1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
tune2fs metadata_csum test
128-byte inodes cannot handle dates beyond 2038 and are deprecated
Creating filesystem with 524288 1k blocks and 65536 inodes
Superblock backups stored on blocks:
8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409
Allocating group tables: done
Writing inode tables: done
Creating journal (16384 blocks): done
mke2fs: Operation not supported for inodes containing extents while creating huge files
Writing superblocks and filesystem accounting information: done
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Exit status is 0
tune2fs -O metadata_csum test.img
Extents are not enabled. The file extent tree can be checksummed, whereas block maps cannot. Not enabling extents reduces the coverage of metadata checksumming. Re-run with -O extent to rectify.
64-bit filesystem support is not enabled. The larger fields afforded by this feature enable full-strength checksumming. Run resize2fs -b to rectify.
Exit status is 0
Change in FS metadata:
@@ -2,7 +2,7 @@
Last mounted on: <not available>
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
-Filesystem features: has_journal ext_attr resize_inode dir_index filetype sparse_super large_file
+Filesystem features: has_journal ext_attr resize_inode dir_index filetype sparse_super large_file metadata_csum
Default mount options: user_xattr acl
Filesystem state: clean
Errors behavior: Continue
@@ -30,6 +30,7 @@
Journal inode: 8
Default directory hash: half_md4
Journal backup: inode blocks
+Checksum type: crc32c
Journal features: (none)
Total journal size: 16M
Total journal blocks: 16384
@@ -39,7 +40,7 @@
Journal start: 0
-Group 0: (Blocks 1-8192)
+Group 0: (Blocks 1-8192) [ITABLE_ZEROED]
Primary superblock at 1, Group descriptors at 2-3
Reserved GDT blocks at 4-259
Block bitmap at 260 (+259)
@@ -48,7 +49,7 @@
0 free blocks, 1013 free inodes, 2 directories
Free blocks:
Free inodes: 12-1024
-Group 1: (Blocks 8193-16384)
+Group 1: (Blocks 8193-16384) [ITABLE_ZEROED]
Backup superblock at 8193, Group descriptors at 8194-8195
Reserved GDT blocks at 8196-8451
Block bitmap at 8452 (+259)
@@ -57,6 +58,6 @@
0 free blocks, 1024 free inodes, 0 directories
Free blocks:
Free inodes: 1025-2048
-Group 2: (Blocks 16385-24576)
+Group 2: (Blocks 16385-24576) [ITABLE_ZEROED]
Block bitmap at 16385 (+0)
Inode bitmap at 16386 (+1)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Exit status is 0
|
