From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Ed Tomlinson Subject: Re: [linux-lvm] mounting reiserfs snapshot fails Date: Fri, 13 Apr 2001 18:42:19 -0400 References: <363990000.987194192@tiny> In-Reply-To: <363990000.987194192@tiny> MIME-Version: 1.0 Message-Id: <01041318421900.14209@oscar> Content-Transfer-Encoding: 8bit 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: List-Id: Content-Type: text/plain; charset="us-ascii" To: linux-lvm@sistina.com, Chris Mason On Friday 13 April 2001 16:36, Chris Mason wrote: > On Friday, April 13, 2001 01:29:58 PM -0400 Ed Tomlinson > > wrote: > > Hi, > > > > Using debian sid, 2.4.3-ac5, lvm 0.91 beta7, with the vfs locking > > patch applied I get: > > > > oscar# mount /dev/lv/snap /snap -t reiserfs -oro > > mount: wrong fs type, bad option, bad superblock on /dev/lv/snap, > > or too many mounted file systems > > BTW, you can drop the -o ro, LVM sets the snapshot device readonly, so VFS > forces a readonly mount for you. > > > When trying to mount the snap shot. It was created with: > > lvcreate -L 1G -s -n snap /dev/lv/root /dev/hdg1 > > without problems > > I doubt it, but was /dev/lv/root a freshly created reiserfs disk? > > What does dumpreiserfs tell you about /dev/lv/snap and /dev/lv/root tell > you? oscar# lvcreate -L 1G -s -n snap /dev/lv/root /dev/hdg1 lvcreate -- WARNING: the snapshot will be automatically disabled once it gets full lvcreate -- INFO: using default snapshot chunk size of 64 KB for "/dev/lv/snap" lvcreate -- doing automatic backup of "lv" lvcreate -- logical volume "/dev/lv/snap" successfully created oscar# mount -t reiserfs /dev/lv/snap /snap mount: block device /dev/lv/snap is write-protected, mounting read-only mount: wrong fs type, bad option, bad superblock on /dev/lv/snap, or too many mounted file systems oscar# dumpreiserfs /dev/lv/snap dumpe2fs 1.19, 13-Jul-2000 for EXT2 FS 0.5b, 95/08/09 dumpreiserfs: Bad magic number in super-block while trying to open /dev/lv/snap Couldn't find valid filesystem superblock. oscar# dumpreiserfs /dev/lv/root dumpe2fs 1.19, 13-Jul-2000 for EXT2 FS 0.5b, 95/08/09 dumpreiserfs: Bad magic number in super-block while trying to open /dev/lv/root Couldn't find valid filesystem superblock.oscar# debugreiserfs /dev/lv/snap <-------------debugreiserfs, 2001-------------> reiserfsprogs 3.x.0j reiserfs_open: neither new nor old reiserfs format found on /dev/lv/snap print_block: buffer is NULL oscar# debugreiserfs /dev/lv/root <-------------debugreiserfs, 2001-------------> reiserfsprogs 3.x.0j Super block of format 3.6 found on the 0x3 in block 16 Block count 3670016 Blocksize 4096 Free blocks 1241068 Busy blocks (skipped 16, bitmaps - 112, journal blocks - 8193 1 super blocks, 2420626 data blocks Root block 40201 Journal block (first) 18 Journal dev 0 Journal orig size 8192 Filesystem state ERROR Tree height 5 Hash function used to sort names: "r5" Objectid map size 304, max 972 Version 2 oscar# = ? Ed