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e3ace39
(Get the code!)
Can confirm that the SMART polling by udisk2 every 10 mins appears to reset the sleep timer on all of my disks: So all disks are kept awake by SMART polling where sleep timer > 10 mins. As previously stated later WD disks have a minimum sleep timer of 10 mins ( hdparm -S120 /dev/sdx) defaults to 10 mins for any value of S below 120. Therefore you need to choose betwen SMART monitoring and sleep.
Device Model: SAMSUNG HD154UI
Device Model: SAMSUNG HD154UI
Device Model: SAMSUNG HD204UI
Device Model: ST2000DL003-9VT166
Device Model: WDC WD40EZRX-00SPEB0
|Polling does not WAKE disks, so setting sleeptimer to less than 10 mins allows all above disks apart from WD to spin down. Following successful spindown they stay down. 12.04 seems to rely on smartmontools and smartd, and has a default of 30mins, so I had not seen this till upgrade to 14.04.