is it unusual to repeatedly have 0 checksum errors? On one hand, no errors seems like a good thing

On the other hand, I have 30ish TB split between 10 disks in raidz2 and havent seen a checksum error in a month; and a little voice in the back of my head keeps asking "what if scrub isnt working right and is just missing all the errors?"

Am I just being paranoid? Or is this unusual given the amount of data and the length of time without *any* checksum errors?

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**extra info**

disks are 10x 8tb toshiba N300's (raidz2) + a mirrored SLOG (uses 2x 4gb partitions from 2 separate intel optane drives)

checksums are sha512

OS is fedora 29 (though this pool is NOT the OS drive)

zfs version is ZoL 0.8.0.rc2_42 