Downgrade My Book World firmware to 01.01.18

Newer not always is better.
I upgrade my firmware of My Book World (West Digital) from 02.00.15 to 02.00.18, and I noticed a significant speed drop and increased un-stability during file transfer!!!!
Trying to downgrade to 02.00.15, but failed!
So, I decided to go back to 01.01.18.

Thanks to this outstanding post. I only used part of it, which preserve my data in the forth partition.

Here is what I did:

1. Remove the HDD from MyBook World Edition (PDF howto, involving 8 screws) and connect it to your PC by SATA adapter. I refer to the disk as /dev/sdb

2. Download the rescue files (57 MB), which was created with 01.01.18 firmware.

wget http://szabados.sk/mybook_we_rescue.zip
unzip mybook_we_rescue.zip
cd rescue

3. Unpack and copy the contents of the rescue images to the first three partitions in the hard drive. This is a extremely dangerous step. Please make sure all the device is spell correctly and appropriately.

bunzip2 <SDA1_IMA.BZ2 >/dev/sdb1
bunzip2 <SDA2_IMA.BZ2 >/dev/sdb2
bunzip2 <SDA3_IMA.BZ2 >/dev/sdb3

4. Turn off fsck for all NON-SWAP partitions

tune2fs -c -1 -i 0 /dev/sdb1
tune2fs -c -1 -i 0 /dev/sdb3
tune2fs -c -1 -i 0 /dev/sdb4

5. Edit /etc/fstab for correctly mount the data partition /dev/sdb4.

mkdir temp
mount -t ext3 /dev/sdb1 temp
nano temp/etc/fstab

/dev/md4 MUST BE REPLACED BY /dev/sda4!
Save it.

umount temp

6. Power off the hard drive, and plug the drive back to My Book World. After rebooting, the system is happily running with a firmware 01.01.18 now. :-)

And, it is a good time to do some tweaking to the system. My previous post "Some updated notes about WD My Book World NAS" is a good starting howto.