Re: Problem when installing stretch with btrfs
On Wed, Sep 20, 2017 at 06:04:16PM +0200, Pierre Couderc wrote:
> Mmm, why ? is legacy mode a problem ?
Well depends what you want to do. Generally legacy mode requires the
disk be partitioned in DOS style partitions (MBR) which has a limit of
2TB disks, while UEFI requires GPT which does not have that limit.
Also you are limited to 4 primary partitions with MBR, while GPT allows
128 partitionts. You can get past the 4 primary limit with extended
partitions, but they are a hassle sometimes.
UEFI booting is probably more future proof if you want to be able to
move a disk to another system later, although at the same time MBR is
more legacy machine compatible.
UEFI does not support installing the boot loader on a software raid
partition and having it work as simply as MBR did with grub. It has to
be a plain partition on the disk of the type ESP with FAT32 or other
compatible filesystem, which is a bit annoying. It might be possible
to do a software raid partition for that if you pick the type that has
the meta data at the end (but that is not the default), since then it
would still look like a normal disk to the firmware.
> > Usually the boot menu will list the same USB key twice. Once for UEFI
> > boot and once for legacy boot.
> >
> In fact my boot asks me nothing...(Asus P8H67_M_LE board)
Well to get a boot menu you usually have to hit F8 or F12 or something.
Default boot could be anything.
--
Len Sorensen
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