Hard drive only works in 1st tray
I have a 2010 tower, new to me, 16 gb RAM, came with a single drive in Tray 1, boots up fine, but cannot get computer to recognize any working drives in tray 2-4. The drives work fine in my older 2006 tower and off USB in the newer computer---the SATA connections seem to be mating okay, though sleds 2 and 4 seem to require a little more of a push. Is there a setting somewhere that needs to be adjusted?
Mac Pro