I installed bananian and the sata was deteched, using the same setup wrt to power supply and sata drive, interesting.
uname -a
Linux bananapi 3.4.111-bananian #5 SMP PREEMPT Fri Mar 25 17:24:42 UTC 2016 armv7l GNU/Linux
# dmesg | grep scsi
[ 1.695948] scsi0 : sw_ahci_platform
[ 3.755632] scsi 0:0:0:0: Direct-Access ATA Samsung SSD 850 EXM0 PQ : 0 ANSI: 5
[ 15.887345] sd 0:0:0:0: Attached scsi generic sg0 type 0
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 477G 0 disk
└─sda1 8:1 0 477G 0 part
mmcblk0 179:0 0 1.9G 0 disk
├─mmcblk0p1 179:1 0 20M 0 part
└─mmcblk0p2 179:2 0 1.8G 0 part /
not sure this is a power supply issue.
Thanks
Fred