this post was submitted on 27 Mar 2024
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They’ll have to get a new SAS controller unless the RAID controller has an HBA mode. Running ZFS under a RAID controller is the best way to lose all of your data.
ZFS is wonderful but it takes quite a bit of planning and specialized knowledge to implement properly. Your fear of a failed RAID controller is a bit much, too. I’ve had to deal with a single controller failure in 30 years of IT (and I’ve done warranty work for all of the major OEMs in corporate IT for most of those 30 years)
Is HBA mode that rare? It seems pretty common. Either way, we don't know OP's hardware.
And I'm not scared of RAID controller failure, I'm scared of single point failure. I know it's highly unlikely, but the risk for stranded data is unacceptable IMHO unless you're recommending OP make sure they have a spare on hand.
Also, I never even mentioned ZFS (I've actually never even used it).