I observe this very behavior on 7.0: smartd logs:
Device: /dev/sdc [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 117 to 116 but according to `smartctl --all /dev/sdc`: ~~~~ smartctl 7.0 2018-12-30 r4883 [x86_64-linux-4.19.0-5-amd64] (local build) Copyright (C) 2002-18, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Family: Western Digital Red Device Model: WDC WD60EFRX-68L0BN1 [...] Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 194 Temperature_Celsius 0x0022 116 095 000 Old_age Always - 36 ~~~~ Package: smartmontools Version: 7.0-1 --- System information. --- Architecture: Kernel: Linux 4.19.0-5-amd64 Debian Release: 10.1 -- Best wishes, Dmitry Smirnov --- There is no such thing as public opinion. There is only published opinion. -- Winston Churchill
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