed, conversion to MBR can also be done. There are two tools for this: systems and the command line.

In the first case, by right-clicking on the computer icon, a context menu is called up, where the control line is selected, after which you go to the section. Right-clicking on the selected GPT disk or partition opens a submenu in which the “Convert to MBR disk” command is used.

Note: first, you need to delete all partitions on the disk that you plan to convert (to do this, use the delete volume command in the context menu called by right-clicking on the selected disk).

In the second case, first call the command console (cmd) from the “Run” menu (Win + R), after which the following commands are sequentially written in it (as before, without any punctuation and pressing the enter key after each of them):

• diskpart;
• list disk;
• select disk X (assigned drive letter);
• clean;
• convert mbr.

Once all command processes are complete, you can install a new operating system. And the error message will no longer appear because the GPT partition style attribute is missing as such.

Convert to MBR without data loss

To simplify your work and not use too abstruse Windows tools, you can give preference to third-party powerful utilities.

Most specialists and experts in this field agree that the most suitable software packages are Minitool Partition Wizard, Acronis Disk Director and the like. The conversion technologies are very similar, but working with such utilities is much easier. It is believed that even a novice user can figure them out.

Bottom line

It remains to be stated that if there is support for initial conditions, it is better to use a GPT disk by making simple settings in the BIOS UEFI. In all other cases, you cannot do without converting to MBR. And if you are installing Windows for the first time, it is better to immediately change the partition. In case of re-installation or replacement of the OS, the second method is also suitable.

And one more detail. When purchasing or installing a new hard drive with a capacity of more than 2 TB, it is recommended to first make sure that the entire computer system meets the initial parameters and that the motherboard supports UEFI. Only in this case is its correct operation guaranteed. Moreover, this applies not only to the installation of the OS, but also to the subsequent saving of user information on it.

Today we will figure out how to install any modern version of Windows (including Windows 7 or Windows 10) on a hard drive with a GPT partition table on an outdated computer with a BIOS that does not support modern. The need to perform such a trick arose when trying to install Windows Server 2008 R2 x64 on an HP DL380 G8 server (HP DL servers do not yet support EFI) with local disks whose total capacity in RAID 5 exceeds 4 TB. With a standard Windows installation on an MBR-partitioned disk, only 2 TB is available in the system. You won't be able to partition or access the remaining 2 TB of disk space from Windows. The only way to take advantage of all available disk space is to convert the disk layout to GPT.

This article describes how to configure Windows to boot from a hard drive partitioned in a GPT partition table on a computer running a classic BIOS (which does not have UEFI) or Legacy BIOS mode. The Windows operating system cannot boot from GPT disks on older BIOS systems. To get around this limitation, we will use the technique of transferring the Windows BCD boot loader to a separate small USB flash drive (or HDD drive) with an MBR partition table. This flash drive will only be used to launch the Windows boot loader, which should then transfer control to the main Windows image located on a disk with GPT partitioning. The instructions are universal and should work in both Windows 7 and Windows 10 and any other supported 32 and 64 editions of Windows.

Advantages of GPT over MBR

What are the benefits of using GUID Partition Table (GPT)— a new format for placing partition tables on a hard drive. The GPT partition table allows you to bypass some of the limitations of the classic MBR partition table. Let's list the main points:

• Supports hard drives larger than 2.2 TB(maximum available disk size for GPT is 9.4 ZetaBytes (9.4 × 1021 bytes))
• Supports up to 128 partitions on the disk (there are only 4 partitions in the MBR)
• High reliability, achieved by duplicating the partition table in multiple locations on the disk and checking the partition table using cyclic redundancy check (CRC). This way, the disk partition structure will not be lost if the first sectors of the disk are damaged.
• No need to use logical partitions, subject to various errors

Booting Windows from a GPT disk

According to the official Microsoft documentation http://msdn.microsoft.com/en-us/windows/hardware/gg463525.aspx, all of its operating systems, starting with Windows Server 2003 SP1, support GPT volumes as data disks, but boot Only 64-bit versions of Windows installed on motherboards that support the new UEFI (Unified Extensible Firmware Interface) specification will be able to use GPT volumes. Thus, it will not be possible to install or boot Windows from a GPT disk on older computers with a classic BIOS.

Advice. There are several workarounds, allowing you to boot Windows 10/7 x64 on BIOS systems from a GPT disk. To do this, you need to use a boot disk containing a UEFI development environment emulator - DUET (Developer's UEFI Environment) simulating EFI. In this configuration, the computer's BIOS starts booting with SYSLINUX installed, which loads the UEFI emulator (DUET). DUET, in turn, calls the standard Windows bootloader - bootx64.efi. It is also possible to convert the disk to hybridMBR mode (hybrid mbr) using the Linux gdisk utility. However, in both cases the procedure is quite complex and requires the user to have good knowledge of the Linux OS.

