Después de la creación exitosa del kernel Xen y la entrada en grub, cada vez que intento iniciar el kernel Xen recibo el siguiente error:
Gave up waiting for root device. Common problems:
— Boot args (cat /proc/cmdline)
— Check rootdelay= (did the system wait long enough?)
— Check root= (did the system wait for the right device?)
— Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/sda6 does not exist.
Dropping to a shell!
Aquí está la entrada en /boot/grub/menu.lst
title Xen 4.1.2 / Ubuntu 10.04.4 kernel 2.6.32.40 (root=sda6)
uuid 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
#root (hd0,1)
kernel /xen-4.1.2.gz dom0_mem=4096M,max:4096M loglvl=all guest_loglvl=all
module /vmlinuz-2.6.32.40 dummy=dummy root=/dev/sda6 ro console=tty0 nomodeset rootdelay=50
module /initrd.img-2.6.32.40
A continuación se proporciona una sección del archivo de información de arranque:
============================= Boot Info Summary: ==============================
=> Grub0.97 is installed in the MBR of /dev/sda and looks on the same drive
in partition #2 for /grub/stage2 and /grub/menu.lst.
sda1: _________________________________________________________________________
File system: ext2
Boot sector type: Grub
Boot sector info: Grub0.97 is installed in the boot sector of sda1 and
looks at sector 4462688 of the same hard drive for the
stage2 file. A stage2 file is at this location on
/dev/sda. Stage2 looks on partition #2 for
/grub/menu.lst.
Operating System:
Boot files/dirs:
sda2: _________________________________________________________________________
File system: ext4
Boot sector type: Grub
Boot sector info: Grub0.97 is installed in the boot sector of sda2 and
looks at sector 4462688 of the same hard drive for the
stage2 file. A stage2 file is at this location on
/dev/sda. Stage2 looks on partition #2 for
/grub/menu.lst.
Operating System:
Boot files/dirs: /grub/menu.lst /grub/grub.cfg /grub/core.img
sda3: _________________________________________________________________________
File system: Extended Partition
Boot sector type: -
Boot sector info:
sda5: _________________________________________________________________________
File system: swap
Boot sector type: -
Boot sector info:
sda6: _________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 10.04.4 LTS
Boot files/dirs: /boot/grub/menu.lst /boot/grub/grub.cfg /etc/fstab
/boot/grub/core.img
sda7: _________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 10.04.4 LTS
Boot files/dirs: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img
sda8: _________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System:
Boot files/dirs:
sda9: _________________________________________________________________________
File system:
Boot sector type: -
Boot sector info:
Mounting failed:
mount: unknown filesystem type ''
=========================== Drive/Partition Info: =============================
Drive: sda ___________________ _____________________________________________________
Disk /dev/sda: 1788.6 GB, 1788618997760 bytes
255 heads, 63 sectors/track, 217453 cylinders, total 3493396480 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
Partition Boot Start End Size Id System
/dev/sda1 2,048 4,095 2,048 83 Linux
/dev/sda2 * 4,096 19,535,871 19,531,776 83 Linux
/dev/sda3 19,537,918 3,493,394,431 3,473,856,514 5 Extended
/dev/sda5 19,537,920 39,067,647 19,529,728 82 Linux swap / Solaris
/dev/sda6 39,069,696 136,724,479 97,654,784 83 Linux
/dev/sda7 136,726,528 234,381,311 97,654,784 83 Linux
/dev/sda8 234,383,360 332,038,143 97,654,784 83 Linux
/dev/sda9 332,040,192 3,493,394,431 3,161,354,240 83 Linux
blkid -c /dev/null: ____________________________________________________________
/dev/sda1: UUID="1dd012ba-04e8-4c89-bd25-0e9f89e991eb" TYPE="ext2"
/dev/sda2: UUID="8edf0e1b-5f9c-4ca0-8f88-77d35af87093" TYPE="ext4"
/dev/sda5: UUID="b5e5c40e-193c-4c6d-9068-45cc033b66a9" TYPE="swap"
/dev/sda6: UUID="266e71af-e145-495b-b38f-2da1f444885d" TYPE="ext4"
/dev/sda7: UUID="52f32e5d-9b43-4972-bb2e-e97133dd2c80" TYPE="ext4"
/dev/sda8: UUID="015a40de-8f96-4c1b-8fb1-1a23575054a6" TYPE="ext4"
=============================== "mount" output: ===============================
/dev/sda6 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
none on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /dev type devtmpfs (rw,mode=0755)
none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
none on /dev/shm type tmpfs (rw,nosuid,nodev)
none on /var/run type tmpfs (rw,nosuid,mode=0755)
none on /var/lock type tmpfs (rw,noexec,nosuid,nodev)
