Problem with GPT and a 12TB RAID-5 partition

[Michael Tautschnig]

Hi Garb,

Sorry for following up as late as that. First of all, using gpt-bios is indeed
the proposed way to go, and hacking a bios_grub flag somehow into your config
really is a *hack*, because this is exactly what gpt-bios is supposed to take
care of.

> Hi again,
> 
> here is some more information:
> I now could run "gdisk -l /dev/sda" on the Ubuntu 10.04, which I installed
> with fai and which is not booting:
> 
> ----------------------------------------------------------------------
> GPT fdisk (gdisk) version 0.5.1
> 
> Partition table scan:
>   MBR: protective
>   BSD: not present
>   APM: not present
>   GPT: present
> 
> Found valid GPT with protective MBR; using GPT.
> Disk /dev/sda: 23437369344 sectors, 10.9 TiB
> Disk identifier (GUID): EF622145-AA15-406D-924E-EF9D566D5CF3
> Partition table holds up to 128 entries
> First usable sector is 34, last usable sector is 23437369310
> Total free space is 29 sectors (14.5 KiB)
> 
> Number  Start (sector)    End (sector)  Size       Code  Name
>    1              63          409662   200.0 MiB   0700  primary
>    2          409663         8798270   4.0 GiB     8200  primary
>    3         8798271     23437369070   10.9 TiB    0700  primary
>    4     23437369071     23437369310   120.0 KiB   EF02  primary
> ----------------------------------------------------------------------
> 
> There are a /boot-Partition on 1, a swap-Partiton on 2 and a /-partition on
> 3 with 11TByte. The fourth partition was added by setup-storage because of
> the "gpt-bios" disclabel. Unlike the partition table generated by the Ubuntu
> Installer-CD, the free space is only 29 sectors, the bios-partition is at
> the end and its size is smaller.
> 

[...]

Most probably you're the first one using gpt-bios, as nobody ever reported back
on that feature. Those problems therefore don't come that unexpected, but I'll
happily try to get them resolved. I have now added a patch to our experimental
builds which moves the partition to the front and makes it 1MB in size.

Could you please give those new packages a try? It's version
4.0~beta2+experimental3. You can obtain the experimental packages as described
at

http://faiwiki.informatik.uni-koeln.de/index.php/Main_Page#getting_FAI

Thanks in advance,
Michael

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