I have 3x22 TB drives in a RaidZ1 pool with roughly 20TB of data and a scrub takes 18 hours. This sounds about right to me tbh.
replyVDEVs:
replyData VDEVs - 4 x MIRROR, 2 wide, 12.73TB; Log VDEVs - 1 x DISK, 14.91TB, 1 wide; Cache VDEVs - 1 x 447.13 GiB
HW:
8 x WDC_WD140EFGX-68B0GN08; 2 x Micron_5300_MTFDDAK480TDS
Total space is 50.81TB of which 24.16TB is used. Frag on pool is reported at 21%.
Last Scrub took 11 hours 45 minutes 50 seconds.
Mine are WD Red Pros. I also have a 2TB WD Black SSD as a cache VDEV for the pool.
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