1.ata_id[634]: HDIO_GET_IDENTITY failed for '/dev/sdb'
From:https://bbs.archlinux.org/viewtopic.php?pid=1015693
Hello. I've just seen your post after Googling for the same error myself. (I boot and run from a usb hard disk.)
I found this helpful:
http://hyperois.com/support/index.php?_ … ticleid=18
When I performed
hdparm -i /dev/sdb
I did indeed get that error. I don't know which startup file/config is running that command, but it doesn't seem to be problematical and I'm ignoring the error message until I can be bothered to track it down!