Hi guys and thanks a lot for your quick answers. My appologies for responding so late, but I've been on vacation...
To respond to some of you:
One filer that reports the aforementioned errors has this vesion of ONTAP
NetApp Release 7.0.5: Wed Aug 9 00:27:38 PDT 2006
The other :
NetApp Release 7.0.5: Wed Aug 9 00:27:38 PDT 2006
Despite being THAT old they work flawlessly, but if it's a known bug that generates these messeges than I suppose it won't be a problem to upgrade to the latest stable version. Concerning what Mathew said, I don't see any particular errors when sifting through the output (except for what I've already noted):
environment status | grep -i "status" | grep -v normal
PSU Status ok
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Shelf status: critical condition
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574360; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Shelf status: critical condition
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
Status reads attempted: 3574361; failed: 0
environment status | egrep -i "failed|err"
Status reads attempted: 3574416; failed: 0
Control writes attempted: 41; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 45; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 40; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 84; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 21; failed: 0
Power Supply installed element list: 1, 2; with error: 2
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 16; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 25; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 20; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 17; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574415; failed: 0
Control writes attempted: 13; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 12; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 12; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 24; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 67; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 95; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 207; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 18; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 17; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 23; failed: 0
Power Supply installed element list: 1, 2; with error: 1
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 53; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 183; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 443; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 141; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none
Status reads attempted: 3574416; failed: 0
Control writes attempted: 746; failed: 0
Power Supply installed element list: 1, 2; with error: none
Cooling Element installed element list: 1, 2; with error: none
Temperature Sensor installed element list: 1, 2, 3; with error: none
ES Electronics installed element list: 1, 2; with error: none
Embedded Switching Hub installed element list: 1, 2; with error: none