W dniu 03.01.2019 o 14:13, Stefan Bethke pisze:
>> I have under supervision a few old servers running 11.2-STABLE. The
>> hardware is almost for retirement, but still in working condition. It's
>> all old Nocona NetBurst microarchitecture. I have recently tried do
>> upgrade OS two of them to 12.0-STABLE, but failed. When I use old
>> bootloader the boot freezes on blue highlighted "Booting" stage, when I
>> tried to use 12 loader, it freezes earlier, on loading kernel modules.
>> The kernel was compiled from fresh sources for CPUTYPE?=nocona.
>> 11.2-STABLE is fine with this optimization and the same kernel boots
>> fine on newer hardware.
>>
>> It is fair, that 11 EOL is expected September 30, 2021 and these servers
>> will likely be retired before this date, but some questions arise:
>>
>> Is such old hardware still supported? Is it possible (how to) debug the
>> booting process?
> The first step is to try with known-good bits: can you boot these machines 
> off the 12.0 ISO or memstick images? Can you load your kernel and modules 
> with the loader from the ISO/memstick? Does GENERIC built without any flags 
> work?
>
> If any of these don’t work, try to be as specific as possible when reporting 
> problems. For example, the exact make of mainboard (kenv output) and the BIOS 
> version, and any relevant BIOS settings are likely important for problems 
> regarding the loader. If the kernel and modules load, you can try a verbose 
> boot to see better how far the kernel gets.
>
> I’d be really surprised if the CPUs themselves would cause trouble.
>
Thank you for the informative reply. I will try to boot from official
CD, but have limited access and servers are still working under FreeBSD
11.2-STABLE #2 r342669



-- 
Marek Zarychta


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