ceph@cephdeploy01:~/ceph-deploy$ ceph-deploy osd prepare --fs-type btrfs cephosd01:sdc:sde
[ceph_deploy.cli][INFO  ] Invoked (1.4.0): /usr/bin/ceph-deploy osd prepare --fs-type btrfs cephosd01:sdc:sde
[ceph_deploy.osd][DEBUG ] Preparing cluster ceph disks cephosd01:/dev/sdc:/dev/sde
[cephosd01][DEBUG ] connected to host: cephosd01 
[cephosd01][DEBUG ] detect platform information from remote host
[cephosd01][DEBUG ] detect machine type
[ceph_deploy.osd][INFO  ] Distro info: Ubuntu 14.04 trusty
[ceph_deploy.osd][DEBUG ] Deploying osd to cephosd01
[cephosd01][DEBUG ] write cluster configuration to /etc/ceph/{cluster}.conf
[cephosd01][WARNIN] osd keyring does not exist yet, creating one
[cephosd01][DEBUG ] create a keyring file
[cephosd01][INFO  ] Running command: sudo udevadm trigger --subsystem-match=block --action=add
[ceph_deploy.osd][DEBUG ] Preparing host cephosd01 disk /dev/sdc journal /dev/sde activate False
[cephosd01][INFO  ] Running command: sudo ceph-disk-prepare --fs-type btrfs --cluster ceph -- /dev/sdc /dev/sde
[cephosd01][WARNIN] WARNING:ceph-disk:OSD will not be hot-swappable if journal is not the same device as the osd data
[cephosd01][WARNIN] Turning ON incompat feature 'extref': increased hardlink limit per file to 65536
[cephosd01][DEBUG ] Creating new GPT entries.
[cephosd01][DEBUG ] The operation has completed successfully.
[cephosd01][DEBUG ] Creating new GPT entries.
[cephosd01][DEBUG ] The operation has completed successfully.
[cephosd01][DEBUG ] 
[cephosd01][DEBUG ] WARNING! - Btrfs v3.12 IS EXPERIMENTAL
[cephosd01][DEBUG ] WARNING! - see http://btrfs.wiki.kernel.org before using
[cephosd01][DEBUG ] 
[cephosd01][DEBUG ] fs created label (null) on /dev/sdc1
[cephosd01][DEBUG ] 	nodesize 32768 leafsize 32768 sectorsize 4096 size 2.73TiB
[cephosd01][DEBUG ] Btrfs v3.12
[cephosd01][DEBUG ] The operation has completed successfully.
[ceph_deploy.osd][DEBUG ] Host cephosd01 is now ready for osd use.