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- .. SPDX-License-Identifier: GPL-2.0
- Special inodes
- --------------
- ext4 reserves some inode for special features, as follows:
- .. list-table::
- :widths: 6 70
- :header-rows: 1
- * - inode Number
- - Purpose
- * - 0
- - Doesn't exist; there is no inode 0.
- * - 1
- - List of defective blocks.
- * - 2
- - Root directory.
- * - 3
- - User quota.
- * - 4
- - Group quota.
- * - 5
- - Boot loader.
- * - 6
- - Undelete directory.
- * - 7
- - Reserved group descriptors inode. (“resize inode”)
- * - 8
- - Journal inode.
- * - 9
- - The “exclude” inode, for snapshots(?)
- * - 10
- - Replica inode, used for some non-upstream feature?
- * - 11
- - Traditional first non-reserved inode. Usually this is the lost+found directory. See s\_first\_ino in the superblock.
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