Sleep mode and waking up for scheduled recordings.

elsmandino · 5. April 2017

Hello,

I have spent quite some months tinkering with OMV now and gradually getting used to how it (and indeed Linux) works.

I now have TVHeadend running and recording all my programs.

There is just one more piece of the puzzle that I really need some advice/help with.

Although there are a lot of people that favour just leaving a server on all the time, it would be a wasteful for me to do this with my particular server.

No-one is at home from about 8 am to 6 pm and very few recordings are ever scheduled during this period.

How do I set up my serer so that it goes into sleep mode (suspends to RAM) after inactivity for 10 minutes but also wakes up for scheduled recordings on TVHeadend?

Any help would be really appreciated.

Thanks.

macom · 5. April 2017

there is a plugin called "wakealarm"
may be it does the trick
I am not using it

another option could be to use another device (e.g. your router) to wake the server using wake-on-lan (if the server supports WOL)

elsmandino · 7. April 2017

Thank you very much for that - had no idea that that particular plugin existed.

I have to say that I am particularly interested in your setup.

I love the way that you are using a passive board and power brick for your server - what case are you using with it?

macom · 7. April 2017

My case is a Cooler Master Elite 120 Advanced.

The idea comes from this site: http://www.technikaffe.de/anle…stplatten_auf_einen_blick

but from an earlier version.

I was first using FreeNAS with ZFS. At that time it was recommended to use 16GB of RAM. Later I was concerned by some discussions that it would be a bad idea to use ZFS without EEC ram. Though there was no clear conclusion I decided to switch not only the filesystem to ext4 but also the operating system to OMV, where the 16GB are probably not needed.

elsmandino · 7. April 2017

Thank you, Macom.

The reason I asked was that I have been really struggling with sleep mode on Linux.

I am now wondering whether I should consider the route of building a server from newer hardware, that is quite and efficient enough to be left on 24/7 instead (this would also sort out the WOL problems I have been having).

Do you have any idea what the power draw is?

macom · 7. April 2017

If I remember well and measured with a not calibrated power meter

turned off / WOL enabled: 3W
turned on, HDDs in Idle: 15W ( with an ASRock J3455-ITX they mention only 9W on technikaffe.de)
turned on, two HDDs spinning: 25W

macom · 7. April 2017

Have you visited the "My NAS build" section of the forum? There are some additional ideas.

elsmandino · 7. April 2017

Zitat von macom

If I remember well and measured with a not calibrated power meter

turned off / WOL enabled: 3W
turned on, HDDs in Idle: 15W ( with an ASRock J3455-ITX they mention only 9W on technikaffe.de)
turned on, two HDDs spinning: 25W

15w at idle (which is what state my server would be for about 50% of an everage day) is really impressive.

I was thinking of going down the pre-built server route but the idle wattage of this:

http://www.alphr.com/hp/32483/…t-microserver-gen8-review

but the idle wattage is twice that of yours.

I think I am going to have a look at the "My NAS build" section for some inspiration.

Jetzt mitmachen!