Hi,
on one of several machines I have a problem with initramfs.
The machine has a single SATA drive. When the kernel boots it shows
that it is called /dev/sda,....
Now, within the init script of my initramfs it tries to mount /dev/sda2
as root but fails.
Since the initramfs spawns a shell (busybox) I can see the device files
for /dev/sda?
but fdisk /dev/sda fails.
As it turns out, the harddisk is now named /dev/sdb with /dev/sdb?
partition names.
Since this setup is identical to that of several other machines where
it just works,
I'm puzzled.
Has anybody an idea what might be going on?
Many thanks,
Helmut.
This is my init script
#!/bin/busybox sh
rescue_shell() {
echo "$@"
echo "Something went wrong. Dropping you to a shell."
busybox --install -s
exec /bin/sh
}
uuidlabel_root() {
for cmd in $(cat /proc/cmdline) ; do
case $cmd in
root=*)
type=$(echo $cmd | cut -d= -f2)
echo "Mounting rootfs"
if [ $type == "LABEL" ] || [ $type == "UUID" ] ; then
uuid=$(echo $cmd | cut -d= -f3)
mount -o ro $(findfs "$type"="$uuid") /mnt/root
else
mount -o ro $(echo $cmd | cut -d= -f2) /mnt/root
fi
;;
esac
done
}
check_filesystem() {
# most of code coming from /etc/init.d/fsck
local fsck_opts= check_extra= RC_UNAME=$(uname -s)
# FIXME : get_bootparam forcefsck
if [ -e /forcefsck ]; then
fsck_opts="$fsck_opts -f"
check_extra="(check forced)"
fi
echo "Checking local filesystem $check_extra : $1"
if [ "$RC_UNAME" = Linux ]; then
fsck_opts="$fsck_opts -C0 -T"
fi
trap : INT QUIT
# using our own fsck, not the builtin one from busybox
/sbin/fsck ${fsck_args--p} $fsck_opts $1
case $? in
0) return 0;;
1) echo "Filesystem repaired"; return 0;;
2|3) if [ "$RC_UNAME" = Linux ]; then
echo "Filesystem repaired, but reboot needed"
reboot -f
else
rescue_shell "Filesystem still have errors;
manual fsck required"
fi;;
4) if [ "$RC_UNAME" = Linux ]; then
rescue_shell "Fileystem errors left
uncorrected, aborting"
else
echo "Filesystem repaired, but reboot needed"
reboot
fi;;
8) echo "Operational error"; return 0;;
12) echo "fsck interrupted";;
*) echo "Filesystem couldn't be fixed";;
esac
rescue_shell
}
# temporarily mount proc and sys
mount -t proc none /proc
mount -t sysfs none /sys
echo /sbin/mdev > /proc/sys/kernel/hotplug
mdev -s
# only do this if you've built devtmpfs support into your kernel
# mount -t devtmpfs none /dev HJ: done by the kernel itself
# disable kernel messages from popping onto the screen
echo 0 > /proc/sys/kernel/printk
# clear the screen
# clear
# ====================== start doing stuff
# mounting rootfs on /mnt/root
uuidlabel_root || rescue_shell "Error with uuidlabel_root"
btrfs device scan
# space separated list of mountpoints that ...
mountpoints="/usr"
# ... we want to find in /etc/fstab ...
# ln -s /mnt/root/etc/fstab /etc/fstab
# ... to check filesystems and mount our devices.
for m in $mountpoints ; do
check_filesystem $m
echo "Mounting $m"
# mount the device and ...
mount $m || rescue_shell "Error while mounting $m"
# ... move the tree to its final location
mount --move $m "/mnt/root"$m || rescue_shell "Error while moving
$m"
done
echo "All done. Switching to real root."
# ====================== end doing stuff
mount -o remount,rw /mnt/root
cp /proc/mounts /mnt/root/mtab
# clean up. The init process will remount proc sys and dev later
umount /proc
umount /sys
# umount /dev # fails, since it's automounted by the kernel
# switch to the real root and execute init
exec switch_root /mnt/root /sbin/init "$@"
