There is wrote that :...the problem can depend by the physic set up of the HD (as "master", "slave", "single drive", ...): this set up can be done by changing the position of a jumper on the HD...
I know that, in the past time, the HDs had to be set physically in this way.., but recently I never heart anymore that the modern HD need this operation..
So actually I don't care anymore of the configuration of the HDs
(my HD is Toshiba 1 TB that I bought few mounts ago).
I would like to have a confirmation that what I read in the post is only an obsolete information and, in any case, I would like to know also what I can do to go around in my problem..
From the command line: ls /dev/sd* I get:
give me this input :
/dev/sda /dev/sda1 /dev/sda2 /dev/sda5 /dev/sdb /dev/sdb1 /dev/sdb2