On Tue, 20 Apr 2021, Michael Hennebry wrote: > I've been trying to backup the root partition of my F33 installation. > To that end, I'm running a C7 live CD. > C7 won't mount the partition. > tune2fs likes it, but > [root at localhost mnt]# mount /dev/sda5 /mnt/a5 > mount: wrong fs type, bad option, bad superblock on /dev/sda5, > missing codepage or helper program, or other error > > In some cases useful info is found in syslog - try > dmesg | tail or so. > [root at localhost mnt]# dmesg | tail -n 15 > [ 146.548540] Bluetooth: BNEP socket layer initialized > [ 300.961319] JBD2: Unrecognised features on journal > [ 300.961325] EXT4-fs (sda5): error loading journal ====== WHY? > [ 361.930877] e1000e: enp0s25 NIC Link is Up 1000 Mbps Full Duplex, Flow I just ran fsck -n /dev/sda5 . [root at localhost mnt]# fsck -n /dev/sda5 fsck from util-linux 2.23.2 e2fsck 1.42.9 (28-Dec-2013) Journal superblock has an unknown incompatible feature flag set. Abort? no Journal superblock is corrupt. Fix? no fsck.ext4: The ext2 superblock is corrupt while checking ext3 journal for slash slash: ********** WARNING: Filesystem still has errors ********** [root at localhost mnt]# What is going on? What can I do about it? Does "unknown incompatible feature flag set" imply corrupt? How dangerous would it be to let fsck fix it? I'm starting to think I might need to back up / while it is in use. -- Michael hennebry at web.cs.ndsu.NoDak.edu "Sorry but your password must contain an uppercase letter, a number, a haiku, a gang sign, a heiroglyph, and the blood of a virgin." -- someeecards