Using 3.1.0-rc9 I created a cache device on /dev/sdk1 # ./make-bcache -C -b512k -w4k --writeback /dev/sdk1 and a backing device on /dev/md127p1. ./make-bcache -B /dev/md127p1 # ./probe-bcache /dev/sdk1 5f42bdd1-4342-4ab6-8dda-855989a09604: UUID="" TYPE="bcache" # ./probe-bcache /dev/md127p1 6bbac9a4-afbd-4d40-9562-cdd290622c5d: UUID="" TYPE="bcache" I then registered them by: # echo /dev/sdk1 >/sys/fs/bcache/register # echo /dev/md127p1 >/sys/fs/bcache/register I have /dev/bcache0 When I try to attach the cache, I get this: # echo "5f42bdd1-4342-4ab6-8dda-855989a09604" >/sys/block/md127/md127p1/bcache/attach -bash: echo: write error: No such file or directory I believe this problem is due to the UUIDs for the two devices, but this is just a guess. The UUID for /dev/sdk1 and /dev/md127p1 doesn't appear to be registering properly as they don't show up in blkid. I tried specifying the UUID to use with the -U option when creating the devices, but that didn't seem to help. I do have the udev rules file from the tools in place Does anyone know what is going on here and how to fix it? Justin Rush jarush@xxxxxxxx -- 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
