Debricking Script That Can Keep Data
Hi all,
I decided to learn how to write Linux scripts (yes, my first one) and do something sensefull as well. I don't have much experience in Linux, which is why MyBook got bricked in the first place ^^
First a definition. A device is bricked when it serves about as much purpose as a brick of equal mass:
http://en.wikipedia.org/wiki/File:Brick_pile.jpg
i.e. you cannot access the ssh function, the webinterface or files. this could happen after to much play via ssh for instance.
Credit where it is due. I started out from the scripts given in thread:
http://mybookworld.wikidot.com/forum/t-317579/complitly-debricking-guide-draft
I furthermore decided to create a new thread with my edition in order to minimize confusion.
This script is not meant to be runned on the MyBook Live via ssh. If you could do that, it is not bricked. In order to debrick the mybook live you have to take it apart and connect it to a PC running linux. Live cds of for instance ubuntu works fine. As for the mac crowd. I dont know, you could try it, but i have no mac to to try it on.
To take the MyBook apart follow the guide at:
http://mybookworld.wikidot.com/forum/t-337415/change-hdd-in-mbl
When you hold the black shiny HDD in your hands: connect it to your computer and run the script. follow the instructions, and rejoice!
Please note that this does not make the HDD accessible to the computer you connected it to. You cannot access your data from that one. Connect the HDD back to the MyBook Live motherboard and access it as usual over the network. This is because of the blocksize (there are topics about that in this forum).
please write a thanks in the thread if it helped you (or didnt). i am curious if anyone use it and how it worked ^^
Best of Luck!
#!/bin/bash
#
# The purpose of the script is to reinstall the operating system (debrick) on
# a harddrive that has been extracted from the housing of a WD MyBook Live.
#
#help screen
if [ $# = 1 -a "$1" = "--help" ]; then
echo "
standard use of script is:
sudo ./debricker.sh the script will find out what disk to use, it will not
touch the partition tables and therefore perserves data.
it will look what the newest version of the firmware is
via internet and then search for it in current folder or
subfolders. if none is found it will download one.
possible options are:
/dev/sd? path to the disk from mybook live. if not given, the script
will figure it out on its own.
/*/*.img path to the firmware that will be written to the disk. if
not given, the script will search for and then download it.
destroy script will rewrite the partition table of disk,
this will not perserve data, must match /dev/sd?.
example
sudo ./debricker.sh /dev/sda /firmwares/mine.img destroy
"
exit 1
fi
echo
#check that requirements are fullfilled
if [ "$(id -u)" != "0" ]; then
echo -e "this script must be run as root.\n"
exit 1
fi
if ! which mdadm > /dev/null; then
echo -e "this script requires the mdadm package.\n"
exit 1
fi
#making sure the mountpoint is available
rootfsMount=/mnt/md0
if [ -e ${rootfsMount} ]; then
if mountpoint -q ${rootfsMount}; then
echo "${rootfsMount} needs to be unmounted."
exit 1;
fi
fi
test -d "./mnt" || mkdir -p "/mnt"
test -d "$rootfsMount" || mkdir -p "$rootfsMount"
#making sure that there is no raid unit running
rootfsRaid=/dev/md0
if [ -e $rootfsRaid ]; then
echo -e "\n$rootfsRaid already exists! you need to stop and remove it.\n"
exit 1;
fi
#standard choices
disk=notset
image_img=notset
destroy=false
#handles the arguments and sets options
for (( arg=1; arg<=${#}; arg++ ))
do
case ${!arg} in
/dev/sd?) disk=${!arg};;
*.img) image_img=${!arg};;
"destroy") destroy=true;;
*) echo "unknown argument: ${!arg}"
exit 1
esac
done
echo "********************** DISK **********************"
echo
#figure out what disk to use
if [ $disk = "notset" ]; then
for x in {a..z}
do
#avoid a to literal matching in order to avoid incompability.
if [ -e /dev/sd${x} ]; then
diskTest=$(parted --script /dev/sd${x} print)
if [ ! -e /dev/sd${x}0 -a ! -e /dev/sd${x}5 ]; then
if [[ $diskTest = *WD??EARS* ]]; then
if [[ $diskTest = *??00GB* ]]; then
if [[ $diskTest = *3*B*B*5??MB*primary* ]]; then
if [[ $diskTest = *1*B*B*2???MB*ext3*primary*raid* ]]; then
if [[ $diskTest = *2*B*B*2???MB*ext3*primary*raid* ]]; then
if [[ $diskTest = *4*B*B*GB*ext4*primary* ]]; then
if [ $disk != notset ]; then
echo "multiple disk founds, you must enter the path manually:"
echo " sudo ./debricker.sh /dev/sd?"
