On 2020-09-26 18:29, Dr. Nikolaus Klepp wrote:

> did you do a "sync" afterwards and waited till it returned? If not,
> then the image was not written completely. You can monitor the writing
> process with "watch iostat" (if you have sysstat installed)

Or run dd with oflag=direct. I also try to smooth out the timing with
something like mbuffer whenever these FSCKing flash devices are
involved. Cf:

http://very.loosely.org/itz-blog/reading-sd-cards-safely.html

--
Ian