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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 CENTOS

kernel-install

KERNEL-INSTALL(8)						  kernel-install						 KERNEL-INSTALL(8)

NAME

       kernel-install - Add and remove kernel and initramfs images to and from /boot

SYNOPSIS

       kernel-install COMMAND KERNEL-VERSION [KERNEL-IMAGE]

DESCRIPTION

       kernel-install is used to install and remove kernel and initramfs images to and from /boot.

       kernel-install will execute the files located in the directory /usr/lib/kernel/install.d/ and the local administration directory
       /etc/kernel/install.d/. All files are collectively sorted and executed in lexical order, regardless of the directory in which they live.
       However, files with identical filenames replace each other. Files in /etc/kernel/install.d/ take precedence over files with the same name
       in /usr/lib/kernel/install.d/. This can be used to override a system-supplied executables with a local file if needed; a symbolic link in
       /etc/kernel/install.d/ with the same name as an executable in /usr/lib/kernel/install.d/, pointing to /dev/null, disables the executable
       entirely. Executables must have the extension ".install"; other extensions are ignored.

COMMANDS

       The following commands are understood:

       add KERNEL-VERSION KERNEL-IMAGE
	   kernel-install creates the directory /boot/MACHINE-ID/KERNEL-VERSION/ and calls every executable /usr/lib/kernel/install.d/*.install
	   and /etc/kernel/install.d/*.install with the arguments

	       add KERNEL-VERSION /boot/MACHINE-ID/KERNEL-VERSION/

	   The kernel-install plugin 50-depmod.install runs depmod for the KERNEL-VERSION.

	   The kernel-install plugin 90-loaderentry.install copies KERNEL-IMAGE to /boot/MACHINE-ID/KERNEL-VERSION/linux. It also creates a boot
	   loader entry according to the boot loader specification in /boot/loader/entries/MACHINE-ID-KERNEL-VERSION.conf. The title of the entry
	   is the PRETTY_NAME parameter specified in /etc/os-release, or "Linux KERNEL-VERSION", if unset. If the file initrd is found next to the
	   linux file, the initrd will be added to the configuration.

       remove KERNEL-VERSION
	   Calls every executable /usr/lib/kernel/install.d/*.install and /etc/kernel/install.d/*.install with the arguments

	       remove KERNEL-VERSION /boot/MACHINE-ID/KERNEL-VERSION/

	   kernel-install removes the entire directory /boot/MACHINE-ID/KERNEL-VERSION/ afterwards.

	   The kernel-install plugin 90-loaderentry.install removes the file /boot/loader/entries/MACHINE-ID-KERNEL-VERSION.conf.

EXIT STATUS

       If every executable returns with 0, 0 is returned, a non-zero failure code otherwise.

FILES

       /usr/lib/kernel/install.d/*.install /etc/kernel/install.d/*.install
	   Drop-in files which are executed by kernel-install.

       /etc/kernel/cmdline /proc/cmdline
	   The content of the file /etc/kernel/cmdline specifies the kernel command line to use. If that file does not exist, /proc/cmdline is
	   used.

       /etc/machine-id
	   The content of the file specifies the machine identification MACHINE-ID.

       /etc/os-release
	   The content of the file specifies the operating system title PRETTY_NAME.

SEE ALSO

       machine-id(5), os-release(5), Boot loader specification[1]

NOTES

	1. Boot loader specification
	   http://www.freedesktop.org/wiki/Specifications/BootLoaderSpec

systemd 208															 KERNEL-INSTALL(8)
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