tune2fs dangerous prompts test 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 Creating 445 huge file(s) with 1024 blocks each: done Writing superblocks and filesystem accounting information: done tune2fs -O metadata_csum test.img This operation requires a freshly checked filesystem. Please run e2fsck -f on the filesystem. Exit status is 1 tune2fs -O metadata_csum test.img Exit status is 0 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 Creating 445 huge file(s) with 1024 blocks each: done 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 Enabling checksums could take some time. Proceed anyway (or wait 5 seconds to proceed) ? (y,N) Exit status is 1 tune2fs -I 512 test.img Resizing inodes could take some time. Proceed anyway (or wait 5 seconds to proceed) ? (y,N) Exit status is 1 Change in FS metadata: 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 Enabling checksums could take some time. Proceed anyway (or wait 5 seconds to proceed) ? (y,N) This operation requires a freshly checked filesystem. Please run e2fsck -fD on the filesystem. Exit status is 0 test_filesys was not cleanly unmounted, check forced. Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 3A: Optimizing directories Pass 4: Checking reference counts Pass 5: Checking group summary information tune2fs -I 512 test.img Resizing inodes could take some time. Proceed anyway (or wait 5 seconds to proceed) ? (y,N) Setting inode size 512 Exit status is 0 tune2fs -U f0f0f0f0-f0f0-f0f0-f0f0-f0f0f0f0f0f0 test.img Setting the UUID on this filesystem could take some time. Proceed anyway (or wait 5 seconds to proceed) ? (y,N) Exit status is 0 Backing up journal inode block information. Change in FS metadata: @@ -1,3 +1,3 @@ -Filesystem UUID: 6fc3daa4-180d-4f2b-a6f2-f7a5efb79bcf -Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent 64bit sparse_super large_file huge_file uninit_bg dir_nlink extra_isize -Inode size: 256 +Filesystem UUID: f0f0f0f0-f0f0-f0f0-f0f0-f0f0f0f0f0f0 +Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent 64bit sparse_super large_file huge_file dir_nlink extra_isize metadata_csum +Inode size: 512 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 Testing with metadata checksum enabled 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 Creating 445 huge file(s) with 1024 blocks each: done 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 -U random test.img Setting the UUID on this filesystem could take some time. Proceed anyway (or wait 5 seconds to proceed) ? (y,N) Exit status is 1