Thread: This GPT partition label has no BIOS Boot Partition

hello,

when installed ubuntu on system (a year or ago) forgot add bios boot partition. of problem considering partition type 2tb drive gpt. hence, whenever grub updated warning:

code:

/usr/sbin/grub-setup: warn: gpt partition label has no bios boot partition; embedding won't possible!.  /usr/sbin/grub-setup: warn: embedding not possible.  grub can installed in setup using blocklists.  however, blocklists unreliable , use discouraged..  installation finished. no error reported.

clearly need address. looking @ partition table:

code:

freddie@bromine:~$ sudo parted /dev/sda unit s print  model: ata wdc wd20ears-00j (scsi)  disk /dev/sda  sector size (logical/physical): 512b/512b  partition table: gpt    number  start     end          size         file system     name  flags   1      2048s     499711s      497664s      ext2                  boot   2      499712s   2453503s     1953792s     linux-swap(v1)   3      2453504s  3907028991s  3904575488s                        lvm

i notice there around ~1mib of space @ start of drive (unused due potential alignment issues). hence, wondering if can create partition in empty space @ start of drive , use grubs stuff.

if so, rough sequence of commands create partition (without disturbing there) , setting bios boot partition.

regards, freddie.

i not see why gpt cannot create partition starting @ sector 40. created gpt on small drive test while before rounding 8s mine starts @ sector 34.

srs5694's show 8 sector alignment post #9
http://ubuntuforums.org/showthread.php?t=1685666

code:

$ sudo parted /dev/sda unit s print model: ata wdc wd10ears-00y (scsi) disk /dev/sda: 1953525168s sector size (logical/physical): 512b/512b partition table: gpt  number  start     end          size         file system  name                  flags  1      40s       439s         400s                      bios boot partition   bios_grub

gpt fdisk tutorial -srs5694 in forums
http://ubuntuforums.org/showthread.php?t=1439794
http://www.rodsbooks.com/gdisk/

see gdisk walk thru create new partition starting @ sector 40 , ending @ 2040 or whatever.

however, in gpt setup, there no space following 512-byte mbr embedding "second stage" core.img. thus, must make separate "bios boot partition" hold core.img. can set bios_grub flag in gparted or command line: in gpt fdisk (gdisk), give type code of ef02.
sudo parted /dev/sda set <partition_number> bios_grub on

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