Thanks a lot for your answer !
I receveived yesterday another Power cable to supply the new bay.
Everything seems working well now !
I just connect 3 HD and the 3 are working well.
The acces panel doesn t fit well, i ll need to cut part of it and readjust a bit ^^
The drive cage was a 8SFF, now 12LFF.
I have 2 powers supply of 450 W each, do you think is enought to supply 12 HDD? I just tested now with 3, and I m wondering if I need to upgrade them ?
Do you think if I plug 10 HD I ll need to upgrade any other thing? like a raid card? or something else ?
( sorry I m a Noob !)
Thanks for you help !