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Full Discussion: How to copy MBR from old harddrive to new harddrive?
Top Forums UNIX for Dummies Questions & Answers How to copy MBR from old harddrive to new harddrive? Post 97659 by mahendramahendr on Wednesday 1st of February 2006 10:45:20 AM
Old 02-01-2006
if it is for unix or linux :

Copy just the MBR and boot sector of a hard dirve to another hard drive image:

dd if=/dev/hda of=/dev/hdb bs=512 count=2

Copy MBR only of a hard drive:

dd if=/dev/hda of=/dev/hdb bs=446 count=1

otherwise you can create a file of MBR image and later you can copy back to the hard drive.

Check the hard drive names in your machine....

If it is for windows, you have lot of tool available here :

http://www.geocities.com/thestarman3...tToolsRefs.htm
 

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LEARN ABOUT FREEBSD

uefi

UEFI(8) 						    BSD System Manager's Manual 						   UEFI(8)

NAME

     UEFI -- Unified Extensible Firmware Interface bootstrapping procedures

DESCRIPTION

     The UEFI Unified Extensible Firmware Interface provides boot- and run-time services to operating systems.	UEFI is a replacement for the
     legacy BIOS on the i386 and amd64 CPU architectures, and is also used on arm64 and ia64.

     The UEFI boot process loads system bootstrap code located in an EFI System Partition (ESP).  The ESP is a GPT or MBR partition with a spe-
     cific identifier that contains an msdosfs(5) FAT file system with a specified file hierarchy.

	   Partition Scheme    ESP Identifier
	   GPT		       C12A7328-F81F-11D2-BA4B-00A0C93EC93B
	   MBR		       0xEF

     The UEFI boot process proceeds as follows:
	   1.	UEFI firmware runs at power up and searches for an OS loader in the EFI system partition.  The path to the loader may be set by an
		EFI environment variable.  If not set, the default is /EFI/BOOT/BOOTX64.EFI.  The default UEFI boot configuration for FreeBSD
		installs boot1.efi as /EFI/BOOT/BOOTX64.EFI.
	   2.	boot1.efi locates the first partition with the type freebsd-ufs, and from it loads loader.efi.
	   3.	loader.efi loads and boots the kernel, as described in loader(8).

     The vt(4) system console is automatically selected when booting via UEFI.

FILES

     /boot/boot1.efi
		   First stage UEFI bootstrap
     /boot/boot1.efifat
		   msdosfs(5) FAT file system image containing boot1.efi for use by bsdinstall(8) and the bootcode argument to gpart(8).
     /boot/loader.efi
		   Final stage bootstrap
     /boot/kernel/kernel
		   default kernel
     /boot/kernel.old/kernel
		   typical non-default kernel (optional)

SEE ALSO

     vt(4), msdosfs(5), boot(8), gpart(8)

HISTORY

     UEFI boot support first appeared in FreeBSD 10.1.

AUTHORS

     UEFI boot support was developed by Benno Rice <benno@FreeBSD.org>, Ed Maste <emaste@FreeBSD.org>, and Nathan Whitehorn
     <nwhitehorn@FreeBSD.org>.	The FreeBSD Foundation sponsored portions of the work.

CAVEATS

     EFI environment variables are not supported by loader(8) or the kernel.

     boot1.efi loads loader.efi from the first FreeBSD-UFS file system it locates, even if it is on a different disk.

     boot1.efi cannot load loader.efi from a ZFS(8) file system.  As a result, UEFI does not support a typical root file system on ZFS configura-
     tion.

BSD
								 October 17, 2014							       BSD
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