对于学习磁盘分区，通常学习的都是fdisk命令 当然，对于小于2TB的磁盘，我们基本上是使用fdisk命令进行分区 下面就简单介绍一下fdisk操作磁盘的基本命令和场景模拟 常用命令介绍 fdisk -l 查看所有磁盘信息 fdisk /dev/sdb 使用fdisk命令工具操作/dev/sdb磁盘 m 显示所有的命令信息、用法 p 显示分区信息 q 退出 w 保存分区信息，只有执行了w命令后才会把分区信息写入到磁盘 d 1 删除磁盘的第一个分区 场景模拟 有一个1G的磁盘/dev/sdb 分区为一个主分区，一个扩展分区，大小都为200M 其中在扩展分区上面建立一个100M的逻辑分区 /dev/sdb5 格式化文件系统为 mkfs.ext4 实现开机自动挂载到目录 /backup3 1 使用fdisk命令工具操作磁盘/dev/sdb fdisk /dev/sdb 2 创建一个主分区 Command (m for help): n Command action e extended p primary partition (1-4) p Partition number (1-4): 1 Using default value 1 Last cylinder, +cylinders or +size{K,M,G} (1-130, default 130): +400M Command (m for help): p Disk /dev/sdb: 1073 MB, 1073741824 bytes 255 heads, 63 sectors/track, 130 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0004a98a Device Boot Start End Blocks Id System /dev/sdb1 1 52 417658+ 83 Linux 3 创建一个扩展分区 Command (m for help): n Command action e extended p primary partition (1-4) e Partition number (1-4): 2 First cylinder (53-130, default 53): Using default value 53 Last cylinder, +cylinders or +size{K,M,G} (53-130, default 130): +400M Command (m for help): p Disk /dev/sdb: 1073 MB, 1073741824 bytes 255 heads, 63 sectors/track, 130 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0004a98a Device Boot Start End Blocks Id System /dev/sdb1 1 52 417658+ 83 Linux /dev/sdb2 53 104 417690 5 Extended 4 创建一个逻辑分区 Command (m for help): n Command action l logical (5 or over) p primary partition (1-4) l First cylinder (53-104, default 53): Using default value 53 Last cylinder, +cylinders or +size{K,M,G} (53-104, default 104): +100M Command (m for help): p Disk /dev/sdb: 1073 MB, 1073741824 bytes 255 heads, 63 sectors/track, 130 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0004a98a Device Boot Start End Blocks Id System /dev/sdb1 1 52 417658+ 83 Linux /dev/sdb2 53 104 417690 5 Extended /dev/sdb5 53 66 112423+ 83 Linux 5 保存 Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. 6 对磁盘进行分区 [root@hsj2 ~]# mkfs.ext4 /dev/sdb1 mke2fs 1.41.12 (17-May-2010) Filesystem label= OS type: Linux Block size=1024 (log=0) Fragment size=1024 (log=0) Stride=0 blocks, Stripe width=0 blocks 104448 inodes, 417656 blocks 20882 blocks (5.00%) reserved for the super user First data block=1 Maximum filesystem blocks=67633152 51 block groups 8192 blocks per group, 8192 fragments per group 2048 inodes per group Superblock backups stored on blocks: 8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409 Writing inode tables: done Creating journal (8192 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 31 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. //www.dnzg.cn [root@hsj2 ~]# mkfs.ext4 /dev/sdb5 mke2fs 1.41.12 (17-May-2010) Filesystem label= OS type: Linux Block size=1024 (log=0) Fragment size=1024 (log=0) Stride=0 blocks, Stripe width=0 blocks 28112 inodes, 112420 blocks 5621 blocks (5.00%) reserved for the super user First data block=1 Maximum filesystem blocks=67371008 14 block groups 8192 blocks per group, 8192 fragments per group 2008 inodes per group Superblock backups stored on blocks: 8193, 24577, 40961, 57345, 73729 Writing inode tables: done Creating journal (4096 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 31 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. ok，搞定
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