Le 01/09/2019 à 17:01, Miroslav Skoric a écrit :
EXT3-fs (dm-6): error: couldn't mount because of unsupported optional features (8000)
This is not the same as the previous error message you showed while using the Debian Jessie 8.11 installer in rescue mode :
EXT4-fs (dm-6): couldn't mount as ext3 due to feature incompatibilities
See the differences ?EXT3-fs vs EXT4-fs : "recent" versions of the kernel use the ext4 driver for all ext* versions. Seeing "EXT3-fs" indicates that you run a very old kernel, older that the 3.16 one included in Jessie.
"unsupported feature" vs "feature incompatibilities" : the former means that the kernel does not support the feature (too old, again) whereas the latter means that the feature is incompatible with mounting as ext3.
man ext4 states that "inline_data" feature is supported since version 3.8, so the 3.16 kernel from Jessie would support it.
what kind of outdated kernel version are you running ? Is it still the 3.2 version from Wheezy ? Looks like the dist upgrade was not complete. If so, install a 3.16 kernel, replace ext3 with ext4 or auto for the two filesystems, reboot and see if they mount fine.