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#1 2009-07-05 20:27:46

Caio
Member
Registered: 2009-07-05
Posts: 19

GRUB error 15 when booting

I thought it would be best to create a new thread, as this is a different subject.

I'm trying to get a dual-boot Arch / Windows XP setup going. I created four partitions for Arch and finished the installer, but now GRUB gives me an "error 15" and won't even launch. After looking around a bit I learned that this error means that GRUB is looking for something but not finding it. I tried many different solutions and none worked.

My partitions are:

sdb1 -> Windows XP
sdb2 -> boot
sdb3 -> swap
sdb5 -> root
sdb6 -> home

Here's some info I think would be useful:

device.map:

(fd0)    /dev/fd0
(hd0)    /dev/sda
(hd1)    /dev/sdb

blkid:

/dev/sda1: LABEL="MAGUS" UUID="43DC-06FF" TYPE="vfat" 
/dev/sdb1: UUID="8644E64C44E63F15" LABEL="LAVOS" TYPE="ntfs" 
/dev/sdb2: UUID="d0ac72c6-5864-428d-bbb9-e3d20d8ddde5" SEC_TYPE="ext2" TYPE="ext3" 
/dev/sdb3: UUID="7a716785-a76b-4dd4-8353-48d5afa0a306" TYPE="swap" 
/dev/sdb5: UUID="48700728-0695-46f1-8f47-ea364800af1a" SEC_TYPE="ext2" TYPE="ext3" 
/dev/sdb6: UUID="f1769be4-4c81-4e9c-b2c9-51cbc5743d09" SEC_TYPE="ext2" TYPE="ext3"

menu.lst:

# Config file for GRUB - The GNU GRand Unified Bootloader
# /boot/grub/menu.lst

# DEVICE NAME CONVERSIONS 
#
#  Linux           Grub
# -------------------------
#  /dev/fd0        (fd0)
#  /dev/sda        (hd0)
#  /dev/sdb2       (hd1,1)
#  /dev/sda3       (hd0,2)
#

#  FRAMEBUFFER RESOLUTION SETTINGS
#     +-------------------------------------------------+
#          | 640x480    800x600    1024x768   1280x1024
#      ----+--------------------------------------------
#      256 | 0x301=769  0x303=771  0x305=773   0x307=775
#      32K | 0x310=784  0x313=787  0x316=790   0x319=793
#      64K | 0x311=785  0x314=788  0x317=791   0x31A=794
#      16M | 0x312=786  0x315=789  0x318=792   0x31B=795
#     +-------------------------------------------------+
#  for more details and different resolutions see
#  http://wiki.archlinux.org/index.php/GRUB#Framebuffer_Resolution 

# general configuration:
timeout   5
default   0
color light-blue/black light-cyan/blue

# boot sections follow
# each is implicitly numbered from 0 in the order of appearance below
#
# TIP: If you want a 1024x768 framebuffer, add "vga=773" to your kernel line.
#
#-*

# (0) Arch Linux              
title  Arch Linux
root   (hd1,1)
kernel /vmlinuz26 root=/dev/disk/by-uuid/d0ac72c6-5864-428d-bbb9-e3d20d8ddde5 ro vga=773
initrd /kernel26.img

# (1) Arch Linux
title  Arch Linux Fallback
root   (hd1,1)
kernel /vmlinuz26 root=/dev/disk/by-uuid/d0ac72c6-5864-428d-bbb9-e3d20d8ddde5 ro
initrd /kernel26-fallback.img

# (2) Windows
title Windows XP
rootnoverify (hd1,0)
makeactive
chainloader +1

"find /grub/stage1" gives me (hd1,1). grub is installed in sdb2 rather than just sdb (as suggested by the dual-booting guide on Arch Wiki), and both vmlinuz26 and the kernel are there. I tried changing "root" in menu.lst to "(hd0,1)" and using /dev/sdb2 instead of the UUID, but neither worked.

I have nearly no experience with Linux, so any help is appreciated.

Thank you!

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#2 2009-07-05 20:38:07

Trent
Member
From: Baltimore, MD (US)
Registered: 2009-04-16
Posts: 990

Re: GRUB error 15 when booting

Clarification, please:  when do you get the error?  Does GRUB show you a menu, and if so, can you boot into Windows?

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#3 2009-07-05 20:47:44

Caio
Member
Registered: 2009-07-05
Posts: 19

Re: GRUB error 15 when booting

Nope, GRUB doesn't launch at all. I see no menu, no nothing. It happens during start-up and I can't start either OS. I'm currently using an old Ubuntu Live CD I found.

Last edited by Caio (2009-07-05 20:51:42)

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#4 2009-07-05 21:14:37

Zepp
Member
From: Ontario, Canada
Registered: 2006-03-25
Posts: 334
Website

Re: GRUB error 15 when booting

The root(hd#,#) should indeed point to your boot partition, which you seem to have right. However the root= argument you pass to the kernel should be your actual root, you have this set to the /boot partition's uuid I believe, try changing this first. Also make sure the boot partition is marked bootable in fdisk.

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#5 2009-07-05 21:31:33

Caio
Member
Registered: 2009-07-05
Posts: 19

Re: GRUB error 15 when booting

Nope, no luck. Here's menu.lst:

# (0) Arch Linux              
title  Arch Linux
root   (hd1,1)
kernel /vmlinuz26 root=/dev/disk/by-uuid/48700728-0695-46f1-8f47-ea364800af1a ro vga=773
initrd /kernel26.img

# (1) Arch Linux
title  Arch Linux Fallback
root   (hd1,1)
kernel /vmlinuz26 root=/dev/disk/by-uuid/48700728-0695-46f1-8f47-ea364800af1a ro
initrd /kernel26-fallback.img

# (2) Windows
title Windows XP
rootnoverify (hd1,0)
makeactive
chainloader +1

and fdisk:

Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xc14bc14b

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        9728    78140128+   c  W95 FAT32 (LBA)

Disk /dev/sdb: 320.0 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xe2fbe2fb

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1       32059   257513886    7  HPFS/NTFS
/dev/sdb2   *       32060       32071       96390   83  Linux
/dev/sdb3           32072       32195      996030   82  Linux swap / Solaris
/dev/sdb4           32196       38913    53962335    5  Extended
/dev/sdb5           32196       34019    14651248+  83  Linux
/dev/sdb6           34020       38913    39311023+  83  Linux

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#6 2009-07-05 23:25:53

Caio
Member
Registered: 2009-07-05
Posts: 19

Re: GRUB error 15 when booting

Um, just now I went to /dev/ using Ubuntu's file browser and noticed that there weren't files for sdb2 to 6, but there were for sda2 to 6. I changed menu.lst to look for root in /dev/sda5, didn't work; came back to Ubuntu, changed it to /dev/sdb5, didn't work again. However, now it seems there are files for sdb2-6 - but not sda! What is going on? Could it have anything to do with the GRUB issue?

Also, earlier I tried reinstalling grub with "setup (hd1,1)" and the problem persisted...

Edit: Forgot to mention - error happens at stage 1.5.

Last edited by Caio (2009-07-06 14:11:52)

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