Hey Kent, No matter what I specify via make-bcache's -b and -w args they are always 512k and 512b respectively, e.g.: # make-bcache -B /dev/mapper/test-dev-174467 -C /dev/mapper/test-dev-24832 --cache_replacement_policy=fifo -b 2048k --writeback --discard UUID: 3705b1d8-4b44-406c-abf2-594c0cb146be Set UUID: a16dc554-c054-4a24-90fa-40f624e3a652 nbuckets: 8192 block_size: 1 bucket_size: 1024 nr_in_set: 1 nr_this_dev: 0 first_bucket: 1 UUID: 46a37bba-2582-4533-a95b-1eb29c71e53f Set UUID: a16dc554-c054-4a24-90fa-40f624e3a652 nbuckets: 512 block_size: 1 bucket_size: 1024 nr_in_set: 1 nr_this_dev: 0 first_bucket: 1 # cat /sys/block/bcache3/bcache/cache/bucket_size 512k I can take a look at the make-bcache source in a bit but figured I'd let you know sooner rather than later. Mike -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html