Hi folks :-) on a backup usb disk I've formatted ext4 (debian stable, kernel (2.6.32 vanilla). Later sometimes when i try to mount this disk in syslog I see: EXT4-fs (dm-0): unsupported inode size: 0 the health how disk is good.. tune2fs -l /dev/disk is: tune2fs 1.41.12 (17-May-2010) tune2fs: Filesystem revision too high while trying to open /dev/mapper/pp Couldn't find valid filesystem superblock. what is the problem? Is an ext4 problem? what can I do to fix the problem? thanks :-) Pol -- 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