On Fri, Apr 10, 2015 at 2:58 PM, arnaud gaboury <arnaud.gaboury@xxxxxxxxx> wrote: > On Fri, Apr 10, 2015 at 2:38 PM, arnaud gaboury > <arnaud.gaboury@xxxxxxxxx> wrote: >> Below is part of $ lsblk return: >> >> ----------------------------------------- >> sdb sdb 8:16 >> ├─sdb1 sdb1 8:17 btrfs poppy-root >> └─sdb2 sdb2 8:18 >> -------------------------------------------------- >> >> /dev/sdb2 has no filesystem yet, and is not mounted anywhere. >> >> Now running this command: >> ------------------------------------------------------ >> # make-bcache --block 4k --bucket 2M -B /dev/sdd4 -C /dev/sdb2 --discard >> Can't open dev /dev/sdb2: Device or resource busy >> ----------------------------------------------------------- >> >> I can't find any reason for /dev/sdb2 to be busy. > > looking more carefully in /dev, I couldn't find any mapper or loop > device be the culprite > Running # mount | column -t did not show the device anywhere ------------------------------------------------------- $ journalctl -k .............................. Apr 10 14:18:32 hortensia kernel: bcache: register_cache() registered cache device sdb2 ................................................ # echo 1 > /sys/fs/bcache/2f01de58-8645-44e6-820e-13d6580b8d5b/stop # make-bcache --block 4k --bucket 2M -B /dev/sdd4 -C /dev/sdb2 --discard UUID: c205843b-127a-46e4-81d6-cee3dc6c587e Set UUID: 02afb25f-d9a4-47f3-9a0c-b84f071dfff6 version: 0 nbuckets: 13891 block_size: 8 bucket_size: 4096 nr_in_set: 1 nr_this_dev: 0 first_bucket: 1 UUID: 91771811-4f40-4e67-b2df-7baf0df3229a Set UUID: 02afb25f-d9a4-47f3-9a0c-b84f071dfff6 version: 1 block_size: 8 data_offset: 16 $ lsblk └─sdb2 sdb2 8:18 bcache └─bcache0 bcache0 254:0 ......................................................... └─sdd4 sdd4 8:52 bcache └─bcache0 bcache0 254:0 -------------------------------------------------------------------- Thank you journalctl. Everything is under control > >> >> Thank you for hint. >> >> -- >> >> google.com/+arnaudgabourygabx > > > > -- > > google.com/+arnaudgabourygabx -- google.com/+arnaudgabourygabx
