When I use the dumpe2fs command to look at the Block Group of the ext4 filesystem, I see "free inodes" and "unused inodes".
I want to know the difference between them ?
Why do they have different values in Group 0 ?
Group 0: (Blocks 0-32767) [ITABLE_ZEROED]
Checksum 0xd1a1, unused inodes 0
Primary superblock at 0, Group descriptors at 1-3
Reserved GDT blocks at 4-350
Block bitmap at 351 (+351), Inode bitmap at 367 (+367)
Inode table at 383-892 (+383)
12 free blocks, 1 free inodes, 1088 directories
Free blocks: 9564, 12379-12380, 12401-12408, 12411
Free inodes: 168
Group 1: (Blocks 32768-65535) [ITABLE_ZEROED]
Checksum 0x0432, unused inodes 0
Backup superblock at 32768, Group descriptors at 32769-32771
Reserved GDT blocks at 32772-33118
Block bitmap at 352 (+4294934880), Inode bitmap at 368 (+4294934896)
Inode table at 893-1402 (+4294935421)
30 free blocks, 0 free inodes, 420 directories
Free blocks: 37379-37384, 37386-37397, 42822-42823, 42856-42859, 42954-42955, 44946-44947, 45014-45015
Free inodes: