I've got a mybookworld 2x500GB device that had a failed drive. I bought a new WD 1TB drive, with the same amperage and voltage specs and replaced it.
The first time, I used the web interface to format the drive but the syncing process did not complete withing 4 days.
Then I removed the new drive, zeroed it and connected it again. This time I tried to repair the RAID myself. I formated the new drive with the same partitions as the ones in the original (not the faulty) drive. Then I started adding the new partitions to the md devices. Everything worked out fine and without errors for the first three partitions. I left the last one for later because it is the larger one and it would take some time.
Then, I shut the device down and when I power it on there is no LED indication. I can hear the disks spin up but the device does not appear to be working.
Any ideas on what the problem might be?