(系统:vmware上的centos7.4 ,使用工具:parted分区命令。)
最近发现磁盘不够用了,需要加点。## WARNING ! 下面是实验过程,不代表生产环境。若有重要数据请操作前备份。
但是直接加还不够,还得分区。闲话不说,开始。
首先,在vm上已经加了空间,这里先加个10G试试手。(原来是20G,由于是SSD,存储空间吃紧)
然后启动虚机,df -h 查看状态
[root@centos7 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 40G 1.8G 36G 5% /
devtmpfs 983M 0 983M 0% /dev
tmpfs 992M 0 992M 0% /dev/shm
tmpfs 992M 8.5M 984M 1% /run
tmpfs 992M 0 992M 0% /sys/fs/cgroup
/dev/sdb1 20G 44M 19G 1% /data
tmpfs 199M 0 199M 0% /run/user/0
[root@centos7 ~]#
要对磁盘进行分区,首先得卸载,因为一会儿要重建分区:
[root@centos7 ~]# umount /dev/sdb1
现在,parted出马了:(这里需要注意别把sdb打成了sdb1,别问我为什么要提醒=·)
[root@centos7 ~]# parted /dev/sdb
GNU Parted 3.1
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 34.4GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: Number Start End Size Type File system Flags
1 1049kB 21.0GB 21.0GB primary ext4(parted)
这里我们看到整个盘有34G,但是分区,也就是sdb1只分了21G,现在我们进行扩容。
(parted) unit s
(parted)
(parted) p
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 67108864s
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: Number Start End Size Type File system Flags
1 2048s 41015295s 41013248s primary ext4(parted)
这里用unit s 将显示单位设置为扇区,是为了方便后面分区。
先删除已有分区,rm 1
再设置我们需要的分区格式:ext4,起始扇区:2048,结束扇区,这里我们以大小替代:32G
(parted) rm 1
(parted)
(parted)
(parted)
(parted) mkpart primary ext4 2048 32G
(parted)
(parted) q
Information: You may need to update /etc/fstab.[root@centos7 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 40G 1.8G 36G 5% /
devtmpfs 983M 0 983M 0% /dev
tmpfs 992M 0 992M 0% /dev/shm
tmpfs 992M 8.5M 984M 1% /run
tmpfs 992M 0 992M 0% /sys/fs/cgroup
tmpfs 199M 0 199M 0% /run/user/0
/dev/sdb1 20G 44M 19G 1% /data
[root@centos7 ~]#
退出parted之后我们再df看,发现未生效,因为还有几个命令要敲:
[root@centos7 ~]# umount /dev/sdb1 先卸载
[root@centos7 ~]#
[root@centos7 ~]#
[root@centos7 ~]# e2fsck -f /dev/sdb1 检测磁盘是否有错误
e2fsck 1.42.9 (28-Dec-2013)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/sdb1: 11/1286144 files (0.0% non-contiguous), 124769/5126656 blocks
[root@centos7 ~]#
[root@centos7 ~]#
[root@centos7 ~]# resize2fs /dev/sdb1 扩展数据盘大小,如果文件格式为xfs,则使用命令:xfs_growfs /dev/sdb1
resize2fs 1.42.9 (28-Dec-2013)
Resizing the filesystem on /dev/sdb1 to 7812352 (4k) blocks.
The filesystem on /dev/sdb1 is now 7812352 blocks long.[root@centos7 ~]#
[root@centos7 ~]#
[root@centos7 ~]# mount -a 重新挂载
[root@centos7 ~]#
[root@centos7 ~]# df -Th
Filesystem Type Size Used Avail Use% Mounted on
/dev/sda1 ext4 40G 1.8G 36G 5% /
devtmpfs devtmpfs 983M 0 983M 0% /dev
tmpfs tmpfs 992M 0 992M 0% /dev/shm
tmpfs tmpfs 992M 8.5M 984M 1% /run
tmpfs tmpfs 992M 0 992M 0% /sys/fs/cgroup
tmpfs tmpfs 199M 0 199M 0% /run/user/0
/dev/sdb1 ext4 30G 44M 28G 1% /data
[root@centos7 ~]#
[root@centos7 ~]#
成功扩容至30G。