[arch-general] Device or ressource busy

[arnaud gaboury]

On Fri, Apr 10, 2015 at 2:58 PM, arnaud gaboury
<arnaud.gaboury at gmail.com> wrote:
> On Fri, Apr 10, 2015 at 2:38 PM, arnaud gaboury
> <arnaud.gaboury at gmail.com> 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



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