topic Re: How does a controller behave after an electrical failure while in &quot;system power off&quot; state in ONTAP Hardware https://community.netapp.com/t5/ONTAP-Hardware/How-does-a-controller-behave-after-an-electrical-failure-while-in-quot-system/m-p/11625#M796 <HTML><HEAD></HEAD><BODY><P>Thank you</P><P></P><P>Regis</P></BODY></HTML> Thu, 24 Jan 2013 13:14:24 GMT REGIS_GARRUCHET 2013-01-24T13:14:24Z How does a controller behave after an electrical failure while in "system power off" state https://community.netapp.com/t5/ONTAP-Hardware/How-does-a-controller-behave-after-an-electrical-failure-while-in-quot-system/m-p/11615#M794 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>I did not find an answer neither in doc nor in the forums.</P><P></P><P>My question is quite simple. What does happen when a controller is in such a situation ?</P><P>- The controller has been halted with an "halt -f" command</P><P>- From the SP, the following command has been executed: "system power off", so the motherboard has no more power supply, but SP is still active.</P><P>- There is an electrical failure, so all PS supply is interrupted, including to shelves and SP module.</P><P></P><P>What does happen when power comes back ?</P><P>- Is there an auto boot ?</P><P>- Or does the SP interrupts the boot to be in the exact same state than before the failure ?</P><P></P><P>I believe, it will do an autoboot as usual and as soon as disks are back, but I need to be sure (and my customer too).</P><P></P><P>Thank you for your answers.</P><P></P><P>Régis</P></BODY></HTML> Thu, 05 Jun 2025 06:11:31 GMT https://community.netapp.com/t5/ONTAP-Hardware/How-does-a-controller-behave-after-an-electrical-failure-while-in-quot-system/m-p/11615#M794 REGIS_GARRUCHET 2025-06-05T06:11:31Z Re: How does a controller behave after an electrical failure while in "system power off" state https://community.netapp.com/t5/ONTAP-Hardware/How-does-a-controller-behave-after-an-electrical-failure-while-in-quot-system/m-p/11620#M795 <HTML><HEAD></HEAD><BODY><P>Yes, it will autoboot.</P></BODY></HTML> Thu, 24 Jan 2013 12:44:47 GMT https://community.netapp.com/t5/ONTAP-Hardware/How-does-a-controller-behave-after-an-electrical-failure-while-in-quot-system/m-p/11620#M795 aborzenkov 2013-01-24T12:44:47Z Re: How does a controller behave after an electrical failure while in "system power off" state https://community.netapp.com/t5/ONTAP-Hardware/How-does-a-controller-behave-after-an-electrical-failure-while-in-quot-system/m-p/11625#M796 <HTML><HEAD></HEAD><BODY><P>Thank you</P><P></P><P>Regis</P></BODY></HTML> Thu, 24 Jan 2013 13:14:24 GMT https://community.netapp.com/t5/ONTAP-Hardware/How-does-a-controller-behave-after-an-electrical-failure-while-in-quot-system/m-p/11625#M796 REGIS_GARRUCHET 2013-01-24T13:14:24Z