2019/3/28 星期四
- [root@hadoop04-184 ~]# df -Th
- Filesystem Type Size Used Avail Use% Mounted on
- /dev/mapper/CentOS-root xfs 47G 8.3G 39G 18% /
- devtmpfs devtmpfs 3.9G 0 3.9G 0% /dev
- tmpfs tmpfs 3.9G 0 3.9G 0% /dev/shm
- tmpfs tmpfs 3.9G 8.9M 3.9G 1% /run
- tmpfs tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
- /dev/sda1 xfs 1014M 173M 842M 18% /boot
- tmpfs tmpfs 783M 0 783M 0% /run/user/0
我们的根目录分配了 50G 比较少, 我们挂一个 / data 盘分给 100G
// 现在虚拟机上, 挂载硬盘上去
具体操作如下
- [root@hadoop04-184 ~]# fdisk -l
- Disk /dev/sdb: 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: 0x7f7d07a7
- Device Boot Start End Blocks Id System
- Disk /dev/sda: 53.7 GB, 53687091200 bytes, 104857600 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: 0x000e6745
- Device Boot Start End Blocks Id System
- /dev/sda1 * 2048 2099199 1048576 83 Linux
- /dev/sda2 2099200 104857599 51379200 8e Linux LVM
- Disk /dev/mapper/CentOS-root: 50.5 GB, 50457477120 bytes, 98549760 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 /dev/mapper/CentOS-swap: 2147 MB, 2147483648 bytes, 4194304 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
- [root@hadoop04-184 ~]# fdisk /dev/sdb // 我们来给 / dev/sdb 分区
- 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): m
- Command action
- a toggle a bootable flag
- b edit bsd disklabel
- c toggle the dos compatibility flag
- d delete a partition *(删除一个分区)
- l list known partition types (和 ls -l 的意思一样的 列出分区的类型)
- m print this menu *(打印菜单 就是查看帮助)
- n add a new partition *(new 创建一个分区)
- o create a new empty DOS partition table
- p print the partition table *(print 打印分区表)
- q quit without saving changes *(quit 退出不保存)
- s create a new empty Sun disklabel (创建一个新的空的 sun )
- t change a partition's system id *(改变一个分区的系统 id)
- u change display/entry units
- v verify the partition table
- w write table to disk and exit *(保存并退出)
- x extra functionality (experts only)
- Command (m for help): p
- Disk /dev/sdb: 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: 0x7f7d07a7
- Device Boot Start End Blocks Id System
- Command (m for help): n
- Partition type:
e extended 扩展分区
p primary partition (1-4) 主分区
接下来选择 p
Partition number (1-4): 1 第一块分区的名字
First sector (2048-2097151, default 2048): 这里直接回车表示默认从 2048 扇区开始
- Using default value 2048
- Last sector, +sectors or +size{K,M,G} (2048-2097151, default 2097151): // 直接回车把所有的都给 1
- Command (m for help): p
- Disk /dev/sdb: 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: 0x7f7d07a7
- Device Boot Start End Blocks Id System
- /dev/sdb1 2048 209715199 104856576 83 Linux
- Command (m for help): w // 保存退出
- The partition table has been altered!
- Calling ioctl() to re-read partition table.
- Syncing disks.
- [root@hadoop04-184 ~]# partprobe /dev/sdb (这里命令是告诉 Linux 内核, 我们修改了你的分区表)
- partprobe - inform the OS of partition table changes
通知操作系统分区表的变化, 不执行这个命令就需要重新启动操作系统 , 执行了这个命令就不需要了.
分区好了, 接下来就是格式化
接下来格式化, 创建文件系统.
- [root@hadoop04-184 ~]# mkfs
- mkfs mkfs.btrfs mkfs.cramfs mkfs.ext2 mkfs.ext3 mkfs.ext4 mkfs.minix mkfs.xfs
- [root@hadoop04-184 ~]# mkfs.xfs /dev/sdb1
这里命令就是可视化, 指定文件系统的类型为 xfs
- ...
- ...
- ...
- [root@hadoop04-184 ~]# tune2fs -c -1 /dev/sdb1 (不让他检查的意思)
- [root@linux6 ~]# df -Th
- Filesystem Type Size Used Avail Use% Mounted on
- /dev/sda3 ext4 7.1G 1.6G 5.1G 25% /
- tmpfs tmpfs 491M 0 491M 0% /dev/shm
- /dev/sda1 ext4 194M 29M 155M 16% /boot
- [root@linux6 /]# cd mnt/
- [root@linux6 mnt]# ll
- total 0
- [root@linux6 mnt]# mkdir data1 (创建挂载点)
- [root@linux6 mnt]# ll
- total 4
- drwxr-xr-x. 2 root root 4096 2017-12-21 15:53 data1
- [root@linux6 mnt]# cd ~
- [root@linux6 ~]# mount /dev/sdb1 /mnt/data1/ (挂载上去)
- [root@linux6 ~]# df -Th
- Filesystem Type Size Used Avail Use% Mounted on
- /dev/sda3 ext4 7.1G 1.6G 5.1G 25% /
- tmpfs tmpfs 491M 0 491M 0% /dev/shm
- /dev/sda1 ext4 194M 29M 155M 16% /boot
- /dev/sdb1 ext4 16M 1.2M 14M 8% /mnt/data1
- [root@linux6 ~]# cd /mnt/data1/
- [root@linux6 data1]# touch majihui.txt
- [root@linux6 data1]# echo "i love datcent"> majihui.txt
- [root@linux6 data1]# cat majihui.txt
- i love datcent
上面的这个挂载情况, 重启服务器之后, 就没有了
我们接下里用
挂载可以用设备也可以用 uuid 要想让他开机自挂起磁盘的话, 就需要在 / etc/fstab 上去添加
一般情况下: 不用 uuid 的方法
- [root@hadoop04-184 ~]# VIM /etc/fstab
- #
- # /etc/fstab
- # Created by anaconda on Wed Jan 16 18:21:38 2019
- #
- # Accessible filesystems, by reference, are maintained under '/dev/disk'
- # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
- #
- /dev/mapper/CentOS-root / xfs defaults,noatime 0 0
- UUID=94663c29-d395-4cd0-8cac-1f0d6dea8969 /boot xfs defaults 0 0
- /dev/mapper/CentOS-swap swap swap defaults 0 0
- /dev/sdb1 /data xfs defaults,noatime 0 0
然后重启就好了
- [root@hadoop04-184 ~]# df -Th
- Filesystem Type Size Used Avail Use% Mounted on
- /dev/mapper/CentOS-root xfs 47G 8.3G 39G 18% /
- devtmpfs devtmpfs 3.9G 0 3.9G 0% /dev
- tmpfs tmpfs 3.9G 0 3.9G 0% /dev/shm
- tmpfs tmpfs 3.9G 8.9M 3.9G 1% /run
- tmpfs tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
- /dev/sda1 xfs 1014M 173M 842M 18% /boot
- /dev/sdb1 xfs 100G 1.3G 99G 2% /data
- tmpfs tmpfs 783M 0 783M 0% /run/user/0
- cm_processes tmpfs 3.9G 1.4M 3.9G 1% /run/cloudera-scm-agent/process
来源: http://www.bubuko.com/infodetail-3002605.html