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https://www.smartmontools.org/ticket/680
Actually the ATA spec is the problem: The Life timestamp field is only 16 bit wide in both variants of the SMART self-test log. Overflow could only be detected if any old test with up to 65535 hours is still in the log. I'm not sure whether this is worth the effort for rare disks with a power on time of at least ~7.5 years.
https://unix.stackexchange.com/questions/177846/in-smartctl-output-what-does-lifetimehours-mean
For example I have two drives where LifeTime is a uint16 and rolls over after 65535 hours. sudo smartctl -A -l selftest /dev/sda | egrep '(Power_On|# 1)' 9 Power_On_Hours 0x0032 022 022 000 Old_age Always - 68380 # 1 Extended offline Self-test routine in progress 80% 2844 - …
https://www.smartmontools.org/ticket/12
The LifeTime? value in '-l selftest' output is not truncated by smartctl. The 'Life timestamp' field in the ATA Self-test log data structure is a 16 bit quantity. Same applies to '-l xselftest'. See tables A.13 and A.21 of T13/1699-D Revision 6a.
https://www.truenas.com/docs/core/tasks/smarttests/
Long - runs SMART Extended Self Test. This will scan the entire disk surface and can take many hours on large-volume disks. Short - runs SMART Short Self Test (usually under ten minutes). These are basic disk tests that vary by manufacturer. Conveyance - runs a SMART Conveyance Self Test. This self-test routine is intended to identify damage incurred during transporting of the device.
https://serverfault.com/questions/843300/out-of-order-lifetimes-in-smart-self-test-log
I was peeking at a server's SMART log, and noticed this (emphasis mine): SMART Self-test log structure revision number 1 Num Test_Description Status Remaining LifeTime(hours) Stack Exchange Network Stack Exchange network consists of 178 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn ...
https://www.tenforums.com/tutorials/163843-how-check-drive-health-smart-status-windows-10-a.html
The raw value of this attribute shows total count of hours (or minutes, or seconds, depending on manufacturer) in power-on state. "By default, the total expected lifetime of a hard disk in perfect condition is defined as 5 years (running every day and night on all days). This is equal to 1825 days in 24/7 mode or 43800 hours."
https://serverfault.com/questions/296024/does-this-smart-selftest-indicate-a-failing-drive
4. It would be much more helpful if you ran smartctl -a /dev/sde and posted the section labeled SMART Attributes Data Structure which contains raw counters. In particular the very first one in there is Raw_Read_Error_Rate which is the best "bad drive" indicator (and will probably be !0 in your case). – Chris S.
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