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.