On Sun, 28 Mar 2021 at 14:47, Richard Shaw <hobbes1069@xxxxxxxxx> wrote:
Ok, so I'm struggling a bit here :)I appreciate all the detailed response, but at the same time the answers seem often bi-polar... You can do all these great things with BTRFS! But even if you test your raid array multiple times, a bad firmware may still eat all your data :)
That is true for any filesystem. Having worked with spinning disks for several decades, I have seen all sorts of failures.
I know you can't give absolute answers sometimes, but it feels like you're often a btrfs cheerleader and critic at the same time :)
It sounds like there needs to be an easy to find list of known good and known bad drives to use (be it btrfs or other similar filesystem).
At various times there have been reports with statistics on failure rates from places like Google that use huge numbers of disks. The problem is that modern drives are generally quite reliable when used properly, and new models are introduced so frequently that by the time you have statistics, the current offerings are different.
There have also been efforts to predict eminent drive failure (e.g., using S.M.A.R.T) but without much success.
There are things that will kill drives -- like a runaway batch workflow that fills the disk over a long weekend
and continuously restarts each time write fails or erratic power supplies.
My plan is to use Seagate Terascale drives which as far as I can tell are CMR and not SMR at least.
Your plan needs to consider backups and/or replication (to cloud or another site). It is easy and cheap to lose data. Not losing data is not easy and not cheap.
--
George N. White III
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