I have tried setting all 3 to cable select, that has no effect I will try to set it to master now

The plug in the middle of the ribbon cable should always be set to Slave and the one at the end should always be Master.

Master end of the cable is plugged in. HDD is set to master and the one DVD drive which is connected atm is set to slave.
Still does not work.

That's a little bit odd. I've PMed the Tech team.

Thanks for your help. I do appreciate this.

This is how it is atm:

Hd set to master, connected by master end of cable.

1 DVD drive set to cable select (model:LG GSA-H10A). If this one is connected along with the HDD the system boots into windows (although a little slowly).

1 DVD drive set to slave (model:Gigabyte GOB5232D). I have tried setting this one at master, slave and cable select. It's when this one is connected that the sytem hangs at detecting array.

Whether it's faulty or not I don't know, it was working fine this morning.

Again, thnaks for your help.

Try putting the DVD drives both on one cable, the one at the end set to Master and the one in the middle set to slave. Let the HDD be on its own on the other cable.