Hi All

I have upgraded (clean install though) my existing home server from Debian 7.0 to 8.0. This server has a few hard drives; Two of them are only used for nightly backup jobs (Dirvish fwiw). Hence, I want them to go to standby after Dirvish is done.

In Wheezy, both drives would spindown after Dirvish was done (hdparm -C would show "standby"); spindown time was set with hdparm -S 120 (10minutes); in hdparm.conf: spindown_time = 120.

More important (to me), I did understand the HDD behavior in Wheezy.

And then I moved to Jessie...
- Both drives will never go to standby by themselves.
- When I force both drives to standby (hdparm -y), HDD#1 will remain in standby till Dirvish kicks in. HDD#2 will become "active/idle" after ~15minutes or so.

What does this tell me?
HDD#1 is not accessed, but somehow it doesn't want to go to standby.
HDD#2 seems to be accessed, but I cannot reason by what (it is only used by Dirvish). I have checked syslog & lsof and I cannot find any traces which indicates that some process is accessing HDD#2.

What have I done so-far:
- uninstalled mlocate
- disabled smartd (although it was set to not bother the drives when drives are in standby with -n standby in smartd.conf)
- Manually issued "hdparm -S 120" to both drives

GUI is disabled by default; normal usage is SSH logon only. No GUI/greeter running. Only text logon screen on console.

Any suggestions/clues which I can invest further? I have spend quiet some time on this...getting clueless.

Thanks
Hans