---- "Trent W. Buck" <trentbuck@gmail.com> wrote:
Russell Coker <russell@coker.com.au> writes:
On Wed, 23 Apr 2014 16:13:13 Craig Sanders wrote:
dd would perform an exact byte-by-byte duplicate of the *entire* disk *every* single time you performed the backup. rsync only backs up the files that have changed since the last backup.
One thing that DD is good for is the boot loader.
You wouldn't need to backup the bootloader if you used syslinux. It's mbr.bin is static and dumb and the same everywhere. The only smarts are in the PBR and ./ldlinux.sys (which is chattr -i on ext, and completely hidden on btrfs).
It makes life much easier when a stupid installer hoses the MBR, because instead of booting a live CD and hoping the CD has a similar enough version of grub and then doing grub-install or whatever, you just
cat mbr.bin >/dev/sda
Or boot off a liveCD mount your filesystem and chroot into your filesystem to reinstall your grub. I have had to do this more than once, when trying out stupid installers. cheers Robert
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