gmirror failed with error 19.

[Andrey V. Elsukov]

On 16.10.2011 20:20, Lev Serebryakov wrote:
>>>> I hope this will not change.
>> Yes, it works as you have described.
>   As we can see, it doesn't work as described for some users. And,
> again, think about picking up GPT from mirror component, as reported
> by many others.

As i see many users complains about their incorrect configurations and
misunderstanding of generic things.

1. GPT might work with any GEOM classes and it does work.
2. Yes, you can see some gptboot' and kernel's complains but they are
not fatal. Part of they are just because GEOM design.

How our booting process works:
1. BIOS calls PMBR.
2. PMBR loads primary GPT and gptboot
3. gptboot/gptzfsboot verifies primary and backup GPT.
It can complain about invalid backup header when some GEOM classes had
saved metadata in the last sector. But it will work with primary table.
4. The kernel detects GPT on each provider where it can be found. And it
will complain that backup GPT header is not in the last LBA for disk
providers, but it will detect VALID GPT on gmirror's provider. And it
will work with any of them.

>> Can you give an example which motherboard does not work?
>   No. But any EFI-bases or Hybrid BIOS (with traditional BIOS, but
> 2Tb+ HDD and GPT support from EFI) could be surprised.

Actually, i do not know how you will boot your system without legacy
PMBR-way. Our EFI support seems is not finished for the x86/x64.

-- 
WBR, Andrey V. Elsukov

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