On Tue, Dec 12, 2017 at 10:21 AM, O. Hartmann <ohartm...@walstatt.org>
> Question: is it possible to simply pull the faulty disk (implies I know
> exactly which one
> to pull!) and then prepare and add the replacement HDD and let the system
> do its job
> resilvering the pool?
zpool offline <poolname> <device name>
Do that first. That will mark the drive as offline, put the pool into a
degraded mode, and generally be less harmful to the system.
Then figure out which disk to pull and remove it (doing it from a powered
off state if needed).
Install the new drive, configure it however it's needed, then use:
zpool replace <poolname> <old device> <new device>
> Next question is: I'm about to replace the 3 TB HDD with a more recent and
> modern 4 TB
> HDD (WD RED 4TB). I'm aware of the fact that I can only use 3 TB as the
> other disks are 3
> TB, but I'd like to know whether FreeBSD's ZFS is capable of handling it?
Yes, it can handle it just fine. And it will keep the extra space as
"usable in the future", so if you replace all the drives with 4 TB ones,
the extra space will be added to the pool.
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