root@synology:~# smartctl -i -n standby -d sat /dev/sda
smartctl 6.5 (build date Apr 2 2019) [x86_64-linux-4.4.59+] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Western Digital Red
Device Model: WDC WD40EFRX-68N32N0
Serial Number: WD-WCC7K0AHV7TL
LU WWN Device Id: 5 0014ee 266cae699
Firmware Version: 82.00A82
User Capacity: 4,000,787,030,016 bytes [4.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 5400 rpm
Form Factor: 3.5 inches
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-3 T13/2161-D revision 5
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Fri Jan 10 18:49:59 2020 CET
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
Power mode is: ACTIVE or IDLE