smartctl 6.4 2014-10-07 r4002 [x86_64-linux-4.9.0-0.bpo.12-amd64] (local build)
Copyright (C) 2002-14, Bruce Allen, Christian Franke, www.smartmontools.org

/dev/sg2: Device of type 'scsi' [SCSI] detected
/dev/sg2 [SAT]: Device open changed type from 'scsi' to 'sat'
/dev/sg2 [SAT]: Device of type 'sat' [ATA] opened