If you have ever wondered how S.M.A.R.T. output of a failing hard drive looks like

# smartctl -l selftest /dev/sdb
smartctl 7.4 2023-08-01 r5530 [x86_64-linux-6.12.4-arch1-1] (local build)
Copyright (C) 2002-23, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Extended offline    Completed: read failure       90%     29550         3432497913
# 2  Conveyance offline  Completed: read failure       70%     29550         3432490825