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Old 04-26-2012, 09:33 PM   #1
kamuz
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Registered: Nov 2003
Posts: 4

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Installed a new drive for my Software RAID1 in Linux but I cannot install grub on it


Hello everyone,

I am using Ubuntu 8.04 (32bit) and I am running a RAID1 array (sda,sdb).
Anyway, I replaced /dev/sdb and created bigger partitions, the array was built and in sync after a few hours.

Now, I tried to install grub as I read in the documentation and also tested this in a VM to simulate the RAID1 disk replacement.

grub> root (hd1,0)
grub> setup (hd1)

In the documentation and on my tests this worked like a charm but on the real physical server I get "Error 15".
It cannot find the stage1 in my server, so I tried grub-install and it worked with no errors but after running the bootscriptsinfo,
I can see grub1 is installed in /dev/sdb but will try to boot from hd0 which is not good for me as I want to replace also /dev/sda (hd0).

I have no idea why this didn't work for the real server.


Any help appreciated, I haven't rebooted the server as it is working as a file server and I don't know if it is going to come up, so this weekend I am going to backup /home and reboot it. I also have the old hard drive, so I believe at any point I can actually boot from it and copy over the backup.

Here is my bootscriptsinfo.

---



Boot Info Script 0.61 [1 April 2012]


============================= Boot Info Summary: ===============================

=> Grub Legacy (v0.97) is installed in the MBR of /dev/sda and looks on the
same drive in partition #1 for /boot/grub/stage2 and /boot/grub/menu.lst.
=> Grub Legacy (v0.97) is installed in the MBR of /dev/sdb and looks on boot
drive #1 in partition #1 for /boot/grub/stage2 and /boot/grub/menu.lst.

sda1: __________________________________________________________________________

File system: mdraid
Boot sector type: -
Boot sector info:
Mounting failed: mount: unknown filesystem type 'mdraid'

sda2: __________________________________________________________________________

File system: mdraid
Boot sector type: -
Boot sector info:
Mounting failed: mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'

sda3: __________________________________________________________________________

File system: mdraid
Boot sector type: -
Boot sector info:
Mounting failed: mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'

sdb1: __________________________________________________________________________

File system: mdraid
Boot sector type: -
Boot sector info:
Mounting failed: mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'

sdb2: __________________________________________________________________________

File system: mdraid
Boot sector type: -
Boot sector info:
Mounting failed: mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'

sdb3: __________________________________________________________________________

File system: mdraid
Boot sector type: -
Boot sector info:
Mounting failed: mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'

sdb4: __________________________________________________________________________

File system:
Boot sector type: -
Boot sector info:
Mounting failed: mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type 'mdraid'
mount: unknown filesystem type ''

md0: ___________________________________________________________________________

File system: ext3
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 8.04.4 LTS
Boot files: /boot/grub/menu.lst /etc/fstab

md2: ___________________________________________________________________________

File system: swap
Boot sector type: -
Boot sector info:

md1: ___________________________________________________________________________

File system: ext3
Boot sector type: -
Boot sector info:
Operating System:
Boot files:

============================ Drive/Partition Info: =============================

Drive: sda _____________________________________________________________________

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x000abbde

Partition Boot Start Sector End Sector # of Sectors Id System

/dev/sda1 * 32 62,500,863 62,500,832 fd Linux raid autodetect
/dev/sda2 1,937,904,885 1,953,520,064 15,615,180 fd Linux raid autodetect
/dev/sda3 62,500,864 1,937,899,519 1,875,398,656 fd Linux raid autodetect


Drive: sdb _____________________________________________________________________

Disk /dev/sdb: 3000.5 GB, 3000592982016 bytes
255 heads, 63 sectors/track, 364801 cylinders, total 5860533168 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x00000000

Partition Boot Start Sector End Sector # of Sectors Id System

/dev/sdb1 * 63 100,004,624 100,004,562 fd Linux raid autodetect
/dev/sdb2 124,021,800 3,196,019,294 3,071,997,495 fd Linux raid autodetect
/dev/sdb3 100,004,625 124,021,799 24,017,175 fd Linux raid autodetect
/dev/sdb4 3,196,019,295 5,860,528,064 2,664,508,770 fd Linux raid autodetect


"blkid" output: ________________________________________________________________

Device UUID TYPE LABEL

/dev/md0 cbaa4b3c-ea50-4211-bb34-f65c55867997 ext3
/dev/md1 dbf487fb-8bbb-4ef6-bf34-efe086a9a98a ext3
/dev/md2 2627b650-1249-452f-8cf7-4357bde3f818 swap
/dev/sda1 b4e71627-429d-ac7d-8350-1d5e21714c8a mdraid
/dev/sda2 7bb36491-dd5e-7d58-db74-4fe8465c9f6f mdraid
/dev/sda3 fb46a936-dcf0-2bd8-844f-fbe8892078dc mdraid
/dev/sdb1 b4e71627-429d-ac7d-8350-1d5e21714c8a mdraid
/dev/sdb2 fb46a936-dcf0-2bd8-844f-fbe8892078dc mdraid
/dev/sdb3 7bb36491-dd5e-7d58-db74-4fe8465c9f6f mdraid

