1. 查看数据盘信息
登录CentOS云服务器后，可以使用“fdisk -l”命令查看数据盘相关信息。 使用“df –h”命令，无法看到未分区和格式化的数据盘，只能看到已挂载的。
[root@VM_75_6_centos tlbb]# fdisk -l Disk /dev/vda: 8589 MB, 8589901824 bytes 255 heads, 63 sectors/track, 1044 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: 0xcd6e8236 Device Boot Start End Blocks Id System /dev/vda1 * 1 1044 8385898+ 83 Linux Disk /dev/vdb: 21.5 GB, 21474836480 bytes 16 heads, 63 sectors/track, 41610 cylinders Units = cylinders of 1008 * 512 = 516096 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/vdb doesn't contain a valid partition table Disk /dev/vdc: 2147 MB, 2147483648 bytes 16 heads, 63 sectors/track, 4161 cylinders Units = cylinders of 1008 * 512 = 516096 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/vdc doesn't contain a valid partition table
可以看到 vdb vdc 这两个盘并未进行分区。
2.数据盘分区
执行以下命令，对数据盘进行分区。 然后输入 n p 1 两次enter wq。分区已然形成
fdisk /dev/vdb
[root@VM_75_6_centos tlbb]# fdisk /dev/vdb Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel with disk identifier 0xf9140b26. Changes will remain in memory only, until you decide to write them. After that, of course, the previous content won't be recoverable. Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help): n Command action e extended p primary partition (1-4) p Partition number (1-4): 1 First cylinder (1-41610, default 1): Using default value 1 Last cylinder, +cylinders or +size{K,M,G} (1-41610, default 41610): Using default value 41610 Command (m for help): wq The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks.
再fdisk -l一下。
Disk /dev/vdb: 21.5 GB, 21474836480 bytes 16 heads, 63 sectors/track, 41610 cylinders Units = cylinders of 1008 * 512 = 516096 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xf9140b26 Device Boot Start End Blocks Id System /dev/vdb1 1 41610 20971408+ 83 Linux
然后进行格式化文件系统。
[root@VM_75_6_centos tlbb]# mkfs.ext3 /dev/vdb1 mke2fs 1.41.12 (17-May-2010) 文件系统标签= 操作系统:Linux 块大小=4096 (log=2) 分块大小=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 1310720 inodes, 5242852 blocks 262142 blocks (5.00%) reserved for the super user 第一个数据块=0 Maximum filesystem blocks=4294967296 160 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, 2654208, 4096000 正在写入inode表: 完成 Creating journal (32768 blocks): 完成 Writing superblocks and filesystem accounting information: 完成 This filesystem will be automatically checked every 34 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override.
最后，将此分区挂在到/home目录下
mount /dev/vdb1 /home
用df -h看一下分区信息。
[root@VM_75_6_centos tlbb]# df -h 文件系统 容量 已用 可用 已用%% 挂载点 /dev/vda1 7.9G 1.9G 5.7G 25% / /dev/vdb1 20G 173M 19G 1% /home
大功告成。