Usually you can tell if dropping began by analyzing dmesg | head. While this may have happened in your case, I doubt it did actually happen. In a long-running OS the entries relevant in the context of the linked answer may have already been dropped (they may still be in /var/log/kern.log or similar log). If the buffer is full then new entries will make the buffer drop old entries. What dmesg prints is a buffer and its size is limited.In your case this reason apparently does not apply: if you needed sudo, you would get a clear error ( operation not permitted or so), not the line you got. From these lines one can easily tell the sizes of my disks.ĭmesg | grep blocks may print nothing like these and the reason(s) may be: What I did not omit is the part I think the author of the linked answer had in mind. It's not the entire output, I omitted few irrelevant lines. When I run dmesg | grep blocks in my Kubuntu 18.04.5 LST, the output is like: sd 0:0:0:0: 234441648 512-byte logical blocks: (120 GB/112 GiB)
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