none on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
/dev/sda2 on /boot type ext4 (rw)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
=========================== sda6/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-legacy-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
fallback 2
## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout 10
## 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=UUID=266e71af-e145-495b-b38f-2da1f444885d ro
## default grub root device
## e.g. groot=(hd0,0)
# groot=8edf0e1b-5f9c-4ca0-8f88-77d35af87093
## 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
## specify if running in Xen domU or have grub detect automatically
## update-grub will ignore non-xen kernels when running in domU and vice versa
## e.g. indomU=detect
## indomU=true
## indomU=false
# indomU=detect
## 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 Xen 4.1.2 / Ubuntu 10.04.4 kernel 2.6.32.40 (root=sda6)
uuid 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
#root (hd0,1)
kernel /xen-4.1.2.gz dom0_mem=4096M,max:4096M loglvl=all guest_loglvl=all
module /vmlinuz-2.6.32.40 dummy=dummy root=/dev/sda6 ro console=tty0 nomodeset rootdelay=50
module /initrd.img-2.6.32.40
title Xen 4.2.0-rc3 / Ubuntu 10.04.4 kernel 2.6.32.40 (root=sda6)
uuid 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
#root (hd0,1)
kernel /xen-4.2.0-rc3-pre.gz dom0_mem=4096M,max:4096M loglvl=all guest_loglvl=all com1=9600,8n1 console=com1,vga
module /vmlinuz-2.6.32.40 root=UUID=266e71af-e145-495b-b38f-2da1f444885d ro console=tty0 console=hvc0 earlyprintk=xen nomodeset
module /initrd.img-2.6.32.40
title Ubuntu 10.04.4 LTS, kernel 2.6.32-42-generic (sda6)
uuid 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
kernel /vmlinuz-2.6.32-42-generic root=/dev/sda6 ro quiet splash
initrd /initrd.img-2.6.32-42-generic
title Ubuntu 10.04.4 LTS, kernel 2.6.32-42-generic (sda7)
uuid 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
kernel /vmlinuz-2.6.32-42-generic root=/dev/sda7 ro quiet splash
initrd /initrd.img-2.6.32-42-generic
title Ubuntu 10.04.4 LTS, kernel 3.1.0-rc9+
uuid 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
kernel /vmlinuz-3.1.0-rc9+ root=UUID=266e71af-e145-495b-b38f-2da1f444885d ro quiet splash
title Ubuntu 10.04.4 LTS, kernel 3.1.0-rc9+ (recovery mode)
uuid 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
kernel /vmlinuz-3.1.0-rc9+ root=UUID=266e71af-e145-495b-b38f-2da1f444885d ro single
title Ubuntu 10.04.4 LTS, kernel 2.6.32.40
uuid 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
kernel /vmlinuz-2.6.32.40 root=UUID=266e71af-e145-495b-b38f-2da1f444885d ro quiet splash
initrd /initrd.img-2.6.32.40
title Ubuntu 10.04.4 LTS, kernel 2.6.32.40 (recovery mode)
uuid 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
kernel /vmlinuz-2.6.32.40 root=UUID=266e71af-e145-495b-b38f-2da1f444885d ro single
initrd /initrd.img-2.6.32.40
title Ubuntu 10.04.4 LTS, kernel 2.6.32-42-generic (recovery mode)
uuid 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
kernel /vmlinuz-2.6.32-42-generic root=UUID=266e71af-e145-495b-b38f-2da1f444885d ro single
initrd /initrd.img-2.6.32-42-generic
title Ubuntu 10.04.4 LTS, kernel 2.6.32-38-generic
uuid 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
kernel /vmlinuz-2.6.32-38-generic root=UUID=266e71af-e145-495b-b38f-2da1f444885d ro quiet splash
initrd /initrd.img-2.6.32-38-generic
title Ubuntu 10.04.4 LTS, kernel 2.6.32-38-generic (recovery mode)
uuid 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
kernel /vmlinuz-2.6.32-38-generic root=UUID=266e71af-e145-495b-b38f-2da1f444885d ro single
initrd /initrd.img-2.6.32-38-generic
title Chainload into GRUB 2
root 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
kernel /boot/grub/core.img
#title Ubuntu 10.04.4 LTS, memtest86+
#uuid 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
#kernel /memtest86+.bin
### END DEBIAN AUTOMAGIC KERNELS LIST
=========================== sda6/boot/grub/grub.cfg: ===========================
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
load_env
fi
set default="0"
if [ ${prev_saved_entry} ]; then
set saved_entry=${prev_saved_entry}
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z ${boot_once} ]; then
saved_entry=${chosen}
save_env saved_entry
fi
}
function recordfail {
set recordfail=1
if [ -n ${have_grubenv} ]; then if [ -z ${boot_once} ]; then save_env recordfail; fi; fi
}
insmod ext2
set root='(hd0,6)'
search --no-floppy --fs-uuid --set 266e71af-e145-495b-b38f-2da1f444885d
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=640x480
