We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time (tm) ). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.
I don't think anyone has long term experience with qlc storage. It isn't old enough for that.
Manufacturers have most likely simulated accelerated aging using heat, and set their warranty accordingly.
Don't expect more than what the warranty promise.
There is no consumer long term digital storage solution. Except multiple copies and continuous migration to new media.
Well it's not exactly "long-term", but I have been running a DIY NAS 24/7 using a 4 TB Samsung QVO für 4+ years with close to 50 TB writes. The drive has held up perfectly so far with zero performance or reliability issues.
Samsung + QLC is a bad combination, don't expect them to be reliable as cold storage.
Samsung easily has the best and most reliable consumer SSDs. Their manufacturing, firmware, and history for SSDs is very good.
As it was mentioned, it not enough experience and info about those drives as a long-term storage. Also, if you want to keep your data as long as possible, you should consider having several copies of the data. So, even if the drive/array failure occurs you are still good by restoring the data from another copy.
No such thing as long term SSD storage.
All SSDs leak elections. Putting more bits in a cell can potentially make it easier to lose data, but that’s why we use RAID to check, and backups if things go wrong. Realistically, by the time your SSD starts failing, you can buy a new replacement that’s cheaper. High density is where all the manufacturing savings are. It doesn’t make a lot of sense to spend more for SLC when you can get faster, larger, cheaper SSDs and replace as needed.
There is no long term, I think the first one was introduced in 2018, and even then it was an Intel model I haven't seen being offered, never mind someone having it. They only picked up recently in availability and popularity so the experiences would be mostly early failures (or at least warranty ones), plus the waters are muddied by having QLC both in expensive top capacity SSDs and in the bottom of the barrel most corner cutting saving pennies ones.
A raid z2 setup should work well with 6 ssds. A weekly scrub will make sure no data is weak/ gets corrupted. Scrubs are only reads and should have basically no effect on the drives. The dual parity will make sure your data is safe.