btrfs drive replacement
btrfs drive replacement
Referencing: https://lemmy.world/post/17588348
I want to make a NAS with a 500GB boot drive and 2x16TB HDDs. Based on my previous post, btrfs is a good option. It also looks easy to get started. My plan for the NAS would be to purchase several 16TB drives, and only use 2 of them.
My first question is about different drives. Could I purchase two different brand drives and use them with btrfs? (I assume yes)
2nd question: how does the replacement process go? Like if drive A died, so I remove it, and put a brand new replacement in. What do I have to do with btrfs to get the raid 1 back going? Any links or guides would be amazing.
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Is btrfs RAID stable yet? This article is three years old, so maybe things have improved, but it contains some pretty strong warnings about the dangers of btrfs RAID:
https://arstechnica.com/gadgets/2021/09/examining-btrfs-linuxs-perpetually-half-finished-filesystem/
To summarize, the article argues that btrfs is great for single-disk usage but its RAID implementations are idiosyncratic and unreliable.
(I use btrfs daily on several single-disk computers and it has been great, but I have never tried its RAID.)
I believe it's only RAID 5 and 6 that are unstable, https://btrfs.readthedocs.io/en/latest/btrfs-man5.html#raid56-status-and-recommended-practices
Mirror (raid1) btrfs raids are fine and are more convenient anyways.
Been using it for over a year on two 8tb SSDs in strip and 14tb as mirror. This is on Debian and its flawless and wonderful. I run btrkbk hourly for snapshots, backups to remote locations and house keeping with 6 months of hourly snaps. Life is great.