Comment by ssl-3
4 hours ago
The cost of a scrub is just a flurry of disk reads and a reduction in performance during a scrub.
If this cost is affordable on a daily basis, then do a scrub daily. If it's only affordable less often, then do it less often.
(Whatever the case: It's not like a scrub causes any harm to the hardware or the data. It can run as frequently as you elect to tolerate.)
With HDDs, it's also mechanical wear and increased chance of a failure. SSDs are not fully immune to increased load either.
Is there any evidence that suggests that reading from a hard drive (instead of it just spinning idle) increases physical wear in any meaningful way? Likewise, is there any evidence of this for solid-state storage?