Re: Future of installing GRUB to LVM volumes (and loop devices)

[Andrei Borzenkov]

On Fri, May 15, 2015 at 12:28 PM, Sebastian Pipping
<address@hidden> wrote:
>
> I understand that some relations may be hard to impossible to detect.
> The cases that I have are plain parent-child relations, though.
> It would rock the house to get these cases covered again.
>
> (On a side note, text "unknown device type loop0" looks like a bug to me
> since "loop0" is not a type.)
>

It comes from Open Firmware part. May be it should be downgraded to
Info. But as long as it happens in grub-probe only it is OK.

>
>>>> Half working solution would be to assume that it is always child map.
>>>>
>>>> Or you can take shortcut and assume that /dev/mapper/XXXXpY is
>>>> partition of /dev/mapper/XXX but you still will need to verify it.
>>>>
>>>> Patches are welcome.
>>>
>>> I am still wondering: how come it was working in GRUB 2.00 but now
>>> longer is?
>>>
>>
>> But by you said in previous message that HEAD works? Not sure how
>> though :)
>
> That referred to the '(hd0)'-parameter-with-device-map case, only.
>
> This patch to grml-debootstrap says best what has stopped working:
> https://github.com/hartwork/grml-debootstrap/commit/a705ff45c2d053b0d90ec51700e2d25a760106f3
>

Could you please describe your exact configuration that does not work
(including all devices and their relationships) and what does not
work? Sorry if you did it already but I somehow lost track here.