[Bug 1095142] Re: GRUB2.00 recognizes ext4 as ext2

[Rolf Leggewie]

The title might not accurately describe the problem, but the problem is
nonetheless valid.  I just ran into it.

The issue is not that grub deals with ext4 as ext2, albeit the wording
might be improved in this area (issue 1, minor).  The real problem is
that the grub is again the bitch it's always been.  I'm sorry, but what
exactly was I supposed to do now to get grub installed on this new hard
disk of mine?  Grub won't tell me and neither does google.  That's
CERTAINLY a bug.

** Changed in: grub2 (Ubuntu)
   Importance: Undecided => Medium

** Changed in: grub2 (Ubuntu)
       Status: Invalid => Confirmed

** Summary changed:

- GRUB2.00 recognizes ext4 as ext2
+ GRUB2 installation on GPT partition table unclear

** Summary changed:

- GRUB2 installation on GPT partition table unclear
+ GRUB2 installation with GPT partition table unclear

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Title:
  GRUB2 installation with GPT partition table unclear

Status in “grub2” package in Ubuntu:
  Confirmed

Bug description:
  GRUB2.00 recognizes ext4 as ext2. Extract of the log on
  http://ubuntuforums.org/showpost.php?p=12431947&postcount=17 :

  
  #grub-install -v
  grub-install (GRUB) 2.00-7ubuntu11

  #grub-install --force /dev/sda4
  /usr/sbin/grub-bios-setup: warning: File system `ext2' doesn't support embedding.
  /usr/sbin/grub-bios-setup: 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..
  Installation finished. No error reported.

  #parted -l
  Model: ATA Hitachi HTS54502 (scsi)
  Disk /dev/sda: 250GB
  Sector size (logical/physical): 512B/512B
  Partition Table: gpt

  Number  Start   End    Size    File system     Name                  Flags
  1      20.5kB  210MB  210MB   fat32           EFI System Partition  boot
  2      210MB   193GB  192GB   hfs+            Customer
  3      193GB   193GB  650MB   hfs+            Recovery HD
  4      193GB   203GB  9998MB  ext4            LINUX
  5      203GB   204GB  1073MB  linux-swap(v1)  UBUNTU 2
  6      204GB   250GB  45.7GB  ntfs            BOOTCAMP
                                                      
  Warning: Unable to open /dev/sr0 read-write (Read-only file system).  /dev/sr0
  has been opened read-only.

                                                                            
  Error: /dev/sr0: unrecognised disk label

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