Re: swapping master & slave HDs: dd bs=446
hi ya spamhog ( cute )
On 4 Oct 2004, SpamHog wrote:
> Interesting point: what's in bytes 447 and 448?
- the boot records ( MBR ) is 512 bytes total
- there is only 4 primary partitions ... each is 16 bytes
( 64 bytes is the total number of bytes needed to
( define your primary partitions
( logical boot info is stored elswhere
- a bootable partition ( if it is used/set ) is aa55 ( 2 more bytes )
512 - 64 -2 is 446
to create a bootable without using grub/lilo/syslinux/loadlin...
# dd if=/dev/hda of=/dev/hdc bs=446 sync
where /dev/hda is a working boot disk
where /dev/hdc is a new disk you want to start booting off of
before making /dev/hda go bye-bye