On 2015-11-19 23:11, Paul Loewenstein wrote:
Duncan already did a really good job of explaining this (and from what I can tell, I'm pretty sure his analysis of what's going on is correct), but I would like to add a couple of things.I have just had an apparently catastrophic collapse of a large RAID6 array. I was hoping that the dual-redundancy of a RAID6 array would compensate for having no backup media large enough to back it up!
First, RAID is not a backup, it's a way to minimize the need to restore from backups in the event of hardware failure (or, in the case of BTRFS, also a way to minimize the effects of data corruption).
Second, have you considered doing encrypted backups to a cloud storage service? This is what I personally do, and it works really well for me. Amazon S3 has pretty reasonable pricing, and there are multiple options on Linux to allow accessing it like a filesystem. There are many other options as well (in my case, I backup to both S3 and Dropbox, but I also have small enough backups that I don't need to worry about the 1T limit on Dropbox for non-business accounts).
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