Problem with second SATA drive

view story

https://bbs.archlinux.org – My laptop has two hard drive bays, and just recently I added a second SATA drive (moved it from my old laptop) to the extra bay.Now, anytime the second hard drive /dev/sdb has any heavy disk activity, it appears to cause a shutdown of the SATA port for the first drive (/dev/sda)!  Though the second drive is still fine, and I can still write to it until the system crashes from the root drive (on /dev/sda) being shutdown.If I don't mount and use the second drive, the first drive works just fine, and I can pound it with traffic without issue.I can reproduce this problem by copying large (HowTos)