For the community: as of 11.1-5 there is no built-in GUI for drive temps. But you can run this at the cmd line.
freenas-debug -S | grep "Temperature_"
My WD Reds, Dont appear to update the VALUE and WORST fields correctly, but looking at the RAW_VALUE in the last field appears to be correct.
e.g. Current = 122 and Worst = 112. Wrong!
RAW_VALUE = 28
root@freenas:~ # freenas-debug -S | grep "Temperature_"
194 Temperature_Celsius 0x0022 122 112 000 Old_age Always - 28
194 Temperature_Celsius 0x0022 122 112 000 Old_age Always - 28
194 Temperature_Celsius 0x0022 120 111 000 Old_age Always - 30
194 Temperature_Celsius 0x0022 120 111 000 Old_age Always - 30
194 Temperature_Celsius 0x0022 122 112 000 Old_age Always - 28
194 Temperature_Celsius 0x0022 121 112 000 Old_age Always - 29
194 Temperature_Celsius 0x0022 121 111 000 Old_age Always - 29
root@freenas:~ #
Also, thanks to
@Pitfrr for the link. These are the ave temp by drive type.
Model Avg. Temp (C)
Western Digital Red (WDC WD30EFRX) 23.05
Seagate Barracuda LP (ST31500541AS) 21.92
Seagate Desktop HDD.15 (ST4000DM000) 22.10
Seagate Barracuda Green (ST1500DL003) 22.86
Seagate Barracuda LP (ST32000542AS) 23.27
Western Digital Caviar Green (WDC WD30EZRX) 23.46
Seagate Barracuda 7200.14 (ST3000DM001) 24.71
Western Digital Caviar Green (WDC WD10EACS) 25.23
Seagate Barracuda XT (ST33000651AS) 25.40
Hitachi Deskstar 5K4000 (Hitachi HDS5C4040ALE630) 25.42
Seagate Barracuda 7200.11 (ST31500341AS) 25.73
Toshiba DT01ACA Series (TOSHIBA DT01ACA300) 25.82
Hitachi Deskstar 5K3000 (Hitachi HDS5C3030ALA630) 26.46
Hitachi Deskstar 7K3000 (Hitachi HDS723030ALA640) 26.75
HGST Deskstar 7K4000 (HGST HDS724040ALE640) 27.22
Hitachi Deskstar 7K2000 (Hitachi HDS722020ALA330) 27.39
HGST Megascale 4000 (HGST HMS5C4040ALE640) 27.84
Western Digital Caviar Green (WDC WD10EADS) 27.93
Seagate Barracuda XT (ST4000DX000) 30.54
So, im running a bit hot due to my passive cooling system using a UCoustic rack.