On Wed 25-09-13 15:24:34, InvTraySts wrote: > And am cloning the drive without the sync parameter this time. > root@server:~# dd if=/dev/sda of=/dev/sdf bs=4096 conv=notrunc,noerror > After it finished, I attempted to run dumpe2fs and it still responds with: > root@server:~# dumpe2fs /dev/sdf1 > dumpe2fs 1.42.5 (29-Jul-2012) > dumpe2fs: Bad magic number in super-block while trying to open /dev/sdf1 > Couldn't find valid filesystem superblock. Well, that's likely because the partition table on /dev/sdf didn't get reread. You can run 'partprobe /dev/sdf' to tell the kernel about the new partition table. Honza > So I went ahead and tried to run the tune2fs command: > root@server:~# tune2fs -f -O ^has_journal /dev/sda1 > tune2fs 1.42.5 (29-Jul-2012) > tune2fs: Bad magic number in super-block while trying to open /dev/sda1 > Couldn't find valid filesystem superblock. > > Which also fails, yet dumpe2fs on /dev/sda1 works fine. > > > On Wed, Sep 25, 2013 at 12:12 PM, Jan Kara <jack@xxxxxxx> wrote: > > On Tue 24-09-13 22:25:49, InvTraySts wrote: > >> So long story short, I had a server running that had a processor fail > >> while powered on, causing the file systems to become corrupt. I > >> replaced the motherboard, processor and power supply just to be on the > >> safe side. However, I am at a bit of a loss as to what to do now. I > >> was working sandeen in the OFTC IRC channel, but, on his > >> recommendation he suggested me to post something to the mailing list. > >> > >> Lets start off with one drive at a time (I have 4 that are corrupt). > >> The specific logical drive in question was in RAID1 on a Dell PERC 5/i > >> card. > >> If I try to mount this using: > >> mount -t ext4 /dev/sda1 /media/tmp > >> > >> It complains in dmesg with the following output: > >> 685621.845207] EXT4-fs error (device sda1): ext4_iget:3888: inode #8: > >> comm mount: bad extra_isize (18013 != 256) > >> [685621.845213] EXT4-fs (sda1): no journal found > >> > >> > >> However, if I run dumpe2fs -f /dev/sda1 I get the following output: > >> root@server:~# dumpe2fs -f /dev/sda1 > >> dumpe2fs 1.42.5 (29-Jul-2012) > >> Filesystem volume name: root > >> Last mounted on: /media/ubuntu/root > >> Filesystem UUID: f959e195-[removed] > >> Filesystem magic number: 0xEF53 > >> Filesystem revision #: 1 (dynamic) > >> Filesystem features: has_journal ext_attr resize_inode dir_index > >> filetype extent flex_bg sparse_super large_file huge_file uninit_bg > >> dir_nlink extra_isize > >> Filesystem flags: signed_directory_hash > >> Default mount options: user_xattr acl > >> Filesystem state: not clean with errors > >> Errors behavior: Continue > >> Filesystem OS type: Linux > >> Inode count: 4849664 > >> Block count: 19398144 > >> Reserved block count: 969907 > >> Free blocks: 17034219 > >> Free inodes: 4592929 > >> First block: 0 > >> Block size: 4096 > >> Fragment size: 4096 > >> Reserved GDT blocks: 1019 > >> Blocks per group: 32768 > >> Fragments per group: 32768 > >> Inodes per group: 8192 > >> Inode blocks per group: 512 > >> Flex block group size: 16 > >> Filesystem created: Sat May 25 14:59:50 2013 > >> Last mount time: Sat Aug 24 11:04:25 2013 > >> Last write time: Tue Sep 24 13:55:36 2013 > >> Mount count: 0 > >> Maximum mount count: -1 > >> Last checked: Sat Aug 24 16:56:09 2013 > >> Check interval: 0 (<none>) > >> Lifetime writes: 107 GB > >> Reserved blocks uid: 0 (user root) > >> Reserved blocks gid: 0 (group root) > >> First inode: 11 > >> Inode size: 256 > >> Required extra isize: 28 > >> Desired extra isize: 28 > >> Journal inode: 8 > >> Default directory hash: half_md4 > >> Directory Hash Seed: 01a8f605-b2bc-41ee-b7b5-11d843ab622f > >> Journal backup: inode blocks > >> FS Error count: 8 > >> First error time: Sat Aug 24 13:44:55 2013 > >> First error function: ext4_iget > >> First error line #: 3889 > >> First error inode #: 8 > >> First error block #: 0 > >> Last error time: Tue Sep 24 13:55:36 2013 > >> Last error function: ext4_iget > >> Last error line #: 3888 > >> Last error inode #: 8 > >> Last error block #: 0 > >> dumpe2fs: Corrupt extent header while reading journal super block > > OK, so really journal inode (inode #8) looks toast but superblock looks > > OK. > > > >> So I attempted to clone the drive to a 2TB backup drive that is empty, > >> and currently I am having more problems with the cloned drive than I > >> am with the original. > >> > >> sandeen said something about using tune2fs to tell it to remove the > >> has_journal flag, but I might need some assistance with that. > > Yes, you can do that with: > > tune2fs -f -O ^has_journal /dev/sda1 > > > > Let's see what mount will say after that. > > > > Another option is to run > > debugfs /dev/sda1 > > > > Then you can use ls, cd, and other debugfs commands to move within the > > filesystem and investigate things. If that will work, you have a reasonable > > chance of getting at least some data back. > > > > Honza > > -- > > Jan Kara <jack@xxxxxxx> > > SUSE Labs, CR > > > On Wed, Sep 25, 2013 at 12:12 PM, Jan Kara <jack@xxxxxxx> wrote: > > On Tue 24-09-13 22:25:49, InvTraySts wrote: > >> So long story short, I had a server running that had a processor fail > >> while powered on, causing the file systems to become corrupt. I > >> replaced the motherboard, processor and power supply just to be on the > >> safe side. However, I am at a bit of a loss as to what to do now. I > >> was working sandeen in the OFTC IRC channel, but, on his > >> recommendation he suggested me to post something to the mailing list. > >> > >> Lets start off with one drive at a time (I have 4 that are corrupt). > >> The specific logical drive in question was in RAID1 on a Dell PERC 5/i > >> card. > >> If I try to mount this using: > >> mount -t ext4 /dev/sda1 /media/tmp > >> > >> It complains in dmesg with the following output: > >> 685621.845207] EXT4-fs error (device sda1): ext4_iget:3888: inode #8: > >> comm mount: bad extra_isize (18013 != 256) > >> [685621.845213] EXT4-fs (sda1): no journal found > >> > >> > >> However, if I run dumpe2fs -f /dev/sda1 I get the following output: > >> root@server:~# dumpe2fs -f /dev/sda1 > >> dumpe2fs 1.42.5 (29-Jul-2012) > >> Filesystem volume name: root > >> Last mounted on: /media/ubuntu/root > >> Filesystem UUID: f959e195-[removed] > >> Filesystem magic number: 0xEF53 > >> Filesystem revision #: 1 (dynamic) > >> Filesystem features: has_journal ext_attr resize_inode dir_index > >> filetype extent flex_bg sparse_super large_file huge_file uninit_bg > >> dir_nlink extra_isize > >> Filesystem flags: signed_directory_hash > >> Default mount options: user_xattr acl > >> Filesystem state: not clean with errors > >> Errors behavior: Continue > >> Filesystem OS type: Linux > >> Inode count: 4849664 > >> Block count: 19398144 > >> Reserved block count: 969907 > >> Free blocks: 17034219 > >> Free inodes: 4592929 > >> First block: 0 > >> Block size: 4096 > >> Fragment size: 4096 > >> Reserved GDT blocks: 1019 > >> Blocks per group: 32768 > >> Fragments per group: 32768 > >> Inodes per group: 8192 > >> Inode blocks per group: 512 > >> Flex block group size: 16 > >> Filesystem created: Sat May 25 14:59:50 2013 > >> Last mount time: Sat Aug 24 11:04:25 2013 > >> Last write time: Tue Sep 24 13:55:36 2013 > >> Mount count: 0 > >> Maximum mount count: -1 > >> Last checked: Sat Aug 24 16:56:09 2013 > >> Check interval: 0 (<none>) > >> Lifetime writes: 107 GB > >> Reserved blocks uid: 0 (user root) > >> Reserved blocks gid: 0 (group root) > >> First inode: 11 > >> Inode size: 256 > >> Required extra isize: 28 > >> Desired extra isize: 28 > >> Journal inode: 8 > >> Default directory hash: half_md4 > >> Directory Hash Seed: 01a8f605-b2bc-41ee-b7b5-11d843ab622f > >> Journal backup: inode blocks > >> FS Error count: 8 > >> First error time: Sat Aug 24 13:44:55 2013 > >> First error function: ext4_iget > >> First error line #: 3889 > >> First error inode #: 8 > >> First error block #: 0 > >> Last error time: Tue Sep 24 13:55:36 2013 > >> Last error function: ext4_iget > >> Last error line #: 3888 > >> Last error inode #: 8 > >> Last error block #: 0 > >> dumpe2fs: Corrupt extent header while reading journal super block > > OK, so really journal inode (inode #8) looks toast but superblock looks > > OK. > > > >> So I attempted to clone the drive to a 2TB backup drive that is empty, > >> and currently I am having more problems with the cloned drive than I > >> am with the original. > >> > >> sandeen said something about using tune2fs to tell it to remove the > >> has_journal flag, but I might need some assistance with that. > > Yes, you can do that with: > > tune2fs -f -O ^has_journal /dev/sda1 > > > > Let's see what mount will say after that. > > > > Another option is to run > > debugfs /dev/sda1 > > > > Then you can use ls, cd, and other debugfs commands to move within the > > filesystem and investigate things. If that will work, you have a reasonable > > chance of getting at least some data back. > > > > Honza > > -- > > Jan Kara <jack@xxxxxxx> > > SUSE Labs, CR -- Jan Kara <jack@xxxxxxx> SUSE Labs, CR -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
