Christian Seiler a écrit : > > Well sure, but MBR also has all the CHS baggage - and while it isn't > used anymore on modern systems, there still is the de-factor standard > of aligning the first partition with the first CHS-sector that is so > ingrained historically that the gap between MBR and the first > partition is something that may be relied on.
Even in the MBR/MSDOS partition table scheme, the alignment is not based on CHS pseudo-geometry any more. > Or to put it differently: because of the CHS baggage of MBR, there > is software that wouldn't support it if the first partition wasn't > aligned; Only very old software. > for compatibility reasons every tool that manipulates MBR > partitions will therefore want to leave a gap after the MBR. Current tools won't align for compatibility purpose any more. The default 1-MiB alignment is only for performance purpose, not compatibility. > So yes, my statement was an oversimplification - but it is not > unreasonable to have a gapless disk with GPT - hence the > explanation why grub doesn't use this gap anymore. (Because you > could also create a partition there afterwards.) Or grow the partition table and overwrite the gap. >>> At least Jessie's d-i appears to only be able to create MBR >>> partition tables >> That's wrong. I have created GPT partition tables with Wheezy's >> installer. IIRC, it creates a GPT partition table by default when booted >> in EFI mode. > > I didn't try EFI mode recently. But in legacy BIOS mode, I've found > no option of making the installer create a GPT table - I actually > had to use a shell to do it manually. (If there is an option, it's > *too* well hidden.) Maybe you have to select "expert install" at the boot menu.
