filesystems/ext4/super.rst

7 filesystem, such as block counts, inode counts, supported features,
140        refuse to mount the filesystem.
186      - Directory where filesystem was last mounted.
209      - Number of reserved GDT entries for future filesystem expansion.
263      - When the filesystem was created, in seconds since the epoch.
303        of filesystem metadata, which will hopefully make RAID storage faster.
309        have mounted the filesystem, in order to prevent multiple mounts. This
337      - Number of KiB written to this filesystem over its lifetime.
529 The filesystem creator is one of the following:
563 Note that ``EXT4_DYNAMIC_REV`` refers to a revision 1 or newer filesystem.
586      - Has reserved GDT blocks for filesystem expansion
633      - Filesystem needs recovery (INCOMPAT_RECOVER).
635      - Filesystem has a separate journal device (INCOMPAT_JOURNAL_DEV).
640      - Files in this filesystem use extents (INCOMPAT_EXTENTS).
642      - Enable a filesystem size of 2^64 blocks (INCOMPAT_64BIT).
655        the administrator to change the UUID of a metadata_csum filesystem
656        while the filesystem is mounted; without it, the checksum definition
666      - Encrypted inodes are present on the filesystem. (INCOMPAT_ENCRYPT).
683      - This filesystem has been used to store a file greater than 2GiB
688      - This filesystem has files whose sizes are represented in units of
700      - Indicates that large inodes exist on this filesystem
703      - This filesystem has a snapshot (RO_COMPAT_HAS_SNAPSHOT).
707      - This filesystem supports “bigalloc”, which means that file extents are
711      - This filesystem supports metadata checksumming.
715      - Filesystem supports replicas. This feature is neither in the kernel nor
718      - Read-only filesystem image; the kernel will not mount this image
722      - Filesystem tracks project quotas. (RO_COMPAT_PROJECT)
724      - Verity inodes may be present on the filesystem. (RO_COMPAT_VERITY)
727        to clean them up when mounting the filesystem
786      - Track which blocks in a filesystem are metadata and therefore should not