Power saving with a Proliant server

Posted on 2008-11-08
Last Modified: 2012-05-05
We are going through a stage of power cost review and have decided to turn a number of servers off automatically overnight.
One such server is a HP ML350 G4P which is running Linux.  We power it off using a script.

Is there anyway we can get the server to turn itself back on at a specific time in the morning to save someone having to go and press the switch?

Question by:sheepfarmer
    LVL 57

    Assisted Solution

    by:Pete Long
    Hello sheepfarmer,

    Either use Power on LAN or turn it on with its inbuilt iLO card?



    Author Comment

    Can either method be automated (internally or from another machine)?

    Also, how does Power on LAN actually work?

    LVL 57

    Accepted Solution

    WOL can be automated from a script on another machine

    Author Comment

    Thanks PeteLong - All working now using WOL.

    One interesting thing I found out was that the default installation of Fedora (Core 4 in my case) it not configured for WOL, which means when do you a shutdown -h now, the LAN card is actually turned off and not left in a state to accept future WOL magic packets.

    The fix was to add
    ETHTOOL_OPTS="wol g"


    Thanks a lot for the info.

    LVL 57

    Expert Comment

    by:Pete Long

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