Где хранится файл bcd windows 10

C:\>bcdedit

Windows Boot Manager
--------------------
identifier              {bootmgr}
device                  partition=\Device\HarddiskVolume1
description             Windows Boot Manager
locale                  en-US
inherit                 {globalsettings}
default                 {current}
resumeobject            {ad68f292-2870-11e3-9c80-856fbacd7f33}
displayorder            {current}
toolsdisplayorder       {memdiag}
timeout                 30

Windows Boot Loader
-------------------
identifier              {current}
device                  partition=C:
path                    \Windows\system32\winload.exe
description             Windows 7
locale                  en-US
inherit                 {bootloadersettings}
recoverysequence        {ad68f294-2870-11e3-9c80-856fbacd7f33}
recoveryenabled         Yes
osdevice                partition=C:
systemroot              \Windows
resumeobject            {ad68f292-2870-11e3-9c80-856fbacd7f33}
nx                      OptIn

BCDEDIT - Boot Configuration Data Store Editor

The Bcdedit.exe command-line tool modifies the boot configuration data store.
The boot configuration data store contains boot configuration parameters and
controls how the operating system is booted. These parameters were previously
in the Boot.ini file (in BIOS-based operating systems) or in the nonvolatile
RAM entries (in Extensible Firmware Interface-based operating systems). You can
use Bcdedit.exe to add, delete, edit, and append entries in the boot
configuration data store.

For detailed command and option information, type bcdedit.exe /? <command>. For
example, to display detailed information about the /createstore command, type:

     bcdedit.exe /? /createstore

For an alphabetical list of topics in this help file, run "bcdedit /? TOPICS".

Commands that operate on a store
================================
/createstore    Creates a new and empty boot configuration data store.
/export         Exports the contents of the system store to a file. This file
                can be used later to restore the state of the system store.
/import         Restores the state of the system store using a backup file
                created with the /export command.

Commands that operate on entries in a store
===========================================
/copy           Makes copies of entries in the store.
/create         Creates new entries in the store.
/delete         Deletes entries from the store.

Run bcdedit /? ID for information about identifiers used by these commands.

Commands that operate on entry options
======================================
/deletevalue    Deletes entry options from the store.
/set            Sets entry option values in the store.

Run bcdedit /? TYPES for a list of datatypes used by these commands.
Run bcdedit /? FORMATS for a list of valid data formats.

Commands that control output
============================
/enum           Lists entries in the store.
/v              Command-line option that displays entry identifiers in full,
                rather than using names for well-known identifiers.
                Use /v by itself as a command to display entry identifiers
                in full for the ACTIVE type.

Running "bcdedit" by itself is equivalent to running "bcdedit /enum ACTIVE".

Commands that control the boot manager
======================================
/bootsequence   Sets the one-time boot sequence for the boot manager.
/default        Sets the default entry that the boot manager will use.
/displayorder   Sets the order in which the boot manager displays the
                multiboot menu.
/timeout        Sets the boot manager time-out value.
/toolsdisplayorder  Sets the order in which the boot manager displays
                    the tools menu.

Commands that control Emergency Management Services for a boot application
==========================================================================
/bootems        Enables or disables Emergency Management Services
                for a boot application.
/ems            Enables or disables Emergency Management Services for an
                operating system entry.
/emssettings    Sets the global Emergency Management Services parameters.

Command that control debugging
==============================
/bootdebug      Enables or disables boot debugging for a boot application.
/dbgsettings    Sets the global debugger parameters.
/debug          Enables or disables kernel debugging for an operating system
                entry.

BCDEDIT - Boot Configuration Data Store Editor

The Bcdedit.exe command-line tool modifies the boot configuration data store.
The boot configuration data store contains boot configuration parameters and
controls how the operating system is booted. These parameters were previously
in the Boot.ini file (in BIOS-based operating systems) or in the nonvolatile
RAM entries (in Extensible Firmware Interface-based operating systems). You can
use Bcdedit.exe to add, delete, edit, and append entries in the boot
configuration data store.

For detailed command and option information, type bcdedit.exe /? <command>. For
example, to display detailed information about the /createstore command, type:

     bcdedit.exe /? /createstore

For an alphabetical list of topics in this help file, run "bcdedit /? TOPICS".