Once again, we note an important fact that should be forever understood: booting Windows x64 from a GPT disk is only possible on a system with UEFI.

Thus, if your computer runs on a BIOS, and you need its disk to contain a GPT partition table, the easiest way would be to add another hard drive (regular or SSD) with MBR partitioning to the system, install Windows on it and then boot from him.

We will try to slightly modify this technique. To do this, we will need a small USB flash drive or SD card (at least 64 MB) with MBR markup, on which we will place the Windows boot manager - bootmgr. This bootable flash drive will provide the initial boot of the system and transfer control to the main system bootloader located on the GPT volume.

Important. The system must support booting from a USB flash drive or SD card at the BIOS level.

This way we can ensure that any (both 32 and 64 bit versions of Windows) can be loaded !!! ) from a GPT disk on a system with a BIOS that does not support EFI.

Installing Windows on a GPT disk on a computer with BIOS

Let's say we have a computer with BIOS (no UEFI) whose hard drive uses the new GPT partition table. When you try to install Windows on a gpt disk on such a computer, the Windows installer will throw an error:

Windows cannot be installed to this disk the selected disk is of the GPT Partition Style

There is an error in the Russian version:

Advice. You can convert a disk from MBR to GPT with the loss of all data by pressing Shift+F10 on the Windows installation screen. And run the following commands on the command line:
Diskpart
select disk 0 (if the system has one hard drive)
clean (clean disk contents)
convert gpt (convert partition table to GPT)

In this situation, installing Windows 10/8.1/7 directly on a GPT disk is only possible in UEFI mode through emulation of this environment using DUET. But in this mode, it is possible to install only 64-bit versions of Windows, and the procedure itself, as we said above, is quite complicated.

In this case, it is much easier to install Windows on an MBR disk in normal mode, and then convert it to GPT using the utility gptgen.

Gptgen - convert the disk partition table from MBR to GPT without deleting partitions

The Windows Disk Management console allows you to convert a disk from MBR to GPT only “clean” unpartitioned disks. The console will not allow you to convert partitions on a disk on which the OS is already installed.

To online convert a hard drive from MBR to GPT, you can use a small utility that allows you to convert the partition table format on the fly without having to delete all partitions (without losing data).

Important. It is highly recommended before performing the conversion copy all critical data to external media. And although I have not yet encountered the utility working incorrectly gptgen, which would lead to a complete collapse of the file system, I recommend that all users still save their important data before converting the partition table, so that later there are no claims against the author of the article :)

Download the gptgen utility and unpack it into a random directory (for example, c:\tools\gptgen-1.1).

So, the conversion of the partition table to GPT was successful!

Transferring the Windows bootloader to a USB flash drive

We reboot the computer and make sure that the BIOS system cannot boot from a hard drive with a GPT table. That's how it should be! We connect a small USB flash drive or SD card to the system. We boot from the installation CD / USB disk with Windows (either an installation disk with Windows 10 or Win 7 will do, as in our case) and on the installation screen click Shift+F10 by opening a command line console:

1. Run the command: diskpart
2. Let's display a list of disks in the system: list disk . In this case, the system has two disks: Disk 0 – a hard disk with a system size of 40 GB (* in the Gpt column indicates that this disk contains a GPT partition table) and Disk 1 – a USB flash drive with a size of 1 GB.
   
3. Let's look at the partitions on the disks and the letters that are assigned to them. Select the hard drive: select disk 0 and display a list of partitions on it: list volume
   Based on the size of the partitions, you can understand that the system is installed on partition 2 (Volume 2), which is assigned the letter D: (this letter may not correspond to the letter of the system drive, which is displayed in Windows itself)
4. Let's create the necessary partitions on the flash drive:
   select disk 1 (select a flash drive)
   clean (cleansing disk contents)
   create partition primary size=1000 (we create a primary partition on a USB flash drive, in this case 1 GB in size)
   format (we format it in the FAT32 file system. Do not use the NTFS file system for a USB flash drive, as it will not boot from such a partition)
   select partition 1 (select the first partition on the flash drive)
   active (mark the section as active)
   list volume (let's display the list of partitions again. In this example, you can see that the partition we created has index 3)
   select volume 3 (select it)
   assign letter=G (assign a free drive letter to it, for example G)
   
   
   list volume (make sure that the partition on the flash drive is assigned the letter G)
   
   exit (Exit diskpart utility)
5. Copy the boot environment files from the system disk to the USB flash drive: bcdboot d:\Windows /l en-us /s g:
6. Let's write the boot code onto the flash drive to ensure bootmgr (Windows boot manager) loads: bootsect /nt60 G: /mbr /force
7. Reboot

