arnaud gaboury <[email protected]> schrieb: > Here is what I did: > # make-bcache -C /dev/sdb1 > # echo "UUID" > /sys/block/bcache0/bcache/attach > -------------------------------------- > $ lsblk -o > ....................... > sdb sdb > └─sdb1 sdb1 bcache > └─bcache0 bcache0 > -------------------------------- > # mkfs.btrfs -L poppy-root /dev/sdb1 > /dev/sdb1 appears to contain an existing filesystem (bcache). > Error: Use the -f option to force overwrite. > > > Please may you tell what is wrong and how can I make btrfs on bcached > partition?
You need to mkfs on /dev/bcache0. Bcache itself reserves the partition with its own superblock and creates a subdevice so you cannot accidently access the data without passing through the cache layer. This means you will also mount /dev/bcache0 as your btrfs in fstab (or simply use LABEL=poppy-root or /dev/disk/by-label/...). If you already overwrote something, I suggest to wipefs first on the partitions, otherwise the kernel may accidently misdetect filesystems that are no longer there. -- Replies to list only preferred. -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
