From: Yan Zheng <yanzheng@21cn.com>
To: btrfs@think-future.com
Cc: linux-btrfs@vger.kernel.org
Subject: Re: loop-mount btrfs .19 w/ 2.6.30: btrfs: open_ctree failed
Date: Wed, 22 Jul 2009 18:57:56 +0800 [thread overview]
Message-ID: <3d0408630907220357k7e323f16u1c8db807146feb4b@mail.gmail.com> (raw)
In-Reply-To: <20090722103003.GC16472@localhost>
2009/7/22 <btrfs@think-future.com>:
> Hey,
>
> Just tried to mount a btrfs 0.19 in a image file:
>
> dd if=3D/dev/zero of=3Dbtrfs-play.img bs=3D1024k count=3D256
>
> losetup -f btrfs-play.img
> losetup -a
> /dev/loop0: [fd02]:24653 (btrfs-play.img)
>
> mkfs.btrfs -L BTRFStest /dev/loop0
>
> WARNING! - Btrfs Btrfs v0.19 IS EXPERIMENTAL
> WARNING! - see http://btrfs.wiki.kernel.org before using
>
> fs created label BTRFStest on /dev/loop0
> =A0 =A0 =A0 =A0nodesize 4096 leafsize 4096 sectorsize 4096 size 256.0=
0MB
> Btrfs Btrfs v0.19
>
> btrfsctl -A /dev/loop0
> operation complete
> Btrfs Btrfs v0.19
>
> mount -t btrfs /dev/loop0 btrfs-test/
> mount: tipo fs errato, opzione non valida, superblocco su /dev/loop0 =
danneggiato,
> =A0 =A0 =A0 codepage o programma ausiliario mancante, o altro errore
> =A0 =A0 =A0 =A0In alcuni casi si possono trovare informazioni utili i=
n syslog. Provare
> =A0 =A0 =A0 ad esempio 'dmesg | tail'
>
> dmesg | tail
> [140443.202115] device label BTRFS_mypole devid 1 transid 7 /dev/loop=
0
> [140443.202369] BTRFS: couldn't mount because of unsupported optional=
features (1).
> [140443.202480] btrfs: open_ctree failed
>
> Did I miss something? Using ext3/4 the above works flawlessly..
>
> Probably it's only due to the "open_ctree" problem above. Using kerne=
l 2.6.30 and btrfs-tools 19-2 (debian).
>
There was a disk format change between btrfs-progs v0.18 and v0.19
(between kernel 2.6.30 and 2.6.31).
If your kernel is older than 2.6.31, please use btrfs-progs v0.18.
Yan, Zheng
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" =
in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2009-07-22 10:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-22 10:30 loop-mount btrfs .19 w/ 2.6.30: btrfs: open_ctree failed btrfs
2009-07-22 10:57 ` Yan Zheng [this message]
2009-07-22 15:29 ` btrfs
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=3d0408630907220357k7e323f16u1c8db807146feb4b@mail.gmail.com \
--to=yanzheng@21cn.com \
--cc=btrfs@think-future.com \
--cc=linux-btrfs@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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox