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A very LONG scrub
I manually kicked off my first scrub about four hours ago. I'm running 4x4TB WDC Reds @ 5400 RPM on RAID6, resulting in a 7.27TB volume. These are my present stats, calculated in Excel: % ...
The scrub will speed up a bit once the filesystem portion of the scrub finishes. But it'll never be "fast" using RAID6 on a RN104. RAID5 can offload some parity calculation work to a specialized engine on the CPU, but no such engine exists for RAID6 on the RN104 CPU, and RAID6 is much more computationally intensive than RAID5. You'd probably have a better experience using RAID10 on RN104.
> RAID5 can offload some parity calculation work to a specialized engine
> on the CPU, but no such engine exists for RAID6 on the RN104 CPU
Hi Skywalker, what about the RN204?
Thanks,
Jeff Bowman
Fairbanks, Alaska
The RN204 has a dual-core CPU so whether or not it can offload tasks to a special engine it does have two cores to make use of. The RN214 has a quad-core CPU. Performance would be better with either of those.
The RAID itself would be limited to one core, but other things that are running on the NAS could make use of other cores minimising their impact on the scrub.
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