From: Matthias Ferdinand <bcache@mfedv.net>
To: Thierry De Leeuw <deleeuw.thierry@gmail.com>
Cc: linux-bcache@vger.kernel.org
Subject: Re: /dev/bcache* missing after reboot
Date: Thu, 5 Dec 2013 16:37:49 +0100 [thread overview]
Message-ID: <20131205153749.GA1848@teapot> (raw)
In-Reply-To: <9FA7630E-7DC4-4F45-B5E1-FFFB511EFA8B@gmail.com>
[already sent 2 days ago, but did not appear on the list]
On Mon, Dec 02, 2013 at 11:36:47PM +0100, Thierry De Leeuw wrote:
> Hi,
>
> Running Linux 3.12.1. I have disk /dev/sda2 with LVM that has, amongst
> other, lvHome as a bcache device, and the cache resides on /dev/sdb1
>
> My PC hung and I had to do a forced shutdown.
>
> Now the /dev/bcache0 (and so on) do not appear anymore.
Perhaps you need to re-register / re-attach the backing device to the
caching device, something like
echo /dev/dm-xx > /sys/fs/bcache/register
echo yyyyyyy > /sys/devices/virtual/block/dm-xx/bcache/attach
If that does not help, you can try to force starting the bcache backing
device without the caching device (might give you serious fs damage with
writeback):
echo "1" > /sys/devices/virtual/block/dm-xx/bcache/running
But since you are using LVM, you might want to create a snapshot of the
backing device LV before doing this, just in case.
Regards
Matthias
prev parent reply other threads:[~2013-12-05 15:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-02 22:36 /dev/bcache* missing after reboot Thierry De Leeuw
2013-12-05 15:37 ` Matthias Ferdinand [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20131205153749.GA1848@teapot \
--to=bcache@mfedv.net \
--cc=deleeuw.thierry@gmail.com \
--cc=linux-bcache@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.