On Mon, 6 Feb 2023, Robert Krig wrote: > Hi. I was just wondering. > > My cache device is a MD Raid1 SSD. > My backing device is a BTRFS Raid10 on 8 Spinning disks. > > > Everything is setup as default. Which, as far as I recall means writethrough > caching. > > Can I just switch the caching mode on the fly while the filesystem is in use, > without any risks of corruption, or do I need to detach the cache, unmount the > FS, etc...? Yep! # cat /sys/block/bcache0/bcache/cache_mode writethrough [writeback] writearound none # echo writeback > /sys/block/bcache0/bcache/cache_mode More info: https://www.kernel.org/doc/Documentation/bcache.txt -Eric
