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Selfhosted
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No reason not to. Old reputations die hard, but it's been many many years since I've had an issue.
I like also that btrfs is a lot more flexible than ZFS which is pretty strict about the size and number of disks, whereas you can upgrade a btrfs array ad hoc.
I'll add to avoid RAID5/6 as that is still not considered safe, but you mentioned RAID1 which has no issues.
I've been vaguely planning on using btrfs in raid5 for my next storage upgrade. Is it really so bad?
Check status here. It looks like it may be a little better than the past, but I'm not sure I'd trust it.
An alternative approach I use is mergerfs + snapraid + snapraid-btrfs. This isn't the best idea for a system drive, but if it's something like a NAS it works well and
snapraid-btrfs
doesn't have the write hole issues that normalsnapraid
does since it operates on r/o snapshots instead of raw data.It's affected by the write-hole phenomenon. In BTRFS case that can mean that perfectly good old data might corrupt without any notice.