================================ Mount points: =================================

Device Mount_Point Type Options

/dev/md0 / ext3 (rw,relatime,errors=remount-ro)
/dev/md1 /home ext3 (rw,relatime)


=========================== md0/boot/grub/menu.lst: ============================

--------------------------------------------------------------------------------
# menu.lst - See: grub(8), info grub, update-grub(8)
# grub-install(8), grub-floppy(8),
# grub-md5-crypt, /usr/share/doc/grub
# and /usr/share/doc/grub-doc/.

## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not use 'savedefault' or your
# array will desync and will not let you boot your system.
default 0

## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout 3

## hiddenmenu
# Hides the menu by default (press ESC to see the menu)
hiddenmenu

# Pretty colours
#color cyan/blue white/blue

## password ['--md5'] passwd
# If used in the first section of a menu file, disable all interactive editing
# control (menu entry editor and command-line) and entries protected by the
# command 'lock'
# e.g. password topsecret
# password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
# password topsecret

#
# examples
#
# title Windows 95/98/NT/2000
# root (hd0,0)
# makeactive
# chainloader +1
#
# title Linux
# root (hd0,1)
# kernel /vmlinuz root=/dev/hda2 ro
#

#
# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST

### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default options below

## DO NOT UNCOMMENT THEM, Just edit them to your needs

## ## Start Default Options ##
## default kernel options
## default kernel options for automagic boot options
## If you want special options for specific kernels use kopt_x_y_z
## where x.y.z is kernel version. Minor versions can be omitted.
## e.g. kopt=root=/dev/hda1 ro
## kopt_2_6_8=root=/dev/hdc1 ro
## kopt_2_6_8_2_686=root=/dev/hdc2 ro
# kopt=root=/dev/md0 ro

## Setup crashdump menu entries
## e.g. crashdump=1
# crashdump=0

## default grub root device
## e.g. groot=(hd0,0)
# groot=(hd0,0)

## should update-grub create alternative automagic boot options
## e.g. alternative=true
## alternative=false
# alternative=true

## should update-grub lock alternative automagic boot options
## e.g. lockalternative=true
## lockalternative=false
# lockalternative=false

## additional options to use with the default boot option, but not with the
## alternatives
## e.g. defoptions=vga=791 resume=/dev/hda5
# defoptions=quiet splash

## should update-grub lock old automagic boot options
## e.g. lockold=false
## lockold=true
# lockold=false

## Xen hypervisor options to use with the default Xen boot option
# xenhopt=

## Xen Linux kernel options to use with the default Xen boot option
# xenkopt=console=tty0

## altoption boot targets option
## multiple altoptions lines are allowed
## e.g. altoptions=(extra menu suffix) extra boot options
## altoptions=(recovery) single
# altoptions=(recovery mode) single

## controls how many kernels should be put into the menu.lst
## only counts the first occurence of a kernel, not the
## alternative kernel options
## e.g. howmany=all
## howmany=7
# howmany=all

## should update-grub create memtest86 boot option
## e.g. memtest86=true
## memtest86=false
# memtest86=true

## should update-grub adjust the value of the default booted system
## can be true or false
# updatedefaultentry=false

## should update-grub add savedefault to the default options
## can be true or false
# savedefault=false

## ## End Default Options ##

title Ubuntu 8.04.4 LTS, kernel 2.6.24-31-server
root (hd0,0)
kernel /boot/vmlinuz-2.6.24-31-server root=/dev/md0 ro quiet splash
initrd /boot/initrd.img-2.6.24-31-server
quiet

title Ubuntu 8.04.4 LTS, kernel 2.6.24-31-server (recovery mode)
root (hd0,0)
kernel /boot/vmlinuz-2.6.24-31-server root=/dev/md0 ro single
initrd /boot/initrd.img-2.6.24-31-server

title Ubuntu 8.04.4 LTS, kernel 2.6.24-29-server
root (hd0,0)
kernel /boot/vmlinuz-2.6.24-29-server root=/dev/md0 ro quiet splash
initrd /boot/initrd.img-2.6.24-29-server
quiet

title Ubuntu 8.04.4 LTS, kernel 2.6.24-29-server (recovery mode)
root (hd0,0)
kernel /boot/vmlinuz-2.6.24-29-server root=/dev/md0 ro single
initrd /boot/initrd.img-2.6.24-29-server

