I have just installed ubuntu 16.04 on a macbook pro 7.1. I was having some difficulties, but eventually got it to work.
Based on my original difficulties pertaining to the video card (see here: Problem installing 16.04 on Mac: Created BIOS boot partition), i have found another problem with the GPT table.
When I run gparted on from a live USB i get the following error: "The primary GPT table is corrupt, but the backup appears OK, so that will be used"
I was told in the last thread that this was a problem that i had to fix. So I downloaded gdisk. However when I run that from within OSX i don't see any errors. Also running gparted from within the ubuntu install does not give the error.
gdisk /dev/disk0
gives:
GPT fdisk (gdisk) version 1.0.1
Warning: Devices opened with shared lock will not have their
partition table automatically reloaded!
Partition table scan:
MBR: hybrid
BSD: not present
APM: not present
GPT: present
Found valid GPT with hybrid MBR; using GPT.
p command gives:
Disk /dev/disk0: 488397168 sectors, 232.9 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 00000B5C-4C91-0000-C021-000078700000
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 488397134
Partitions will be aligned on 8-sector boundaries
Total free space is 2293 sectors (1.1 MiB)
Number Start (sector) End (sector) Size Code Name
1 40 409639 200.0 MiB EF00 EFI system partition
2 409640 458838111 218.6 GiB AF00 Customer
3 458840064 480540671 10.3 GiB 8300
4 480540672 488396799 3.7 GiB 8200
v command gives:
No problems found. 2293 free sectors (1.1 MiB) available in 3
segments, the largest of which is 1952 (976.0 KiB) in size.
Also when I run gparted from within the ubuntu install (i.e. not from the live USB) no errors appear.
So what i am trying to work out is why i get errors when i run gparted from the live instance, and whether this is a cause for concern given that no problems appear when running gparted from the install and goven that gdisk finds no errors.
All help is much appreciated.
