Re: GPT on BIOS system partitions scheme
yudi v (yudi.tux@gmail.com on 2011-10-16 15:20 +1000):
> Could someone using GPT on a BIOS system confirm if I got the GPT
> partitioning right on a BIOS system
>
[..]
> Partition table scan:
> MBR: protective
> BSD: not present
> APM: not present
> GPT: present
>
> Found valid GPT with protective MBR; using GPT.
So far so good...
> Partitions will be aligned on 2048-sector boundaries
This is not necessary. Menu X, D will allow you to change this to 1.
The 2048 value is just wasteful (an overly safe default). Whether you
care about losing that 2MB is your call...
> Total free space is 1058782 sectors (517.0 MiB)
>
> Number Start (sector) End (sector) Size Code Name
> 1 2048 411647 200.0 MiB EF00 EFI System
> 2 675840 677887 1024.0 KiB EF02 BIOS boot
> 3 942080 3039231 1024.0 MiB 0700 Linux/Windows
> 4 3303424 1464884942 696.9 GiB 8E00 Linux LVM
Looks great. Do you really need partition 1? If it's a BIOS system, the
first partition has no purpose.
> *Partition3 will be used for /boot
> partition4 - LVM over LUKS
Do you really need 1G for /boot? 100MB is already overkill on most
systems, maybe if you plan to do kernel development...
> Used Fdisk to mark the first partition as boot.
>
> root@ubuntu:/home/ubuntu# fdisk /dev/sda
>
> WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util
> fdisk doesn't support GPT. Use GNU Parted.
Did you notice the warning? GPT partitions can't be marked active, and
even if they could -- grub doesn't use the active marker, not even on
an MBR disk.
Your partitioning is fine. It's not optimal, but it will work as it
should. Just remember to install grub2 on the whole disk (/dev/sda),
not in a partition.
Regards,
Arno
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