| Offset (bytes) | Size (bytes) | Description |
|---|---|---|
| 0 | 4 | bg_block_bitmap |
| 4 | 4 | bg_inode_bitmap |
| 8 | 4 | bg_inode_table |
| 12 | 2 | bg_free_blocks_count |
| 14 | 2 | bg_free_inodes_count |
| 16 | 2 | bg_used_dirs_count |
| 18 | 2 | bg_pad |
| 20 | 12 | bg_reserved |
bg_block_bitmap
Offset: 0 bytes
Size: 4 bytes
32bit block id of the first block of the "block bitmap" for the group represented.
The actual block bitmap is located within its own allocated blocks starting at the block ID specified by this value.