Why do my HDDs do NOT spin down ?

[drnicolas]

None of my HDDs does the expected spin-down after 20minutes

What can I do ?

[alexey123]

ZFS and spinning down disks ??? Hmmm is this possible ?

[drnicolas]

I don't know. That's why I am asking ....

Actually, I think, I had my HDDs spin down for moments using ataidle -S commands.
But I am not sure. The HDDs are quite silent.

[xuesheng]

None of my HDDs does the expected spin-down after 20minutes

Have you enabled SMART monitoring? By default NAS4Free's SMART monitoring checks the disks every 30 minutes and this can cause the disks to spin up.

The Disks|Management|S.M.A.R.T. page in the UI offers the following "Power Mode" options:

Never - Poll (check) the device regardless of its power mode. This may cause a disk which is spun-down to be spun-up when it is checked.

Sleep - Check the device unless it is in SLEEP mode.

Standby - Check the device unless it is in SLEEP or STANDBY mode. In these modes most disks are not spinning, so if you want to prevent a laptop disk from spinning up each poll, this is probably what you want.

Idle - Check the device unless it is in SLEEP, STANDBY or IDLE mode. In the IDLE state, most disks are still spinning, so this is probably not what you want.

[dnar]

If the posts above dont help, how are the drives connected?

Some controller cards dont support passthrough commands required for spindown.

[alexey123]

If you want "clean test" for disk spinning - not open webgui. Only ssh connect and check disks by hand

[drnicolas]

I have a HP N54l.
The HDDs are connected to the internal Controller, but not used as RAID.
The RAID is done by ZFS