分区信息显示：

dumpe2fs命令 注意：dumpe2fs是查看ext2/ext3/ext4 文件系统信息的命令

dumpe2fs /dev/sda1

dumpe2fs 1.39 (29-May-2006)

Filesystem volume name: /boot

Last mounted on: <not available>

Filesystem UUID: e8697a35-7768-45c3-8063-15b0ba67d796

Filesystem magic number: 0xEF53

Filesystem revision #: 1 (dynamic)

Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery sparse_super

Default mount options: user_xattr acl

Filesystem state: clean

Errors behavior: Continue

Filesystem OS type: Linux

Inode count: 26104

Block count: 104388

Reserved block count: 5219

Free blocks: 89714

Free inodes: 26070

First block: 1

Block size: 1024

Fragment size: 1024

Reserved GDT blocks: 256

Blocks per group: 8192

Fragments per group: 8192

Inodes per group: 2008

Inode blocks per group: 251

Filesystem created: Tue Oct 15 10:37:16 2013

Last mount time: Wed Oct 16 06:20:21 2013

Last write time: Wed Oct 16 06:20:21 2013

Mount count: 3

Maximum mount count: -1

Last checked: Tue Oct 15 10:37:16 2013

Check interval: 0 (<none>)

Reserved blocks uid: 0 (user root)

Reserved blocks gid: 0 (group root)

First inode: 11

Inode size: 128

Journal inode: 8

Default directory hash: tea

Directory Hash Seed: 4e3f02e9-f3d1-4ad1-b87c-8f6258c50435

Journal backup: inode blocks

Journal size: 4114k

blkid命令 查看磁盘分区 UUID信息

# blkid /dev/vda1

/dev/vda1: UUID="eb448abb-3012-4d8d-bcde-94434d586a31" TYPE="ext4"

mkfs命令 磁盘格式化

格式化(format)是指对磁盘或磁盘中的分区（partition）进行初始化的一种操作，这种操作通常会导致现有的磁盘或分区中所有的文件被清除。格式化通常分为低级格式化和高级格式化。如果没有特别指明，对硬盘的格式化通常是指高级格式化，而对软盘的格式化则通常同时包括这两者。