Commands that operate on a store
================================
/store          Used to specify a BCD store other than the current system default.
/createstore    Creates a new and empty boot configuration data store.
/export         Exports the contents of the system store to a file. This file
                can be used later to restore the state of the system store.
/import         Restores the state of the system store using a backup file
                created with the /export command.
/sysstore       Sets the system store device (only affects EFI systems, does
                not persist across reboots, and is only used in cases where
                the system store device is ambiguous).

Commands that operate on entries in a store
===========================================
/copy           Makes copies of entries in the store.
/create         Creates new entries in the store.
/delete         Deletes entries from the store.
/mirror         Creates mirror of entries in the store.

Run bcdedit /? ID for information about identifiers used by these commands.

Commands that operate on entry options
======================================
/deletevalue    Deletes entry options from the store.
/set            Sets entry option values in the store.

Run bcdedit /? TYPES for a list of datatypes used by these commands.
Run bcdedit /? FORMATS for a list of valid data formats.

Commands that control output
============================
/enum           Lists entries in the store.
/v              Command-line option that displays entry identifiers in full,
                rather than using names for well-known identifiers.
                Use /v by itself as a command to display entry identifiers
                in full for the ACTIVE type.

Running "bcdedit" by itself is equivalent to running "bcdedit /enum ACTIVE".

Commands that control the boot manager
======================================
/bootsequence   Sets the one-time boot sequence for the boot manager.
/default        Sets the default entry that the boot manager will use.
/displayorder   Sets the order in which the boot manager displays the
                multiboot menu.
/timeout        Sets the boot manager time-out value.
/toolsdisplayorder  Sets the order in which the boot manager displays
                    the tools menu.

Commands that control Emergency Management Services for a boot application
==========================================================================
/bootems        Enables or disables Emergency Management Services
                for a boot application.
/ems            Enables or disables Emergency Management Services for an
                operating system entry.
/emssettings    Sets the global Emergency Management Services parameters.

Command that control debugging
==============================
/bootdebug      Enables or disables boot debugging for a boot application.
/dbgsettings    Sets the global debugger parameters.
/debug          Enables or disables kernel debugging for an operating system
                entry.
/hypervisorsettings  Sets the hypervisor parameters.

Command that control remote event logging
=========================================
/eventsettings  Sets the global remote event logging parameters.
/event          Enables or disables remote event logging for an operating
                system entry.

C:\>bcdedit /export /?

bcdedit /export <filename>

This command exports the contents of the system store into a file.  This file
can be used later to restore the state of the system store.  This command is
only valid for the system store.

<filename>          The filename to be used as the destination for the export.
                    If the filename contains spaces, it must be enclosed in
                    quotation marks ("").

Example:

The following command exports the system store to the specified file:

    bcdedit /export "C:\Data\BCD Backup"

C:\>bcdedit /export "C:\Users\<your user name>\Documents\bcdtemp.bin"
The operation completed successfully.

After examining this backup file in our Documents folder (using HxD), our first reaction was: «Man,
this thing appears to be full of all kinds of needless ‘gunk’!»

It even saves the path and filename to this backup file

,

inside the file
itself

!

Then we compared it to the original BCD file by making a copy of that file while the OS was offline (connected as a slave drive to a
different OS), and found there were MANY differences! So, the ‘backup copy’ is not really a true copy. And the differences go well beyond simply
changing the path name of its location.

So why is this file so ‘cluttered’ compared to the Windows XP boot.ini file? Its first 4 bytes
are a big clue: «regf«. Reason: The BCD file has the same format as a Windows Registry hive! (For example, the NTUSER.DAT
file begins with the same 4 bytes.) And in fact, once a Windows Vista/7/8 OS has actually started booting-up, it loads the BCD file into the Windows Registry
at: HKEY_LOCAL_MACHINE\BCD00000000.

In previous Windows versions, the OS would still boot up this way; even though there was the
possibility some program that used the Disk Signature could then have problems. Note: The same error message, with Status: code of 0xc000000e,
will also be displayed if we change those NT Sig. bytes to all zeros! Only if you edit these bytes back to their original values will the PC boot-up again.

