grub-install: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub-install: info: scanning hostdisk//dev/sda for LDM.
grub-install: info: no LDM signature found.
grub-install: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub-install: info: no LVM signature found.
grub-install: info: Partition 0 starts from 2048.
grub-install: info: Partition 5 starts from 2048000.
grub-install: info: drive = 0.
grub-install: info: the size of hostdisk//dev/sda is 488397168.
grub-install: info: guessed root_dev `hostdisk//dev/sda' from dir `/boot/grub/i386-pc'.
grub-install: info: setting the root device to `hostdisk//dev/sda,gpt6'.
grub-install: warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible.
grub-install: warning: Embedding is not possible.  GRUB can only be installed in this setup by using blocklists.  However, blocklists are UNRELIABLE and their use is discouraged..
grub-install: error: will not proceed with blocklists.