[Bug 46223] Re: update-grub doesn't work correctly with raid partitions

[Thomas Hotz]

** Summary changed:

- [DAPPER] update-grub doesn't work correctly with raid partitions
+ update-grub doesn't work correctly with raid partitions

** Changed in: grub (Ubuntu)
       Status: Confirmed => Incomplete

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Title:
  update-grub doesn't work correctly with raid partitions

Status in “grub” package in Ubuntu:
  Incomplete

Bug description:
  Hi,

  this is my /etc/fstab

  /dev/md0        /               ext3    defaults,errors=remount-ro 0       1
  /dev/md2        /home           reiserfs defaults        0       2

  and this is fdisk -l

  Disk /dev/sda: 163.9 GB, 163927522816 bytes
  255 heads, 63 sectors/track, 19929 cylinders
  Units = cilindri of 16065 * 512 = 8225280 bytes

  Dispositivo Boot      Start         End      Blocks   Id  System
  /dev/sda1   *           1        4863    39062016    7  HPFS/NTFS
  /dev/sda2            4864       19929   121017645    5  Esteso
  /dev/sda5   *        4864        7295    19535008+  fd  Autorilevamento raid di Linux
  /dev/sda6            7296        7441     1172713+  fd  Autorilevamento raid di Linux
  /dev/sda7            7442       19929   100309828+  fd  Autorilevamento raid di Linux

  Disk /dev/sdb: 163.9 GB, 163927522816 bytes
  255 heads, 63 sectors/track, 19929 cylinders
  Units = cilindri of 16065 * 512 = 8225280 bytes

  Dispositivo Boot      Start         End      Blocks   Id  System
  /dev/sdb1   *           1        4863    39062016    7  HPFS/NTFS
  /dev/sdb2            4864       19929   121017645    5  Esteso
  /dev/sdb5   *        4864        7295    19535008+  fd  Autorilevamento raid di Linux
  /dev/sdb6            7296        7441     1172713+  fd  Autorilevamento raid di Linux
  /dev/sdb7            7442       19929   100309828+  fd  Autorilevamento raid di Linux

  
  This is my cat /proc/mdstat
  Personalities : [raid0] [raid1]
  md2 : active raid1 sda7[0] sdb7[1]
        100309760 blocks [2/2] [UU]

  md1 : active raid0 sda6[0] sdb6[1]
        2345216 blocks 64k chunks

  md0 : active raid1 sda5[0] sdb5[1]
        19534912 blocks [2/2] [UU]

  
  On sda1 I' ve windows, so the Ubuntu root / is md0, raid1 with sda5 and sdb5.

  When I do an update-grub. I have in /boot/grub/menu.lst:

  title           Ubuntu, kernel 2.6.15-23-686
  root            (hd0,0)
  kernel          /boot/vmlinuz-2.6.15-23-686 root=/dev/md0 ro quiet splash
  initrd          /boot/initrd.img-2.6.15-23-686

  
  So update-grub writes root (hd0,0), but the correct value should be (hd0,4),  because sda1 is a NTFS partition with windows... Why does it write (hd0,0) ?

  Regards

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