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Help in creating USB Boot

Open Spider84 opened this issue 5 years ago • 6 comments

Hello! Create work! I installed EFI Bootloader to USB flash and OS booted fine from USB flash BUT i need to pres V (Boot Crypt loader from rescue disk). How to chenge it to autoboot?

Spider84 avatar Mar 13 '20 18:03 Spider84

So you don't want to install the Bootloader on the HDD you want it to run from the USB but not show recovery options.

Assuming you have a 64 bit system, to get this behavior: Replace \EFI\Boot\BOOTx64.efi with \EFI\DCS\DcsBoot.efi on the USB Stick.

DavidXanatos avatar Mar 14 '20 08:03 DavidXanatos

Thx for quick answer! As I undestand I need to copy files \EFI\Boot\Microsoft partition from HDD to USB too. After this I can remove EFI partition from HDD....

Spider84 avatar Mar 14 '20 10:03 Spider84

No, the UEFI bootloader looks for the windows boot manager on the drives it finds an encrypted partition on.

DavidXanatos avatar Mar 15 '20 06:03 DavidXanatos

Yes. I already found this algorithm in source code. Now I encoded EFI and system partitions and all work fine, but was needed to rebuild Microsoft\Boot\BCD by bcdbuild.exe I plan to write step by step manual - at first for myself, second for all others :)

Spider84 avatar Mar 16 '20 03:03 Spider84

Cool :-)

DavidXanatos avatar Mar 18 '20 14:03 DavidXanatos

How about reaching out to https://www.hirensbootcd.org/ so they can include it on their builds? I've already used it to fix bootloader after Windows update, but since you can't start without rebooting I cheated by removing an usb drive and mounting it again, after that Diskcryptor stops asking for a reboot. But using it like this limit uses (I can't decrypt an harddisk).

YyYy-YyY avatar Apr 27 '20 19:04 YyYy-YyY