Go into the BIOS and set the maximum boot priority to your USB (SD) drive. Save your changes. If you did everything correctly, the system should boot correctly. You can make sure that your Windows is on a GPT disk in Disk Manager ( diskmgmt.msc), opening the properties of the system disk. On the Volumes tab it is indicated that the partition table type is GPT (Partition style - GUID Partition Table)

This method of transferring the bootloader to a separate USB flash drive will allow you to take advantage of all the advantages of the GPT partition table and use the entire capacity of the hard drive (more than 2.2 TB in size) on systems with BIOS (without the UEFI environment). A similar trick can be done with the following (even 32 bit versions) of Windows:

• Windows 10/Windows Server 2016
• Windows 8, Windows 8.1
• Windows Server 2012 / 2012 R2
• Windows 7
• Windows Server 2008 / 2008 R2
• Windows Vista
• Windows Server 2003 SP1/2003 (64-bit)
• Windows XP x64

Disclaimer. The article is offered as is. All of the above operations were tested on a virtual machine - no testing was carried out on real machines. If someone tests a similar configuration and operation of the system on physical hardware and writes about the results, I will be very happy. According to available information, some old computers with BIOS do not allow working with GPT disks in principle; such disks are simply not detected.

You also need to understand that every time you turn on/reboot the system, your USB flash drive with the MBR table and bootloader on it must be connected to the computer, otherwise Windows simply will not boot.

You may encounter the message “Windows cannot be installed on this disk” at the stage of selecting an operating system installation partition if not supported download from the selected storage medium. The reason that caused this obstacle is stated in the installer's message.

Reasons There may be several such problems:

• worn out or damaged SATA cable;
• disabled hard drive controller in BIOS;
• malfunctions the storage medium itself;
• absence AHCI driver included in the Windows distribution;
• does not match the format BIOS - UEFI or Legacy - disk partition style - GPT and MBR, respectively.

Let's talk about the last two problems in more detail.

Problem with AHCI

The appearance at one time of the connection mode for the SATA storage media controller AHCI, which replaced the old IDE, entailed additional requirement to the composition of the Windows distribution kit - the presence of the corresponding drivers. AHCI driver support is announced in OS versions starting with Vista.

But Windows 7 does not always want to be installed on a computer with active mode SATA AHCI controller. There are two ways out here - change of distribution(AHCI drivers can be cut by packagers of pirated assemblies) and AHCI switching to old IDE mode. In the latter case, you need to enter the BIOS, find the section for setting the parameters of the SATA controller (sections may be called “Integrated Peripherals”, “Storage Configuration”, etc.) and change the preset AHCI to IDE.

Convert MBR to GPT

Windows will not install if the disk has wrong style sections:

• GPT, while the UEFI interface in the BIOS is disabled;
• MBR, while UEFI mode is active and Windows is installed from UEFI bootable media.

The last case is the most common: everyone who either replaced a new motherboard with BIOS UEFI support, or connected HDDs or SSDs with MBR partitioning for PC assembly. There may also be two options for getting out of the situation:

• refuse from the advantages of UEFI, disable this interface in the BIOS (switch to Legacy) and continue installing Windows on an MBR disk;
• convert it in GPT.

If there is no important data on the hard drive, transformation from MBR to GPT will be carried out automatically Windows installer. To do this, at the stage of choosing the OS installation location, you need to delete all existing partitions.

And as an installation location indicate whole unoccupied space.

You need to complete the Windows reinstallation process, return to the old system and install this program. Or boot up with LiveDisk with AOMEI Partition Assistant included, if you already have access to the old Windows impossible. Program developer - AOMEI company - provides the ability to create emergency bootable media with your products on board. To create such media, you need to use another product of the company - AOMEI PE Builder. Also, AOMEI Partition Assistant, among other software for system engineers, is included in LiveDisk AdminPE.

To convert disk from MBR to GPT, follow the steps as in the screenshots below.

After converting the section style again launch Windows installation.

Convert GPT to MBR

If the question is the opposite - for example, the motherboard do not support BIOS UEFI, but the assembly of components includes an HDD or SSD with GPT partitioning, there will be nothing left but convert it in the MBR. This can be done in the same ways as described above for the reverse process:

• by removal all partitions using the Windows installer, if there is no need for the data stored on the disk;
• by using programs AOMEI Partition Assistant.

To convert a disk from GPT to MBR, follow the same steps as in previous section article, with the only difference that this time we launch, accordingly, the reverse operation.