On 2/21/20 7:08 PM, Marc MERLIN wrote:
On Fri, Feb 21, 2020 at 06:47:26PM -0500, Josef Bacik wrote:
Yeah you can try the backup roots, btrfs check -b and see if that works out?
So, I'm not super clear on how to do this.
the backup roots are not really a way to go back in time, they're just
the same data that maybe didn't get written, so you can maybe go to the
last revision if all the roots are not up to date, correct?
No they're the previous transaction id's, so it's like going back in time, just
in 30 second jumps.
If so, is it best to get the last root since it's the one most likely to
be the oldest?
Well it looks to go and find the best one out of the group.
More generally do I do a check -b to see if that looks clean, and if so,
what's the command to replicate that root onto all the other roots?
If you do -b and check finishes fine, you can do --repair and it'll reset the
super to point at the backup root, and theoretically you should be good to go?
Thanks,
Josef
