After reading through the boot info. script that you posted I see that all of your Windows partitions are on sda on your first hard disk drive that the system see's.
Your second drive has multiple partitions and 3 different distro's (Ubuntu, Mageia and Debian) and only one swap partition.
/dev/sdb2 is Ubuntu 14.04
/dev/sdb3 Is an Extended partition
/dev/sdb5 is Mageia
/dev/sdb6 is a swap partition (in association to which distro I don't know)
/dev/sdb4 is Debian 7
How your Windows partition made it onto your second drive is unknown to me.
I would leave that partition alone.
If this were my machine
I would start all over again and before installing any distribution I would open the tower and unplug the 1 TB drive so that there is no confusion as to which drive to install to.
With your second drive being a 250 GB HDD I wouldn't install more than 2 distributions.
I'm not sure if triple booting is wise with a HDD of that size.
Install one distribution at a time making a 'ext 4' journaling file system and a 1 GB linux-swap partition.