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[Bug 1017761] [yast2/bootloader]: Make it possible to save the bootloader to different disks for redundancy
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Tue, 03 Jan 2017 11:39:06 +0000
  • Message-id: <bug-1017761-21960-QutPhOabje@http.bugzilla.suse.com/>
http://bugzilla.suse.com/show_bug.cgi?id=1017761
http://bugzilla.suse.com/show_bug.cgi?id=1017761#c2

Josef Reidinger <jreidinger@xxxxxxxx> changed:

What |Removed |Added
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CC| |jreidinger@xxxxxxxx,
| |richard.bos@xxxxxxxxx
Flags| |needinfo?(richard.bos@xs4al
| |l.nl)

--- Comment #2 from Josef Reidinger <jreidinger@xxxxxxxx> ---
well, we already have support for boot with redundancy. If as boot device is
selected mbr and "/boot" is on md raid, then it will write to both devices.

But it never work so reliable with software raid, as problem is that in MBR is
only 512 bytes, so disk order and partition number is hardcoded there. So both
partition have to have same number and also same starting cylinder. Also it
have problem when disk is there and just report some error, as it mean that
boot code still point to that disk and can fail. So in that case disk have to
be manually disabled.

So this feature is already there, but it is never trivial recovery and hardware
raid works always more reliable.

If this do not work for you, please attach logs, so I can see why it do not
work for you as it should be default install to both locations.

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