exit 1;
fi
disk=/dev/sd${x}
fi; fi; fi; fi; fi; fi; fi; fi
done
if [ $disk == notset ]; then
echo "script could not find a matching sd unit connected to system."
exit 1
fi
else
if [ ! -e $disk ]; then
echo "$disk does not exist."
exit 1;
fi
fi
echo -e "script will use the following disk: \n"
parted --script $disk print
read -p "is this REALLY the disk you want? [y] " -n 1
if ! [[ $REPLY =~ ^[Yy]$ ]]; then
echo -e "\nuser did not confirm, nothing was done.\n"
exit 1;
fi
echo
diskRoot1=${disk}1
diskRoot2=${disk}2
diskSwap=${disk}3
diskData=${disk}4
echo
echo "********************** IMAGE **********************"
echo
#the image was not given as parameter
if [ $image_img = notset ]; then
#find out what the latest version of firmware is
if ! which curl > /dev/null; then
echo -e "\nthis script requires the curl package, either install it or specify image file.\n"
exit 1
fi
wdc_homepage="http://websupport.wdc.com/firmware/list.asp"
wdc_latestfirmware=$(curl "${wdc_homepage}?type=AP1NC&fw=01.03.03" 2> /dev/null | awk ' {
if ( match($0, "upgrade file" ) != 0 ) {
split($0, http, "\"");
print http[2];
exit 1;
}
}')
latestversion_simple=$(echo $wdc_latestfirmware | cut -d'-' -f 2)
latestversion_pattern=$(echo $latestversion_simple | sed 's/../&*/g;s/:$//')
if [ "$latestversion_simple" == "" -o "$latestversion_pattern" == "" ]; then
echo -e "\ncould not fetch the latest version!\n"
exit 1;
fi
echo "checking: ${latestversion_simple}"
echo "searching: ./*/*${latestversion_pattern}.img"
image_img=$(find ./ -type f -name "*${latestversion_pattern}.img" -print; 2>/dev/null)
#get the latest firmware either from subdirs or internet
case `echo $image_img | wc -w` in
0) echo "searching: ./*/*${latestversion_pattern}.deb"
test -d "./firmware" || mkdir -p "./firmware"
image_deb=$(find ./ -type f -name "*${latestversion_pattern}.deb" -print; 2>/dev/null)
image_img="./firmware/rootfs_$latestversion_simple.img"
if ! [ `echo $image_deb | wc -w` == 1 ]; then
image_deb="./firmware/rootfs_$latestversion_simple.deb"
echo
echo "downloading: $image_deb"
read -p "confirm [y]: " -n 1
if ! [[ $REPLY =~ ^[Yy]$ ]]; then
exit 1
fi
echo
curl $wdc_latestfirmware > $image_deb
if [ $? != 0 ]; then
echo -e "\ndownloading encountered problems.\n"
exit 1;
fi
fi
echo
echo "will extract: $image_deb"
read -p "confirm [y]: " -n 1
echo
if ! [[ $REPLY =~ ^[Yy]$ ]]; then
exit 1
fi
echo "extracting: ./firmware/rootfs_${latestversion_simple}.img"
ar p $image_deb data.tar.lzma | unlzma | tar -x -C ./firmware
if [ $? != 0 ]; then
echo -e "\nextraction encountered problems.\n"
exit 1;
fi
mv ./firmware/CacheVolume/upgrade/rootfs.img ./firmware/rootfs_${latestversion_simple}.img
rm -rf ./firmware/CacheVolume;;
1) echo "found: $image_img";;
*) echo -e "\nmultiple image_img files was found."
exit 1
esac
else
if [ ! -e $image_img ]; then
echo "$image_img does not exist."
