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Re: kern/55189: NVMe SSD reports unsafe shutdowns

 sudo smartctl -d nvme,0x1 -a /dev/nvme0

The output was mostly as expected, but one item stood out:

 Unsafe Shutdowns:                   68

This is only two less than the reported number of power cycles,
and appears to increase by one for each power cycle, even after
applying the patch from PR 54969.  The machine is typically
powered off by running "halt -p".

I've got similar results on my "Samsung SSD 960 PRO 512GB":

   Power Cycles:                       32
   Power On Hours:                     16,890
   Unsafe Shutdowns:                   30

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