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Full Discussion: How to have bootable backup?
Top Forums UNIX for Dummies Questions & Answers How to have bootable backup? Post 302078916 by siegfried on Wednesday 5th of July 2006 11:19:03 AM
Old 07-05-2006
rsync creates master boot records?
Quote:
Originally Posted by grumpf
You wnat a backup ? rsync is fine no need for cp. exspecial not on the disklevel since this is a real problem when the disk are not totaly equal. i would use dd at least.
So if I have a new emtpy disk rsync will correctly create two boot partitions: one for windows and one for Fed Core 4? Wow! I thought I needed cp for that. I presently use it for that.


Quote:
Originally Posted by grumpf
but recreating the filesystem by hand an using rsync afterwards is easy.
Could you elaborate further?

Quote:
Originally Posted by grumpf
What exactly is is a bootable disk for you ? what do you exspect when a disk fails ?
so far i know most systems wait until manual intervention if boot fails. a filesystemcopy
may be good enought i most cases.
cp presently creates a bootable disk for me presently: I can boot windows or fed core 4. Remember I'm doing a "telinit 1" and I'm performing a vertbatim block level copy by specifying /dev/sda. This ignores any filesystems hence it copies the master boot records, all my grub stuff and my windows paritition.

Quote:
Originally Posted by grumpf
Simply prepare a cdrom/floppy/usbstick/... with a bootloder an a menu that is ready to start from the backup disk. (normal pc-bios is very crappy when it comes to such tasks).
I'm already using grub and I assume I can enhance it's boot menu. Is there any reason to move grub from my internal disks to a USB stick or floppy?

Thanks,
Siegfried
 

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LEARN ABOUT LINUX

grub-install

GRUB-INSTALL(8) 					  System Administration Utilities					   GRUB-INSTALL(8)

NAME

       grub-install - install GRUB to a device

SYNOPSIS

       grub-install [OPTION] install_device

DESCRIPTION

       Install GRUB on your drive.

       -h, --help
	      print this message and exit

       -v, --version
	      print the version information and exit

       --modules=MODULES
	      pre-load specified modules MODULES

       --boot-directory=DIR
	      install GRUB images under the directory DIR/grub instead of the /boot/grub directory

       --grub-setup=FILE
	      use FILE as grub-setup

       --grub-mkimage=FILE
	      use FILE as grub-mkimage

       --grub-mkrelpath=FILE
	      use FILE as grub-mkrelpath

       --grub-mkdevicemap=FILE use FILE as grub-mkdevicemap

       --grub-probe=FILE
	      use FILE as grub-probe

       --no-floppy
	      do not probe any floppy drive

       --allow-floppy
	      Make the drive also bootable as floppy (default for fdX devices). May break on some BIOSes.

       --recheck
	      probe a device map even if it already exists

       --force
	      install even if problems are detected

       --disk-module=MODULE
	      disk module to use

       INSTALL_DEVICE can be a GRUB device name or a system device filename.

       grub-install copies GRUB images into /boot/grub, and uses grub-setup to install grub into the boot sector.

REPORTING BUGS

       Report bugs to <bug-grub@gnu.org>.

SEE ALSO

       grub-mkconfig(8), grub-mkimage(1), grub-setup(8), grub-mkrescue(1)

       The full documentation for grub-install is maintained as a Texinfo manual.  If the info and grub-install programs are properly installed at
       your site, the command

	      info grub-install

       should give you access to the complete manual.

grub-install (GRUB) 1.99-12ubuntu5				   October 2011 						   GRUB-INSTALL(8)
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