ext3-fs loop0 error no journal found. mounting ext3 or ext2 Embudo New Mexico

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ext3-fs loop0 error no journal found. mounting ext3 or ext2 Embudo, New Mexico

Trying to reiterate restoring the superblock with fsck didn't help. This is a very common-setup at many of the HPC centers around the world (except they may not be using LTO drives, but enterprise drives). Instead of the standard B+ or B* tree, ext4fs uses a variation of the B tree, called the H tree, which allows much larger subdirectories (ext3 was limited to 32KB). This option would tell ext2/ext3 whether to use the old inode allocator or the new Orlov inode allocator.

I haven't yet checked how this may impact performance.Speaking of loopdevices, they are usefull to get access to a disk image through VirtualBox: Set up the loop device like described above, If you run AIX or Solaris and complain to IBM or Sun, they can't say we have no control. In this case, umount will report that the "device is busy". yes Free blocks count wrong for group #368 (32254, counted=27774).

To list all the contents of the filesystem's superblock, we can pass the "-l" (lowercase "L") option to tune2fs: Code: # tune2fs -l /dev/hdXY Unlike the other tune2fs calls, this can But then I got an email from Gebhard Zocher, which pointed out a clever solution:# mount -t ext4 -o loop,ro,noexec,noload ext3-test.img /mnt/test/# ls /mnt/testbin dev home lib mnt proc sbinusrboot etc A copy of the license can be found here. And gives the error "file2 kernel: journal commit I/O error".I went in to single-user mode and execute fsck -p /dev/sdb1 (please refer to screenshot attached for the output).

The hardened kernel series I know supports this and is always a great idea to use in any secure server implementation. Perhaps you should go get some coffee III: Enable Full Journaling By default, ext3 partitions mount with the 'ordered' data mode. Reply Link roberto December 20, 2013, 9:48 amI just stumbled on this page and I would like to thank because I think it is really what I need :)I have a When I try to mount that one, I see these errors with dmesg: sd 0:0:1:0: Unhandled sense code sd 0:0:1:0: SCSI error: return code = 0x08100002 Result: hostbyte=invalid driverbyte=DRIVER_SENSE,SUGGEST_OK sdb: Current:

Linux ext2/3 filesystem stores superblock at different backup location so it is possible to get back data from corrupted partition.WARNING! For many more details, say man 8 mount .any clues on this? Since it changed the file system to ext2 from ext3 I am little worried. Posted May 27, 2013 at 6:11 PM | Permalink | Reply Joey Morin Had great hope that your technique could help me.

Those partition are /home and /usr/local, which contains the important data and I would like to be sure that they are not accessible before modifying their superblock. If the volume can be taken offline, the issue can be corrected with the host online. Errors from fsck will be text, and text for the report is far preferable to an image.The errors and reported change to ext2 are of concern. Successfully recovered my data, and with much less stress than I might have had due to the clear explanations.

Ext4, by contrast, permits file systems of up to 1024 pebibyte (PiB), or 1 exbibyte (EiB), and files of up to 16 TiB. The first is by adding data=journal as a mount option in /etc/fstab. I assume it OOM'd. The scenario is this: you're editing/using a file in an application, and whilst the application is still open, you delete the file.

See the acl(5) manual page and http://acl.bestbits.at/ for more information. Whether an intruder has deleted a log to conceal an attack or a user has destroyed a digital photo collection with an accidental rm -rf, you might someday face the need Thanks. references: http://stromberg.dnsalias.org/~strombrg/reblock.html http://stromberg.dnsalias.org/~strombrg/mtee.html egrep --help Performing the above reblock | mtee, my fedora core 3 system got -very- slow.

This is a good default for many because it helps prevent filesystem corruption when you have hardware issues, such as bad IDE/SATA/SCSI cabling, power supply failures, etc. barrier=1 This enables/disables barriers. Note that, depending on the filesystem type, state and kernel behavior, the system may still write to the device. thats if drive is not gone bad.

Since the journal is corrupt, we will remove it: tune2fs -O ^has_journal /dev/sdc2 Now complete an fsck of the device. To do this, open a terminal, and type: mount -o remount,ro /dev/partition ... ... ... How can I Recover a bad superblock from a corrupted ext3 partition to get back my data? resuid=n The user ID which may use the reserved blocks.

A crash+recovery can cause incorrect data to appear in files which were written shortly before the crash. To restore the deleted file, type the following into a terminal: extundelete --restore-file /path/to/deleted/filestep3: extundelete (if it works) should restore the file to a subdirectory in the current directory called RECOVERED_FILES. Take a 200 TB file system, which will require 53.7 billion allocations to represent the 200 TB using the largest allocation size of 4 KB supported by ext-3. In this case, the filesystem must be recreated from backups.

The following procedure can then be used to correct the issue (following assumes booted from CD): sh-3.00# umount /mnt/sysimage/var sh-3.00# tune2fs -O ^has_journal /dev/hda7 sh-3.00# e2fsck -y /dev/hda7 The default value is 5 seconds. Toggle navigation SANS Site Network Current SiteForensics & Incident Response Choose a different site HelpSecurity Training Security Certification Internet Storm Center Graduate Degree Programs Security Awareness Training Cyber Defense Penetration Testing If this error occurs with an additional partition besides the root partition, simply unmount the broken filesystem and proceed with these operations.

Ext3 is fully compatible with Ext2. To check filesystem # fsck.ext3 -b 32768 /dev/sda2 To mount filesystem with alternative superblock: # mount sb={alternative-superblock} /dev/device /mnt # mount sb=32768 /dev/sdb2 /mnt and Try to browse files. Journal checksums Ext4 adds a checksum to the journal data, which improves reliability and performance. Development continues on this next generation; given its heritage, it will be the next generation in Linux journaling file systems.

Share this tutorial on:TwitterFacebookGoogle+Download PDF version Found an error/typo on this page?About the author: Vivek Gite is a seasoned sysadmin and a trainer for the Linux/Unix & shell scripting. This means that you can mount an ext4fs partition as ext3fs or vice versa. There are two different ways to activate journal data mode. Although ext4 is not currently the standard, it will be the next default file system for most Linux distributions.

You have been warned! See also section "Can drive letters also be configured from scripts?". Have tried all things suggested in comments, still no luck, just get these errorsfreenas:/mnt# mke2fs /dev/ad1 mke2fs 1.41.14 (22-Dec-2010) /dev/ad1: Operation not permitted while setting up superblockordumpe2fs /dev/ad1 dumpe2fs 1.41.14 (22-Dec-2010)