Btrfs-rec: Recover (data from) a broken btrfs filesystem

https://www.lukeshu.com/blog/btrfs-rec.html

by marbu • 3 years ago

5 4 3 years ago

Surely losing less than 100MB of data from a drive should not render hundreds of GB of perfectly intact data unreadable!

Considering btrfs doesn't have a working RAID implementation, screwing up a drive would lead to the volume being unusable, yes.

gmerc• 3 years ago

Symbology devices ship with btrfs based raid by default.

voxadam• 3 years ago

Synology's RAID is based on a combination of Btrfs and MD, it doesn't employ Btrfs' multi-device support at all.[0]

[0] https://kb.synology.com/en-nz/DSM/tutorial/What_was_the_RAID...

tiberious726• 3 years ago

Raid 0 and raid 1 absolutely work well on btrfs, I've been running in production at scale for more than a decade.

(Raid 5 and 6 are a different story, but frankly I think it's silly that modern systems talk about them at all, instead of general purpose erasure-coding.)

Btrfs-rec: Recover (data from) a broken btrfs filesystem

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