>> It's worse than this. Consider the read-only clients. When you
>> access a filesystem object (file, directory, etc.), UFS will write
>> metadata to update atime. I believe that there is a noatime option to
>> mount, but I am unsure as to whether this is sufficient.
>Is this some particular build or version that does this? I can't find a
>version of UFS that updates atimes (or anything else) when mounted
No that is clearly not the case; read-only mounts never write.
They just cache too much, too long and that is sufficient for them to
never see data or max stale and live data, corrupting the outcome of
whatever process is using that data, including possible the kernel.
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