新增磁盘分区总体详细示例（包括 Ubuntu 进行文件系统部署时报错解决办法）

mac2024-03-29 34

新增磁盘分区总体示例

1、新增磁盘分区总体示例1.1 磁盘信息查看1.2 增加新分区 /dev/vda3 ，格式为 LVM1.3 进行新增分区查看1.4 通知内核，重读分区1.5 对新增分区进行文件系统部署1.6 对新增分区进行挂载使用1.7 编辑 /etc/fstab 文件，实现开机自动挂载 2、Ubuntu 系统进行文件系统部署的时候注意事项2.1 报错提示如下2.2 原因是内核未重读分区信息，解决办法如下2.3 正常挂载使用2.4 设置自动挂载

1、新增磁盘分区总体示例

1.1 磁盘信息查看

[root@tangtang tmp]# fdisk -l Disk /dev/vda: 107.4 GB, 107374182400 bytes, 209715200 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: dos Disk identifier: 0x000ad887 Device Boot Start End Blocks Id System /dev/vda1 * 2048 2099199 1048576 83 Linux /dev/vda2 2099200 20971519 9436160 8e Linux LVM

1.2 增加新分区 /dev/vda3 ，格式为 LVM

[root@tangtang tmp]# fdisk /dev/vda Welcome to fdisk (util-linux 2.23.2). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Command (m for help): n Partition type: p primary (2 primary, 0 extended, 2 free) e extended Select (default p): Using default response p Partition number (3,4, default 3): First sector (20971520-209715199, default 20971520): Using default value 20971520 Last sector, +sectors or +size{K,M,G} (20971520-209715199, default 209715199): +10G Partition 3 of type Linux and of size 10 GiB is set Command (m for help): t Partition number (1-3, default 3): 3 Hex code (type L to list all codes): L 8 AIX 4e QNX4.x 2nd part 8e Linux LVM df BootIt Hex code (type L to list all codes): 8e Changed type of partition 'Linux' to 'Linux LVM' Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. WARNING: Re-reading the partition table failed with error 16: Device or resource busy. The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8) Syncing disks.

1.3 进行新增分区查看

1.4 通知内核，重读分区

[root@tangtang tmp]# partx -a /dev/vda partx: /dev/vda: error adding partitions 1-2 [root@tangtang tmp]# partx -a /dev/vda partx: /dev/vda: error adding partitions 1-3

1.5 对新增分区进行文件系统部署

[root@tangtang tmp]# mkfs.ext4 /dev/vda3 mke2fs 1.42.9 (28-Dec-2013) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 655360 inodes, 2621440 blocks 131072 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=2151677952 80 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done

1.6 对新增分区进行挂载使用

[root@tangtang tmp]# mount /dev/vda3 /tangtang/ [root@tangtang tmp]# cd /tangtang/ [root@tangtang tangtang]# ll total 16 drwx------ 2 root root 16384 Oct 31 10:51 lost+found # 显示此目录，说明挂载成功

1.7 编辑 /etc/fstab 文件，实现开机自动挂载

[root@tangtang tangtang]echo "/dev/vda3 /tangtang ext4 defaults 0 0" >> /etc/fstab

2、Ubuntu 系统进行文件系统部署的时候注意事项

2.1 报错提示如下

root@ubuntu:~# mkfs.ext4 /dev/vda3 mke2fs 1.42.13 (17-May-2015) The file /dev/vda3 does not exist and no size was specified.

2.2 原因是内核未重读分区信息，解决办法如下

root@ubuntu:~# partprobe root@ubuntu:~# mkfs.ext4 /dev/vda3 mke2fs 1.42.13 (17-May-2015) Creating filesystem with 5242880 4k blocks and 1310720 inodes Filesystem UUID: f6e580f1-7ef3-4508-84c8-4a44157c2819 Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done

2.3 正常挂载使用

root@ubuntu:~# mkdir /tangtang root@ubuntu:~# mount /dev/vda3 /tangtang root@ubuntu:~# ls /tangtang lost+found

2.4 设置自动挂载

root@ubuntu:~# echo "/dev/vda3 /tangtang ext4 defaults 0 0" >> /etc/fstab root@ubuntu:~# tail -1 /etc/fstab /dev/vda3 /tangtang ext4 defaults 0 0

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