目录扩容
[root@aioCloud ~]# lsblk #查看硬盘容量
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 40G 0 disk
├─sda1 8:1 0 500M 0 part /boot
├─sda2 8:2 0 2G 0 part [SWAP]
└─sda3 8:3 0 17.5G 0 part /
sr0 11:0 1 918M 0 rom
[root@aioCloud ~]# df -Th #查看目录容量
Filesystem Type Size Used Avail Use% Mounted on
/dev/sda3 xfs 18G 994M 17G 6% /
devtmpfs devtmpfs 476M 0 476M 0% /dev
tmpfs tmpfs 487M 0 487M 0% /dev/shm
tmpfs tmpfs 487M 7.6M 479M 2% /run
tmpfs tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/sda1 xfs 497M 120M 378M 25% /boot
tmpfs tmpfs 98M 0 98M 0% /run/user/0
[root@aioCloud ~]# fdisk /dev/sda #对sda这块硬盘操作
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): p #打印现有分区
Disk /dev/sda: 42.9 GB, 42949672960 bytes, 83886080 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: 0x0000ca56
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 5220351 2097152 82 Linux swap / Solaris
/dev/sda3 5220352 41943039 18361344 83 Linux
Command (m for help): d #删除分区
Partition number (1-3, default 3): 3 #删除第3块硬盘
Partition 3 is deleted #第3块硬盘已删除
Command (m for help): n #新建1个分区
Partition type:
p primary (2 primary, 0 extended, 2 free) #主分区
e extended #扩展分区
Select (default p): p #选择主分区
Partition number (3,4, default 3): #默认是3
First sector (5220352-83886079, default 5220352): #默认是5220352
Using default value 5220352
Last sector, +sectors or +size{K,M,G} (5220352-83886079, default 83886079): #默认到最大
Using default value 83886079
Partition 3 of type Linux and of size 37.5 GiB is set #已经设置了第3分区为37.5G
Command (m for help): p #再次打印分区
Disk /dev/sda: 42.9 GB, 42949672960 bytes, 83886080 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: 0x0000ca56
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 5220351 2097152 82 Linux swap / Solaris
/dev/sda3 5220352 83886079 39332864 83 Linux #第3个分区已经扩容
Command (m for help): w #保存所有设置
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.
[root@aioCloud ~]# partprobe /dev/sda #刷新sda，通知它硬盘分区发生了变化
[root@aioCloud ~]# lsblk #查看实际的变化情况
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 40G 0 disk
├─sda1 8:1 0 500M 0 part /boot
├─sda2 8:2 0 2G 0 part [SWAP]
└─sda3 8:3 0 37.5G 0 part /
sr0 11:0 1 918M 0 rom
[root@aioCloud ~]# df -Th #再次查看目录，未更新
Filesystem Type Size Used Avail Use% Mounted on
/dev/sda3 xfs 18G 994M 17G 6% /
devtmpfs devtmpfs 476M 0 476M 0% /dev
tmpfs tmpfs 487M 0 487M 0% /dev/shm
tmpfs tmpfs 487M 7.6M 479M 2% /run
tmpfs tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/sda1 xfs 497M 120M 378M 25% /boot
tmpfs tmpfs 98M 0 98M 0% /run/user/0
[root@aioCloud ~]# xfs_growfs /dev/sda3 #使用xfs_growfs对sda3进行同步
meta-data=/dev/sda3 isize=512 agcount=4, agsize=1147584 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=4590336, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 4590336 to 9833216
[root@aioCloud ~]# df -Th #同步结束后再次查看目录容量情况
Filesystem Type Size Used Avail Use% Mounted on
/dev/sda3 xfs 38G 994M 37G 3% /
devtmpfs devtmpfs 476M 0 476M 0% /dev
tmpfs tmpfs 487M 0 487M 0% /dev/shm
tmpfs tmpfs 487M 7.6M 479M 2% /run
tmpfs tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/sda1 xfs 497M 120M 378M 25% /boot
tmpfs tmpfs 98M 0 98M 0% /run/user/0
[root@aioCloud ~]#reboot #最后确定没问题重启测试