title Ubuntu 8.04.4 LTS, kernel 2.6.24-28-server
root (hd0,0)
kernel /boot/vmlinuz-2.6.24-28-server root=/dev/md0 ro quiet splash
initrd /boot/initrd.img-2.6.24-28-server
quiet

title Ubuntu 8.04.4 LTS, kernel 2.6.24-28-server (recovery mode)
root (hd0,0)
kernel /boot/vmlinuz-2.6.24-28-server root=/dev/md0 ro single
initrd /boot/initrd.img-2.6.24-28-server

title Ubuntu 8.04.4 LTS, kernel 2.6.24-23-server
root (hd0,0)
kernel /boot/vmlinuz-2.6.24-23-server root=/dev/md0 ro quiet splash
initrd /boot/initrd.img-2.6.24-23-server
quiet

title Ubuntu 8.04.4 LTS, kernel 2.6.24-23-server (recovery mode)
root (hd0,0)
kernel /boot/vmlinuz-2.6.24-23-server root=/dev/md0 ro single
initrd /boot/initrd.img-2.6.24-23-server

title Ubuntu 8.04.4 LTS, memtest86+
root (hd0,0)
kernel /boot/memtest86+.bin
quiet

### END DEBIAN AUTOMAGIC KERNELS LIST
--------------------------------------------------------------------------------

================================ md0/etc/fstab: ================================

--------------------------------------------------------------------------------
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/md0
UUID=cbaa4b3c-ea50-4211-bb34-f65c55867997 / ext3 relatime,errors=remount-ro 0 1
# /dev/md1
UUID=dbf487fb-8bbb-4ef6-bf34-efe086a9a98a /home ext3 relatime 0 2
# /dev/md2
UUID=2627b650-1249-452f-8cf7-4357bde3f818 none swap sw 0 0
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0
/dev/scd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0

# scanner files
#//deimos.tsl.local/printer/scanfiles /home/samba/tsl/Scanner cifs username=printer,password=printer,uid=1003,gid=1009,file_mode=0660,dir_mode=0770 0 0
//192.168.0.8/Scan /home/samba/tsl/Scanner cifs password=,uid=1003,gid=1009,file_mode=0660,dir_mode=0770 0 0
--------------------------------------------------------------------------------

==================== md0: Location of files loaded by Grub: ====================

GiB - GB File Fragment(s)

?? = ?? boot/grub/menu.lst
?? = ?? boot/grub/stage2
?? = ?? boot/initrd.img-2.6.24-23-server
?? = ?? boot/initrd.img-2.6.24-23-server.bak
?? = ?? boot/initrd.img-2.6.24-28-server
?? = ?? boot/initrd.img-2.6.24-28-server.bak
?? = ?? boot/initrd.img-2.6.24-29-server
?? = ?? boot/initrd.img-2.6.24-29-server.bak
?? = ?? boot/initrd.img-2.6.24-31-server
?? = ?? boot/initrd.img-2.6.24-31-server.bak
?? = ?? boot/vmlinuz-2.6.24-23-server
?? = ?? boot/vmlinuz-2.6.24-28-server
?? = ?? boot/vmlinuz-2.6.24-29-server
?? = ?? boot/vmlinuz-2.6.24-31-server
?? = ?? initrd.img
?? = ?? initrd.img.old
?? = ?? vmlinuz
?? = ?? vmlinuz.old
 
Old 04-28-2012, 06:04 AM   #2
jschiwal
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Registered: Aug 2001
Location: Fargo, ND
Distribution: SuSE AMD64
Posts: 15,733

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Look at the second example in the comments. It installs grub to both.
http://blog.bigsmoke.us/2009/06/21/i...-grub-on-raid1
You might consider having the initial partition being non-raid, and use /dev/sdb1 as a n identical clone. A regular or image backup of /boot as well will be a snap due to it's small size.
 
Old 04-28-2012, 06:13 AM   #3
kamuz
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Registered: Nov 2003
Posts: 4

Original Poster
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Thanks for the reply.
Actually that's what I did in my tests and worked fine but if I try to do that with the new hard-drive, I get the Error 15 from Grub.
 
Old 04-30-2012, 07:10 PM   #4
jschiwal
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Registered: Aug 2001
Location: Fargo, ND
Distribution: SuSE AMD64
Posts: 15,733

Rep: Reputation: 654Reputation: 654Reputation: 654Reputation: 654Reputation: 654Reputation: 654
Try booting from the grub menu after replacing sda' using sdb1 as the grub root. The grub menu has tab-completion. If you can find boot partition from the grub shell, you should be able to boot. If that doesn't work' boot from a cdrom, perform the steps you need after replacing sda, then you can boot from sda1 as normal.

I still prefer a normal /boot partition were possible. Just saying.

Last edited by jschiwal; 04-30-2012 at 07:13 PM.
 
  


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