Verification done for Focal.
$ uname -rv 5.4.0-43-generic #47-Ubuntu SMP Sat Aug 8 06:34:35 UTC 2020
$ sudo make-bcache --bdev $DEV --block 8k ... [ 71.251993] bcache: bcache_device_init() bcache0: sb/logical block size (8192) greater than page size (4096) falling back to device logical block size (512) [ 71.255329] bcache: register_bdev() registered backing device loop0
Verification done for Focal.
$ uname -rv
5.4.0-43-generic #47-Ubuntu SMP Sat Aug 8 06:34:35 UTC 2020
$ sudo make-bcache --bdev $DEV --block 8k device_ init() bcache0: sb/logical block size (8192) greater than page size (4096) falling back to device logical block size (512)
...
[ 71.251993] bcache: bcache_
[ 71.255329] bcache: register_bdev() registered backing device loop0