I get that using hot virtual spares is much better, I also wonder at a week to write 12tb. 12tb at 200 mb/s is roughly 20 hours. Is it the fact that you get 12

I get that using hot virtual spares is much better, I also wonder at a week to write 12tb. 12tb at 200 mb/s is roughly 20 hours. Is it the fact that you get 12tb of essentially non sequencial io mixed with random reads during the rebuild? Still 20 mb/s seems 1990s slow writing tio a mechanical HD? Ed: ok, ok, from tfa: > For 14 wide RAID-Z2 vdevs using 12TB spindles, rebuilds can take weeks. Resilver I/O activity is deprioritized when the system has not been idle for a minimum period. Full zpools get fragmented and require additional I/O’s to recalculate data during reslivering. Obviously writing 12 tb at 0 mb/s will take time..