There are 4 harddisk drives on my FreeNAS box. All are toshiba SATA drives.

• 2 drives are TOSHIBA MD04ACA600, and
• 2 drives are TOSHIBA MG05ACA800E.

Before FreeNAS 11.2-U5, one of the TOSHIBA MD04ACA600 reported "N/A" on the "Disks in Use" widget of the dashboard most of the time but once in a while all four reported proper temporature.

After I have installed FreeNAS 11.2-U5, the 2 TOSHIBA MD04ACA600 drives reports temporature properly all the time but the 2 TOSHIBA MG05ACA800E drives always report "N/A".

All drives returns the value of 194 Temperature_Celsius, SMART Attributes Data Structure properly with command smartctl.