From mboxrd@z Thu Jan 1 00:00:00 1970 From: Petro Message-ID: <20011111212427.B4199@auctionwatch.com> Mime-Version: 1.0 Content-Disposition: inline Subject: [linux-lvm] LVM, Reiserfs, and snapshots. Sender: linux-lvm-admin@sistina.com Errors-To: linux-lvm-admin@sistina.com Reply-To: linux-lvm@sistina.com List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: Date: Sun Nov 11 23:23:02 2001 List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-lvm@sistina.com Im having a bit of trouble here, and I'm hoping that someone on this list can assist me. I am trying to do snapshots on a database system, and I'm getting: dbgsh01:~# lvremove /dev/vg0/snap23052 lvremove -- do you really want to remove "/dev/vg0/snap23052"? [y/n]: y lvremove -- doing automatic backup of volume group "vg0" lvremove -- logical volume "/dev/vg0/snap23052" successfully removed dbgsh01:~# lvcreate -L 10G -s -n test /dev/vg0/lv0 lvcreate -- WARNING: the snapshot will be automatically disabled once it gets full lvcreate -- INFO: using default snapshot chunk size of 64 KB for "/dev/vg0/test" lvcreate -- doing automatic backup of "vg0" lvcreate -- logical volume "/dev/vg0/test" successfully created dbgsh01:~# mount -o ro /dev/vg0/test /snap/ mount: wrong fs type, bad option, bad superblock on /dev/vg0/test, or too many mounted file systems And of course, /dev/log/kern.log contains: Nov 11 21:15:23 dbgsh01 kernel: reiserfs:warning: CONFIG_REISERFS_CHECK is set ON Nov 11 21:15:23 dbgsh01 kernel: reiserfs:warning: - it is slow mode for debugging. Nov 11 21:15:23 dbgsh01 kernel: reiserfs: checking transaction log (device 3a:01) ... Nov 11 21:15:23 dbgsh01 kernel: journal-1153: found in header: first_unflushed_offset 7026, last_flushed_trans_id 11094 Nov 11 21:15:23 dbgsh01 kernel: journal-1006: found valid transaction start offs et 7026, len 3 id 11095 Nov 11 21:15:23 dbgsh01 kernel: clm-2076: device is readonly, unable to replay log Nov 11 21:15:23 dbgsh01 kernel: Replay Failure, unable to mount Nov 11 21:15:23 dbgsh01 kernel: reiserfs_read_super: unable to initialize journal space Ok, so there's the problem description. Kernel version is 2.4.14 (no patches), Debian variant of Linux, using: Logical Volume Manager 0.9.1_beta7 mount: mount-2.11h The funny thing is that I've got 2 other systems where I *can* do the above steps, and the only differences are the kernel on *one* of the systems (2.4.8-ac8) and the configuration of the underlying hardware (all three have 3ware cards, one of them has 2 disks in raid0, the other 2 have raid1. One working and one non-working have raid1.). Any clues? -- Share and Enjoy.