Bug#788898: grub2-common: Jessie install on 4TB disk fails to reboot

[James Bottomley]

Package: grub2-common
Version: 2.02~beta2-23
Severity: important
usertags: debian-boot at lists.debian.org

Doing a fresh install of Jessie netinst on factory brand new 4TB disk
failed to reboot.  The system completely refuses to boot after the usb
key is removed.  The problem, as it turns out on my system, is that
nothing in the install process set the boot flag in the protected master
boot record and without that, the system refuses to boot the disk.

Fixing it up with parted disk_set pmbr_boot on was simple enough (after
about an hour of trying to work out what the problem was), but it will
appear to be an install failure to most users.

Most modern motherboards will recognise a GPT label partition table and
boot it regardless of the state of the protected master boot record boot
flag, but for the benefit of those which don't, the debian installer
should set this flag on all disks.