insmod gfxterm
insmod vbe
if terminal_output gfxterm ; then true ; else
# For backward compatibility with versions of terminal.mod that don't
# understand terminal_output
terminal gfxterm
fi
fi
insmod ext2
set root='(hd0,2)'
search --no-floppy --fs-uuid --set 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
set locale_dir=($root)/grub/locale
set lang=en
insmod gettext
if [ ${recordfail} = 1 ]; then
set timeout=-1
else
set timeout=10
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/08_xen ###
menuentry "Xen Unstable 4.2 RC3 / Debian Squeeze kernel 2.6.32.40" {
insmod ext2
set root='(hd0,4)'
multiboot (hd0,1)/xen-4.2.0-rc3-pre.gz dummy
module (hd0,1)/vmlinuz-2.6.32.40 dummy root=UUID=266e71af-e145-495b-b38f-2da1f444885d ro quiet console=tty0 nomodeset rootdelay=130
module (hd0,1)/initrd.img-2.6.32.40
}
### END /etc/grub.d/08_xen ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Ubuntu, with Linux 3.1.0-rc9+' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,2)'
search --no-floppy --fs-uuid --set 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
linux /vmlinuz-3.1.0-rc9+ root=/dev/sda6 ro quiet splash
}
menuentry 'Ubuntu, with Linux 2.6.32.40' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,2)'
search --no-floppy --fs-uuid --set 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
linux /vmlinuz-2.6.32.40 root=UUID=266e71af-e145-495b-b38f-2da1f444885d ro quiet splash
initrd /initrd.img-2.6.32.40
}
menuentry 'Ubuntu, with Linux 2.6.32-42-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,2)'
search --no-floppy --fs-uuid --set 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
linux /vmlinuz-2.6.32-42-generic root=UUID=266e71af-e145-495b-b38f-2da1f444885d ro quiet splash
initrd /initrd.img-2.6.32-42-generic
}
menuentry 'Ubuntu, with Linux 2.6.32-38-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,2)'
search --no-floppy --fs-uuid --set 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
linux /vmlinuz-2.6.32-38-generic root=UUID=266e71af-e145-495b-b38f-2da1f444885d ro quiet splash
initrd /initrd.img-2.6.32-38-generic
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod ext2
set root='(hd0,2)'
search --no-floppy --fs-uuid --set 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
linux16 /memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod ext2
set root='(hd0,2)'
search --no-floppy --fs-uuid --set 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
linux16 /memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
=============================== sda6/etc/fstab: ===============================
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
# / was on /dev/sda6 during installation
UUID=266e71af-e145-495b-b38f-2da1f444885d / ext4 errors=remount-ro 0 1
# /boot was on /dev/sda2 during installation
UUID=8edf0e1b-5f9c-4ca0-8f88-77d35af87093 /boot ext4 defaults 0 2
# swap was on /dev/sda5 during installation
UUID=b5e5c40e-193c-4c6d-9068-45cc033b66a9 none swap sw 0 0
nas-1g:/export/utils/scratch /sapmnt/scratch nfs defaults 0 0
nas-1g:/export/virtual_machines /sapmnt/virtual_machines nfs defaults 0 0
=================== sda6: Location of files loaded by Grub: ===================
20.0GB: boot/grub/grub.cfg
20.0GB: boot/grub/menu.lst
20.0GB: boot/grub/stage2
20.0GB: boot/initrd.img-2.6.32-38-generic
20.0GB: boot/initrd.img-2.6.32.40
20.0GB: boot/initrd.img-2.6.32-42-generic
20.0GB: boot/vmlinuz-2.6.32-38-generic
20.0GB: boot/vmlinuz-2.6.32.40
20.0GB: boot/vmlinuz-2.6.32-42-generic
20.0GB: boot/vmlinuz-3.1.0-rc9+
20.0GB: initrd.img
20.0GB: initrd.img.old
20.0GB: vmlinuz
20.0GB: vmlinuz.old
Ya intenté usar rootdelay=50 para aumentar las posibilidades de detectar el dispositivo raíz, pero hasta ahora no he tenido suerte.
Respuesta1
¿Por qué has comentado la entrada raíz en menu.lst? ¿Has probado esto?
title Xen 4.1.2 / Ubuntu 10.04.4 kernel 2.6.32.40 (root=sda6)
uuid 8edf0e1b-5f9c-4ca0-8f88-77d35af87093
root (hd0,6)
kernel /xen-4.1.2.gz dom0_mem=4096M,max:4096M loglvl=all guest_loglvl=all
module /vmlinuz-2.6.32.40 dummy=dummy root=/dev/sda6 ro console=tty0 nomodeset rootdelay=50
module /initrd.img-2.6.32.40
NOTA: Ha pasado un tiempo desde que usé el antiguo GRUB, verifique que hd0,6 realmente corresponda a sda6. Debería, ya que sda6 es la segunda partición lógica de su partición extendida, pero verifique de todos modos.
Veo que también tienes un archivo grub.cfg. Supongo, por tanto, que tienes GRUB2 instalado. ¿Le va mejor a eso? ¿No detectará y configurará todo correctamente si ejecuta
$ sudo update-grub
$ sudo grub-install /dev/sda