Where is bcd file located

DAT file begins with the same 4 bytes. To test this, we used a disk editor to alter the bytes at offsets 0x 1B8 through 0x 1BB in the MBR first sector of the disk drive by simply adding 1 to each byte. 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 0x ce , will also be displayed if we change those NT Sig.

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.

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!

But how does bootmgr know what those hex bytes should be? 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. LOG2, but the numbered files are often empty. 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.

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! Before searching, we had thought only the BCD file would need to be updated if we moved the C: Volume. 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?

NOTE: All of the following is still under construction. After attempting to boot-up the drive again, the same error message is displayed, no matter how many times we used the DVD to 'repair' the drive!!. Asked 4 years, 2 months ago. Active 1 year, 5 months ago. Viewed 38k times. They are editing the so-called "BCD Store".

Where is it located physically? In filesystem where? On physical harddrive sectors where? On Flash ROM of computer? Somewhere else where? Improve this question.

FastEthernet 4, 3 3 gold badges 24 24 silver badges 30 30 bronze badges. Dims Dims Add a comment. Active Oldest Votes. Where is the BCD file located in the registry? EFI—based operating systems. Note The file name and extension you use are not significant. If your system is Windows 7, FixBoot will write a Windows 7-compatible boot sector and so on. ScanOs will also print installations that are not currently in the BCD. Finally, you can use the built-in msconfig tool to change the boot timeout.

On the boot tab, select the desired entry in the list and click the button Set as default. Click the Apply and OK buttons and you are done. Skip to content Android Windows Linux Apple.

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