Thank you for your detailed reply and sharing your experience and solution. So it seems Bcache and Btrfs are fundamentally incompatible when it comes to caching writes? It has worked fine for 2 months, and then it just imploded. I'll stay in writearound mode to be safe. I've checked and my cache device has a block size of 512 bytes. That's a strange value, as the backing device is a AF HDD (like all of them in the past decade or more), so the block size should be 4Kb. I guess this also works until it doesn't. Can I destroy and recreate the cache device on a live system (my root filesystem is on this bcache set). I guess I can't. This is probably what I've done wrong today - I did not unregister the whole cset before attempting to recreate the cache device. I am honestly a little afraid to touch it, after what happened. I hope Bcachefs will eliminate these problems and provide a stable unified solution. Take care - unfa wt., 23 lis 2021 o 18:40 Kai Krakow <kai@xxxxxxxxxxx> napisał(a): > > Oops: > > > # echo 1 >/sys/fs/bcache/CSETUUID/unregister > > # bcache make -C -w 4096 -l LABEL --force /dev/BPART > > CPART of course! > > # bcache make -C -w 4096 -l LABEL --force /dev/CPART > > Bye > Kai -- - Tobiasz 'unfa' Karoń www.youtube.com/unfa000
