ext4 error messages

[jd1008]

I have an external esata HD (the WD20NPVX) connected to the laptop
via an esata cable to the esata port of the laptop.

I am getting ext4 errors for that device (/dev/sdb3 which is only 
mounted partition on that drive),
and even getting ext4 errors on /dev/sda3 which is the root partition.

Both /dev/sda and /dev/sdb are brand new (less than a couple of months old).

The error file is at

https://www.sendspace.com/file/ym076o

Thanx,

JD