On Sat, Jun 27, 2020 at 08:06:26PM -0600, Chris Murphy wrote: > Just a PSA: btrfs raid1 does not have a concept of automatic degraded > mount in the face of a device failure. By default systemd will not > even attempt to mount it if devices are missing. And it's not advised > to use 'degraded' mount option in fstab. If you do need to mount > degraded and later the missing device is found (?) you need to scrub > to catch up the formerly missing device to the current state.
An alternative to raid1 might be lsyncd (Live Syncing Daemon). I use it to sync my single SSD to a HDD in near-real-time, because doing raid1 with devices that have different performance characteristics does not work well (the slower device slows down all writes, even when using write-behind modes of mdraid). Or maybe even btrfs send/receive between two separate btrfs filesystems on the two disks? I have no experience with that (or btrfs at all really). I'm cautiously optimistic and would like to see btrfs adopted as the default due to the huge benefit to having data integrity features (I run FreeNAS at home for that reason), but I'm honestly a bit scared off by some of the recent comments in this thread. _______________________________________________ devel mailing list -- devel@lists.fedoraproject.org To unsubscribe send an email to devel-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org
