fvdw-sl on WD My Cloud

[matt_max]

I've done all the steps:

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mdadm --stop /dev/md127 (because array was autoassemble on my linux machine)
mdadm --assemble --update-minor /dev/md0 /dev/sdb1 /dev/sdb2 (to recreate metadata with correct md0)
mkefs -t ext3 -m 1 /dev/md0 (to format partition)
mount -t ext3 /dev/md0 /mnt/wd
tar -xvf /p10rootfs.tar.gz -C /mnt/wd (to extract all files and directories)


Then I've checked that there was link /sbin/init -> /bin/busybox (and it has execute permissions). After that I've unmount partition

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umount /mnt/wd


...and stop array with

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mdadm --stop /dev/md0


After I reconnect disc to wd and start it - nothing has changed. There is still same error. Here is the output from terminal.

[fvdw]

Your tar command is wrong you should use

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tar -xzvf ...

as it is a gz compressed archive.
As result the archive is not extracted properly

[matt_max]

It doesn't really matter. When I repeat all steps and extract file with tar -xzvf ... the output from console looks the same.

[fvdw]

odd... :scratch

Then we need to verify if my binaries can run on this kernel.

For that you need to put back the root fs of WD on /dev/md0
Also put the p10rootfss.tar.gz file in the root folder of the root file system of WD

Boot the the wdcloud and when it succeeds look if you can find the p10rootfs.tar.gz file.
If found make a folder with name /chroot
Extract the p10rootfs archive in this folder /chroot
Then perform this command

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chroot /chroot /etc/init.d/rcS

This should start a chrooted linux system. The output you get should be something like this

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root@fvdwsl-sg-pc:/ # chroot /chroot /etc/init.d/rcS
start rcS base wdcloud p10
mount proc
remount root file system rw
mount: can't find / in /proc/mounts
mount sysfs
start boot log
no boot partition sda1 or sda2 defined cannot load firmware
prepare telnet access
start telnet
------------------------
rcS-wdcloud base finished
------------------------
 list p10 boot.log file
start boot log
no boot partition sda1 or sda2 defined cannot load firmware
prepare telnet access
start telnet
rcS-wdcloud base finished
root@fvdwsl-sg-pc:/ #

If you don't get this output or error report goto folder /chroot/bin and execute

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./busybox --help

and see if it list the build in modules.
If that fails we have an issue..

[fvdw]

I modified the command

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chroot /chroot /etc/init.d/rcS

I mentioned /ets/init.d/rcS this must be /etc/init.d/rcS

[matt_max]

I'm sorry but still no luck:

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WDMyCloud:/# chroot /chroot /etc/init.d/rcS
Killed
WDMyCloud:/# chroot /chroot
chroot: failed to run command `/bin/bash': No such file or directory


[fvdw]

that is a problem from wd firmware not finding bash
Lets first test the binary
Did you try the command

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cd /chroot/bin
./busybox --help

[matt_max]

It is some problem with binary:

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WDMyCloud:/# cd /chroot/bin/
WDMyCloud:/chroot/bin# ./busybox --help
Killed
WDMyCloud:/chroot/bin#


[fvdw]

mmm...lets see if you have ldd command
inside /chroot/bin

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ldd busybox

should give this

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root@fvdwsl-sg-pc:/chroot2/bin # ldd busybox
        libm.so.6 => /lib/libm.so.6 (0xb6f09000)
        libtirpc.so.1 => /usr/lib/libtirpc.so.1 (0xb6ee5000)
        libc.so.6 => /lib/libc.so.6 (0xb6da9000)
        /lib/ld-linux.so.3 (0xb6fb8000)
        libnsl.so.1 => /lib/libnsl.so.1 (0xb6d8d000)
        libpthread.so.0 => /lib/libpthread.so.0 (0xb6d6d000)
root@fvdwsl-sg-pc:/chroot2/bin #

[matt_max]

Even strace is not very helpful here:

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WDMyCloud:/chroot/bin# strace -f ./busybox
execve("./busybox", ["./busybox"], [/* 20 vars */] <unfinished ...>
+++ killed by SIGKILL +++
Killed


But this file looks ok to me:

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WDMyCloud:/chroot/bin# file busybox
busybox: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.16, stripped
WDMyCloud:/chroot/bin#


And ldd is even stranger:

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WDMyCloud:/chroot/bin# ldd  ./busybox
        not a dynamic executable
WDMyCloud:/chroot/bin#


What is going on here :dontknow