Mkfs.ext4

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mkfs.ext4 /dev/vg01/lv01
mke2fs 1.44.1 (24-Mar-2018)
Creating filesystem with 2441850880 4k blocks and 305233920 inodes
Filesystem UUID: e6742357-a181-4b82-837f-9a01f3e52568
Superblock backups stored on blocks:
	32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
	4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
	102400000, 214990848, 512000000, 550731776, 644972544, 1934917632

Allocating group tables: done
Writing inode tables: done
Creating journal (262144 blocks): done
Writing superblocks and filesystem accounting information: done
mkfs.ext4 /dev/sda222
mke2fs 1.44.1 (24-Mar-2018)
Found a dos partition table in /dev/sda222
Proceed anyway? (y,N) y
mkfs.ext4: inode_size (128) * inodes_count (0) too big for a filesystem with 0 blocks, specify higher inode_ratio (-i) or lower inode count (-N).

Review your partition table (fdisk -l /dev/sda222), read https://www.beinfog.com/systems/dont-try-to-create-file-system-on-an-extended-partition/


mkfs.ext4 -S
-S  Write superblock and group descriptors only.


mkfs.ext4 -F /path/to/yourfile

Activities

  1. Create an ext4 filesystem using mkfs.ext4 command
  2. Learn about bytes per inode ratio: https://wiki.archlinux.org/index.php/ext4#Bytes-per-inode_ratio
  3. resize2fs online and ext4 filesystem
  4. Learn about Lazy initialization feature of ext4: https://www.thomas-krenn.com/en/wiki/Ext4_Filesystem#Lazy_Initialization and how to avoid it mkfs.ext4 -E lazy_itable_init=0,lazy_journal_init=0 /dev/mapper/fc-device

See also

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