exit 1;
fi
fi
#construct the swap program
echo "\
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/mount.h>
#define MD_RESERVED_BYTES (64 * 1024)
#define MD_RESERVED_SECTORS (MD_RESERVED_BYTES / 512)
#define MD_NEW_SIZE_SECTORS(x) ((x & ~(MD_RESERVED_SECTORS - 1)) - MD_RESERVED_SECTORS)
main(int argc, char *argv[])
{
int fd, i;
unsigned long size;
unsigned long long offset;
char super[4096];
if (argc != 2) {
fprintf(stderr, \"Usage: swap_super device\\n\");
exit(1);
}
fd = open(argv[1], O_RDWR);
if (fd<0) {
perror(argv[1]);
exit(1);
}
if (ioctl(fd, BLKGETSIZE, &size)) {
perror(\"BLKGETSIZE\");
exit(1);
}
offset = MD_NEW_SIZE_SECTORS(size) * 512LL;
if (lseek64(fd, offset, 0) < 0LL) {
perror(\"lseek64\");
exit(1);
}
if (read(fd, super, 4096) != 4096) {
perror(\"read\");
exit(1);
}
for (i=0; i < 4096 ; i+=4) {
char t = super[i];
super[i] = super[i+3];
super[i+3] = t;
t=super[i+1];
super[i+1]=super[i+2];
super[i+2]=t;
}
/* swap the u64 events counters */
for (i=0; i<4; i++) {
/* events_hi and events_lo */
char t=super[32*4+7*4 +i];
super[32*4+7*4 +i] = super[32*4+8*4 +i];
super[32*4+8*4 +i] = t;
/* cp_events_hi and cp_events_lo */
t=super[32*4+9*4 +i];
super[32*4+9*4 +i] = super[32*4+10*4 +i];
super[32*4+10*4 +i] = t;
}
if (lseek64(fd, offset, 0) < 0LL) {
perror(\"lseek64\");
exit(1);
}
if (write(fd, super, 4096) != 4096) {
perror(\"write\");
exit(1);
}
exit(0);
}" >./swap.c
gcc swap.c -o swap
rm swap.c
echo
echo "********************** IMPLEMENTATION **********************"
echo -e "
everything is now prepared!
device: $disk
image_img: $image_img
destroy: $destroy\n"
read -p "this is the point of no return, continue? [y] " -n 1
echo
if ! [[ $REPLY =~ ^[Yy]$ ]]; then
exit 1;
fi
echo
#rewrite the partition table
if [ $destroy = true ]; then
backgroundPattern="${backgroundPattern:-0}"
dd if=/dev/zero of=$diskRoot1 bs=1M count=32
dd if=/dev/zero of=$diskRoot2 bs=1M count=32
dd if=/dev/zero of=$diskSwap bs=1M count=32
dd if=/dev/zero of=$diskData bs=1M count=32
badblocks -swf -b 1048576 -t ${backgroundPattern} ${disk} 16 0
sync
sleep 2
parted $disk --align optimal <<EOP
mklabel gpt
mkpart primary 528M 2576M
mkpart primary 2576M 4624M
mkpart primary 16M 528M
mkpart primary 4624M -1M
set 1 raid on
set 2 raid on
quit
EOP
sync
sleep 1
#blocksize 65536 is required by the hardware, you won't be able to mount if different.
mkfs.ext4 -b 65536 -m 0 $diskData
echo
read -p "destroying was done, would you like to continue with installation? [y] " -n 1
echo -e
if ! [[ $REPLY =~ ^[Yy]$ ]]; then
exit 1;
fi
fi
#write the image to the raid disk
echo
sync
mdadm --create $rootfsRaid --verbose --metadata=0.9 --raid-devices=2 --level=raid1 --run $diskRoot1 missing
mdadm --wait $rootfsRaid
sync
sleep 2
mkfs.ext3 -c -b 4096 $rootfsRaid
sync
sleep 2
mdadm $rootfsRaid --add --verbose $diskRoot2
echo
echo -n "synchronize raid... "
sleep 2
mdadm --wait $rootfsRaid
sync
echo -e "done\n"
echo "copying image to disk... "
dd if=$image_img of=$rootfsRaid
mount $rootfsRaid $rootfsMount
cp $rootfsMount/usr/local/share/bootmd0.scr $rootfsMount/boot/boot.scr
echo "enabled" > $rootfsMount/etc/nas/service_startup/ssh
sync
sync
sync
umount $rootfsMount
rmdir $rootfsMount
mdadm --stop $rootfsRaid
./swap $diskRoot1
./swap $diskRoot2
rm ./swap
echo
echo "all done! device should be debricked!"
echo
