On 29-06-2020 17:53, Hendrik Boom wrote:
> On Mon, Jun 29, 2020 at 05:24:57PM +0200, dng@??? wrote:
>> On 29-06-2020 17:13, Hendrik Boom wrote:
>>> On Mon, Jun 29, 2020 at 12:44:05PM +0000, dal wrote:
>>>>> From: Dng [mailto:dng-bounces@lists.dyne.org] On Behalf Of Hendrik Boom
>>>>> Sent: den 29 juni 2020 14:18
>>>>> What I want to know is:
>>>>> What determines which disks' MBRs get written to during a
>>>>> normal kernel upgrade initiated by aptitude.
>>>> A normal kernel upgrade does not, nor needs to rewrite MBRs.
>>> Grub stage 1 resides within 446 bytes of the MBR.
>>> Grub stage 1.5 resides in the spae between the MBR and the first partition.
>>> Grub stage 2 resides in the /boot within a partition.
>>>
>>> It's entirely plausible that some of stage 1 and stage 1.5 may need changes.
>>>
>>> In any case, the last upgrade I did tried to write in the space between
>>> the MBR and the first partition of on of my hard drives.
>>>
>>> I'd like it to stop trying that, letting it write to my other drives and
>>> never boot from this one again, which I plan to remove when I find my
>>> screwdriver.
>>>
>>> -- hendrik
>>>
>>>> /D
>>>>
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>> According to grub documentation you can make grub-mkconfig skip a drive
>> with one of these options in /etc/default/grub
>>
>> 'GRUB_DISABLE_OS_PROBER'
>> Normally, 'grub-mkconfig' will try to use the external 'os-prober'
>> program, if installed, to discover other operating systems
>> installed on the same system and generate appropriate menu entries
>> for them. Set this option to 'true' to disable this.
>>
>> 'GRUB_OS_PROBER_SKIP_LIST'
>> List of space-separated FS UUIDs of filesystems to be ignored from
>> os-prober output. For efi chainloaders it's <UUID>@<EFI FILE>
> That tells it to ignore particular partitions. My partitions are fine,
> I have problems with the first few sectors of one hard drive containing
> the first few stages of the boot process before it even looks at a
> partition. These sectors are not in a partition. I want it to ignore
> that entire *drive*, not a partition.
>
> -- hendrik
The first option disables the check of drives for the presence of
(other) filesystems. The second has indeed to do with partitions only
and you can ignore that one.
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Re: [DNG] Configuration of boot dri…
