Replacing drives, which option is better or faster?

[Stux]

@rdcustom

okay, i will go with the safest option then, i have two ports still available

Which means you can safely replace two drives at a time

Btw, you may be interested in this post on parallel resilvers

Any way to force simultaneous replacements to happen in parallel?

I have noticed this too. I do recall it working in parallel in the past, but its certainly serial these days. I suspect the behaviour may have changed when “Sequential Re-silvering” was added to ZFS. And yes… And good news, is apparently there’s a solution You’re hitting the resilver_defer feature, which attempts to prevent restarting if another disk faults in the middle of a resilver, but mostly surprises people who try to resilver multiple things at once. See #14505 for a discussion. …