[SOLVED] Detach Disk from RaidZ1

Can you explain me this, what mean replacing does this is running a while or should I do something
 

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Your Pool ist resilvering which in RAID is often called rebuilding.

After it's done it'll remove the old device. You can see the progress on top.
 
Thanks @H4R0 for pointing out, i didn't catch that.
Seems like they're Seagate SAS Exos drives with 2.4TB.

I'm taking a guess here by saying, that those drives are usually pretty reliable, but even if a double disk failure is likely to occur
which would destroy the pool. A triple disk-failure however is highly unlikely to occur.
However, if the pool is being used 80%, resilvering will take a bit of time too in an productive environment, so you should really consider
setting the pool up again with RAID-Z2 or Z3 and, of course, have a backup. Because RAID in any kind isn't.
 
Thanks @H4R0 for pointing out, i didn't catch that.
Seems like they're Seagate SAS Exos drives with 2.4TB.

I'm taking a guess here by saying, that those drives are usually pretty reliable, but even if a double disk failure is likely to occur
which would destroy the pool. A triple disk-failure however is highly unlikely to occur.
However, if the pool is being used 80%, resilvering will take a bit of time too in an productive environment, so you should really consider
setting the pool up again with RAID-Z2 or Z3 and, of course, have a backup. Because RAID in any kind isn't.

The problem is that resilver stresses drives, so failure rate during resilver increases drastically.

If the drives are all from the same batch the chance a second disk fails during resilver is very high.

With 16 drives I would go with raidz3. It's not worth it to loose everything because you get 2-3TB more space.

Drives are so cheap nowadays, 16TB+ are easily affordable. Which in turn brings another issue with resilver time...
 

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