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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.
Yes... I would like to have purchased the Pro drives instead, but as always cost is an issue. I just didn't expect this.
So it sounds like I should defrag first, then. Do you agree?
Here's my current schedule:
Scrub: 1/1;4/1;7/1;10/1
Defrag: 2/1;5/1;8/1;11/1
Balance: 3/1;6/1;9/1;12/1
Test: Day 2 of every month
What would you recommend? Also: will it be safe to simply cancel the current scrub, should I determine to alter the order of these?
Thanks,
Jeff Bowman
Fairbanks, Alaska
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.
> no such engine exists for RAID6 on the RN104 CPU
What about the RN204?
Also, do you have any suggestion for my prior question, re: order of actions?
Thanks,
Jeff Bowman
Fairbanks, Alaska
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