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bitrot data securtity with ZFS but without a RAIDZ

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Hello,

my question is not necessary bound to FreeNAS/ZFS, more to filesystems in general. I ask it here because i hope that here a lot of ppl with filesystem expertise around.

short story:
Is there a way to store redundancy/parity information (like PAR2 generates) on the same disk as the data automatically and have it used automatically if necessary (like the "copies" parameter of ZFS, but more space efficient)?

long story:
I recently decided that i want to protect my data (99% media, 1%...

bitrot data securtity with ZFS but without a RAIDZ

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