It’s also possible to see such an error if your PC is somehow directed to start booting from a drive other than the normal boot drive, and the BCD
Store on that drive points to the first drive, which will obviously contain a different Disk Sig. than what is stored in that drive’s BCD. Most PC BIOS have
a ‘Boot Menu’ (often accessible using the F12 key at boot-up) which temporarily makes whatever drive you select, be the first drive on the PC, so a
Windows 7, 8.1 or 10 OS on that drive will not have this error! (Note: Unless you plan on always keeping an original Windows OS drive
and a new Windows OS drive

both connected

to your PC, you should never do a new OS install with any other drives connected
to the PC!) Why? Because new Windows OS installs often make changes to a primary disk drive, even when installed to a secondary drive! Disconnect all
but the disk drive you intend to install a new Win OS on, and in the future you will be able to boot-up the new drive all by itself (or using a Boot Menu key)
without it depending upon some primary disk drive you decided to remove, or that has failed.

NOTE: The error shown above is a function of the bootmgr program! We know this, because the same error message will be displayed after
altering the NT Disk Signature on a drive that has had its entire C: Volume (where the actual Windows OS resides) removed! So, the Boot
Manager must check the NT Disk Signature before it even looks for the presence of the C: Volume.

But how does bootmgr know what those hex
bytes should be?

Answer: After examining both our copy and the original BCD file, we found the NT Disk Signature there, in the same
order as found in the MBR Sector, no less than 9 times. For our small test install of a new Windows 7 OS, this shows
where those bytes occurred (highlighted with a pink background color); along with all the other data contained in a BCD Store file.
Note: The \Boot folder of your System Reserved partition will also contain a few LOG files: BCD.LOG, BCD.LOG1 and BCD.LOG2, but the numbered files are often empty. This LOG file is a copy of the BCD file, having the same location
written inside it and all the general indications of a BCD Registry file, but about half its bytes may be different.

To clarify: Under most previous Windows installs, such as Windows 98, people who performed multi-booting or simply had many different partitions on their
PCs often used a program called Partition Magic to shrink or even completely rearrange the layout of partitions on their disk drives. But attempting
to change where the C: Volume begins under Windows 7 results in a similar BLACK screen error as above; including the same exact message: «Info: The boot selection failed because a required device is inaccessible.» But with a different code: «Status: 0xc0000225.«

[Note: This is true whether the correct location
is specified in the Partition Table or not; same Status code will be shown in either case. In fact, we doubt that bootmgr even looks at the
Partition Table, provided it can find the C: volume where it is supposed to be!]

This problem is similar to the one above (concerning the NT
Disk Signature), but involves the exact sector location of the C: drive’s partition.

The reason for the question being: Although we can find our drive’s NT Disk Signature in the BCD Store, we can
not find a sector location for the C: drive! Before searching, we had thought only the
BCD file would need to be updated if we moved the C: Volume. We knew how partitions are referenced in a Windows REGISTRY (see NTFS Disk Signature), but could not find any similar bytes; other than the 4 bytes of the NT Disk Sig., in our BCD file! So how
does bootmgr know where the sector offset location of a C: drive should be, and prevent booting from an OS volume we simply moved and did
not resize; even though the data in both the Partition Table and its Boot Sector (Hidden Sectors which give us sector offset to Boot Sector) have
already been updated?

2. We next carried out the following steps on a copy of our Windows 7 OS install in order to verify our theory about why Windows 7 does this:

    A) Copy the hidden file bootmgr and various folders (including «Boot\enUS» and «Boot\Fonts») from the
«System Reserved» partition to the root directory of the C:\ drive. Note: Five or six files must be ‘skipped’ when doing this, because the
BCD Store (and associated files) will remain in use by the OS (preventing them from being copied)!
    B) Create a copy of the BCD file
in C:\Boot by using this command (as Administrator): bcdedit /export C:\Boot\BCD
    C) Change the
MBR Sector, so the main OS partition is the ‘Active’ partition.

After that we were able to boot-up the OS from only the C: drive. In order to prove
this is true, we used HxD to zero-out the entry in the Partition Table for the System Reserved partition. (Note: The reason we did not
use Windows to ‘delete’ the partition, is because that could have ruined being able to access it again in the future. By saving those hex bytes elsewhere
and zero-filling the entry, we can simply enter those bytes in the table again, in order to restore and access the partition!) Upon rebooting and opening
the Disk Management utility, one can graphically see this is true:

D) We shrank the size of this Volume (C:) to only 8 GB in order to run the next test below.

What about BOOTSTAT.DAT and BOOTSECT.BAK files?

    E) shift the beginning of the C: drive to where the System Reserved partition had been, by correcting the data in both the
Boot Sector (VBR) and the Partition Table; not to mention, actually moving the Boot Sector and its following Volume Boot Record sectors as well