/dev/hda {
   spindown_time = 60
}

/dev/hdb {
   spindown_time = 60
}

/dev/hdc {
   spindown_time = 60
}

$ sudo smartctl -i -n standby /dev/sdb
smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.13.0-37-generic] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     WDC WD40EFRX-68WT0N0
Serial Number:    WD-WCC4EFSNCNX5
LU WWN Device Id: 5 0014ee 26020b658
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
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-2 (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Wed Oct 22 05:31:21 2014 MSK
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
Power mode is:    ACTIVE or IDLE