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Full Discussion: How to have bootable backup?
Top Forums UNIX for Dummies Questions & Answers How to have bootable backup? Post 302078896 by grumpf on Wednesday 5th of July 2006 09:29:32 AM
Old 07-05-2006
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.
but recreating the filesystem by hand an using rsync afterwards is easy.

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.

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).
 

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GRUB-BIOS-SETUP(3)					     Library Functions Manual						GRUB-BIOS-SETUP(3)

NAME
grub-bios-setup -- Set up images to boot from a device. SYNOPSIS
grub-bios-setup [-a | --allow-floppy] [-b | --boot-image=FILE] [-c | --core-image=FILE] [-d | --directory=DIR] [-f | --force] [-m | --device-map=FILE] [-s | --skip-fs-probe] [-v | --verbose] DEVICE DESCRIPTION
You should not normally run this program directly. Use grub-install instead. OPTIONS
--allow-floppy Make the device also bootable as a floppy. This option is the default for /dev/fdX devices. Some BIOSes will not boot images cre- ated with this option. --boot-image=FILE Use FILE as the boot image. The default value is boot.img. --core-image=FILE Use FILE as ther core image. The default value is core.img. --directory=DIR Use GRUB files in the directory DIR. The default value is /boot/grub. --force Install even if problems are detected. --device-map=FILE Use FILE as the device map. The default value is /boot/grub/device.map . --skip-fs-probe Do not probe DEVICE for filesystems. --verbose Print verbose messages. SEE ALSO
info grub Wed Feb 26 2014 GRUB-BIOS-SETUP(3)
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