MyBook Essential Edition 3TB body: Change HDD to 2TB


I needed the 3TB hard disk of my My Book Essential Edition USB 3.0 for my NAS. 

Now I want to put a 2TB WD caviar green in the body of my 3 TB My Book.

But when I start my linux, it its not possible to read or write the disk in this MyBook body.

The 2TB hard disk is formatted with EXT3 and a 4KB sector size.

When I try to mount it in my linux it looks like this:

$ sudo mount -t ext3 /dev/sdb /media/ssh
mount: wrong fs type, bad option, bad superblock on /dev/sdb,
       missing codepage or helper program, or other error

When I  try to make a hard disk test with gparted I get this message:

Error benchmarking: helper exited with exit code 1: Error reading 104857600 bytes at 104857600 from /dev/sdb when guesstimating buffer size: Input/output error

Can anybody help me, how I have to prepare the 2TB disk, to use it in the MyBook USB3.0 body.

Thanks a lot!


I don’t think you are able to change the enclosure with another type of HD other wise the enclosure would have been sold separately.


Thank you for your answer.

I am not shure if there is a hardware lock, which locks this MyBook controller board  only for one type of 3TB harddisks. But the might be a “lock” for harddisks with less than 3TB?

Hello  Lawrence

Oh yes I see you were right. The controller is actually only for the used hard disk.


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