Thank you @dcsapak. Here is the result of my smartctl investigation:
# smartctl -t short /dev/sdc
# smartctl -a /dev/sdc
smartctl 7.2 2020-12-30 r5155 [x86_64-linux-5.11.22-2-pve] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org
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