3 ms·
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
by ssl-3 10mo 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.)
- agapon 10mo agoWith HDDs, it's also mechanical wear and increased chance of a failure. SSDs are not fully immune to increased load either.
- ssl-3 10mo agoIs 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?
- rcxdude 10mo agoYes. Hard drives have published "Annualized Workload Rate" ratings, which are in TB/year, and the manufacturers state there is no difference between reads and writes for the purpose of this rating. (https://www.toshiba-storage.com/trends-technology/mttf-what-hard-drive-reliability-really-means/ https://www.toshiba-storage.com/trends-technology/mttf-what-...) For SSDs, writes matter a lot more. Reads may increase the temperature of the drive, so they'll have some effect, but I don't think I've seen a read endurance rating for an SSD.
- digiown 10mo agoReading from it requires the read head to move, as opposed to spinning idle where the heads are parked on the side. Moving parts generally wear out over time.