Comment by archi42

That's pure anecdata. We don't even know your workload or configuration.

Contrary anecdata: I just replaced my old SSDs: 2013 64GB 20nm MLC at 19% wear level and a 2018 500GB TLC at 34% wear level. Not because they failed, but because I had the OS on a 64GB RAID1 and needed more space. Only optimization was setting "noatime".

But that's still a horrible small N, so even the comined data is essentially meaningless.

btw, I replaced them with a bunch of HGST DC SS200 1.6TB from 2018, two of which have about as much capacity as your 30 disks. The 15nm MLC NAND is rated for 3 DWPD and has a 3% wear level. The dual ported SAS3 interface is overkill for me.

I went for a 5 disk RAID6, and could replace it another 8 times while still keeping some spare change for a visit at a gourmet restaurant.