Why wipe? The smart tests are not destructive. Seems like you ran them already? And no errors.
But… if you want to really stress test them, here’s a good utility: GitHub - Spearfoot/disk-burnin-and-testing: Shell script for burn-in and testing of new or re-purposed drives
Since it seems you already ran the SMART tests you can just do badblocks alone. Keep in mind it’ll take like a week per drive. (Tho you can of course run multiple drives in parallel.)
Note: badblocks will destroy every last shred of data on the drives. If they’re close to failure it will probably make them fail.
P.S. If you do decide to run badblocks - consider switching your drives over to 4K and running a speed test like discussed in this thread: Why are hard drive sectors still 512 bytes by default? The tests themselves take like 30-40 min to run at most (incl. switching the sector size). And it would be really helpful if we had more data points. (Also note, since you’re using a RAID card, not sure sure how well those play together with 4K drives - you would have to check.)