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Repair ext4 filesystem on USB drive

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http://askubuntu.com – Yet another filesystem question. I wanted to use a USB drive that I hadn't mounted for a month or so and was surprised by the fact Ubuntu was unable to mount it. I looked it up in the disk utility and it said it discovered a device with 17 MB instead of 2 GB. The hardware looks intact, I hope for the best for repairing the ext4 filesystem. I followed the instructions from HOWTO: Repair a broken Ext4 Superblock in Ubuntu, but I wasn't successful. # fsck.ext4 -v /dev/sdb e2fsck 1.42.5 (29-Jul-2012) ext2fs_open2: Bad magic number in super-block fsck.ext4: Superblock invalid, trying back (HowTos)

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Submitted by missing on 10/10/2012

Stories similar to Repair ext4 filesystem on USB drive

I have a 2TB Western external HDD. Its original filesystem was NTFS but I formatted it to EXT4. I had no problem in Linux; But today after I mounted it using ext2fsd in a windows box, I cant mount it in linux anymore! The drive had no partition but after that windows mount Disk Utility Shows it has a 1KB partition and 2TB unallocated space!!! My Data are not corrupted (I still can view my files us

I have a system with a logical volume comprising several disks. All was working fine, until I tried to add another drive to the LV.

My Kern.log file advise me to run e2fsck.

Aug 30 14:10:11 ubuntu kernel: [ 122.378292] EXT4-fs (sda11): warning: maximal mount count reached, running e2fsck is recommended Aug 30 14:10:11 ubuntu kernel: [ 122.387488] EXT4-fs (sda11): mounted filesystem with ordered data mode.

I am trying to convert a root ext3 filesystem to ext4. So i ran

tune2fs -O extents,uninit_bg,dir_index /dev/sda1

Then I changed the filesystem type from ext3 to ext4 in /etc/fstab and then added rootfstype to the grub config files. I've rebooted assuming that the kernel would just fsck on its own but it hasn't come up (headless remote machine).

ext4 filesystem broken 1 year 14 weeks ago

I have a synology nas with an internal hdd (a 2TB wd ears). This drive has SMART errors. I took the drive and build it in a external USB case.

The problem of using a filesystem like ext4 on a USB stick or memory card is that when it's mounted into another system the disk's UID/GID might not be present.

Can this be fixed with a mount option?

root fs error on boot 42 weeks 6 days ago

When I boot, I always get these messages:

Code: [    5.916703] EXT4-fs warning (device dm-1): ext4_clear_journal_err:4401: Filesystem error recorded from previous mount: IO failure [    5.916775] EXT4-fs warning (device dm-1): ext4_clear_journal_err:4402: Marking fs in need of filesystem check. [    5.917544] EXT4-fs (dm-1): mounted filesystem with ordered d

Hello all, perhaps this is an odd request, but I have the requirement none the less. Every time I mount a filesystem (at least an ext4 filesystem), I get a line indicating such in the syslog:

Oct 9 22:26:28 sulaco kernel: EXT4-fs (dm-1): mounted filesystem with ordered data mode. Opts:

I would like to not have these in the syslog.

I have a couple of external drives formatted to ext4,after some use I can see this message Code: EXT4-fs (sdc1): warning: maximal mount count reached, running e2fsck is recommended every time I attach one of them:do I have to run a manual fsck after unmounting it,or can I safely ignore the warning ?