aeva14h ago
which is "better", XFS or BTRFS? i only care about file system resilience on shitty SSDs, so like, which one is going to be slower at letting my photos be randomly destroyed by bit flips? #linux
Show threadJosh Simmons14h ago
@aeva it won't make any difference, neither has any special resilience mechanisms (especially not for data at rest).
Show threadaeva14h ago
@dotstdy well butts
Show threadGlyph14h ago
@aeva @dotstdy not true for btrfs? btrfs dup can be used for a raid configuration or on a single disk if you want, although obviously that won't help you if the whole device goes bad
Show threadJosh Simmons14h ago
@glyph @aeva I mean you can set up lots of wild configurations yea. I just mean without having some form of parity or raid they're not going to be any different in themselves (and you can do raid with either one). And you can potentially just store parity data with the files you want to archive if you just want a single disk option.
Show threadaeva14h ago
@dotstdy @glyph is there a way to make the parity data just on by default for several specific folders?
Show threadGlyph14h ago
@aeva @dotstdy this gets a bit outside my experience with btrfs, but maaaybe you can do this with subvolumes?
Show threadGlyph
@aeva @dotstdy okay no, nevermind, subvolumes are a red herring for this. looks like it's all or nothing at the filesystem level :(. and apparently SSDs can do some real Shenanigans in their controllers here https://btrfs.readthedocs.io/en/latest/mkfs.btrfs.html#man-mkfs-dup-profiles-on-a-single-device
mkfs.btrfs(8) — BTRFS documentation

5:59amWeb
Show threadaeva13h ago
@glyph @dotstdy fascinating!
Show threadJosh Simmons12h ago
@aeva @glyph yeah the fun thing with ssds is they are constantly doing error detection and recovery because of how close to the wire the actual storage is running. its all failing all the time