On Wednesday 20 May 2015 13:55:27 Neil Bothwick wrote: > On Wed, 20 May 2015 08:21:34 -0400, [email protected] wrote: > > > If you want to be able to use UEFI, you need to use GPT. UEFI needs a > > > FAT partition at the start of the drive, type FE00, but booting a GPT > > > disk with MBR requires a small BIOS boot partition, type EF02, at the > > > start of the drive (mine is 1MB). > > > > > > For ease of switching to UEFI later, I'd do > > > > > > sda1 1MB BIOS boot, type EF00 > > > sda2 /boot, type 8300 > > > everything else. > > > > > > You can make sda2 ext2, then, when it is time to switch, simply backup > > > the contents of /boot, replace sda1 and sda2 with a single EF00 > > > partition, formatted with FAT, and copy the contents of /boot back. > > > > Thanks, does the 1mb partition have to have anything in it? > > No. If doesn't even need a filesystem, just create the partition with the > correct type and GRUB will work.
From what I recall gdisk just starts at sector 2048, doesn't this leave space for MBR code? Note the message "MBR: protective" below: # gdisk /dev/sda GPT fdisk (gdisk) version 0.8.10 Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using GPT. Command (? for help): p Disk /dev/sda: 468862128 sectors, 223.6 GiB Logical sector size: 512 bytes Disk identifier (GUID): E682BFC8-0C85-459B-BA14-87F4E68CD711 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 468862094 Partitions will be aligned on 2048-sector boundaries Total free space is 27368557 sectors (13.1 GiB) Number Start (sector) End (sector) Size Code Name 1 2048 1093631 533.0 MiB EF00 ESP 2 1093632 43036671 20.0 GiB 8300 root 3 43036672 441495551 190.0 GiB 8300 home -- Regards, Mick
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