does anyone get such message just after the os boot : << .................................................................... ....................................................................

NetApp Release 6.5.2R1: Wed Sep 8 17:00:29 PDT 2004 Copyright (c) 1992-2004 Network Appliance, Inc. Starting boot on Fri Sep 24 12:58:19 GMT 2004 Sensor PS_1_Present is failing to operate! Sensor PS_2_Present is failing to operate! ... <normal boot>

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i don't know if this is related to a bug in Ontap a problem in the mother board or a misconfiguration between 652 and old F7XX power supply (this appeared on an F740)

environment commands show no problems powersupply at the rear are ok unplugging a PS generate an alert normally