Re: ont out of 6 bcache devices does not register automatically

Coly Li
2017-11-22T12:17:01Z

On 22/11/2017 7:23 PM, Stefan Priebe - Profihost AG wrote:
> Hello,
>
> i've 6 bcache blk devices attached to 3 caching ssds (2 each). One fails
> to register automatically at boot time.
>
> After reboot i always need to execute:
> echo /dev/sdf1 >/sys/fs/bcache/register
>
> to bring up the bcache device.
>
> Any idea?

Hi Stefan,

Is there any clue from kernel message ?

Thanks.

Coly Li

> Register happens through the following udev file:
> # register bcache devices as they come up
> # man 7 udev for syntax
>
> SUBSYSTEM!="block", GOTO="bcache_end"
> ACTION=="remove", GOTO="bcache_end"
>
> # blkid was run by the standard udev rules
> # It recognised bcache (util-linux 2.24+)
> ENV{ID_FS_TYPE}=="bcache", GOTO="bcache_backing_found"
> # It recognised something else; bail
> ENV{ID_FS_TYPE}=="?*", GOTO="bcache_backing_end"
>
> # Backing devices: scan, symlink, register
> IMPORT{program}="probe-bcache -o udev $tempnode"
> ENV{ID_FS_TYPE}!="bcache", GOTO="bcache_backing_end"
> ENV{ID_FS_UUID_ENC}=="?*", SYMLINK+="disk/by-uuid/$env{ID_FS_UUID_ENC}"
>
> LABEL="bcache_backing_found"
> RUN+="bcache-register $tempnode"
> LABEL="bcache_backing_end"
>
> # Cached devices: symlink
> DRIVER=="bcache", ENV{CACHED_UUID}=="?*", \
> SYMLINK+="bcache/by-uuid/$env{CACHED_UUID}"
> DRIVER=="bcache", ENV{CACHED_LABEL}=="?*", \
> SYMLINK+="bcache/by-label/$env{CACHED_LABEL}"
>
> LABEL="bcache_end"
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--
Coly Li