CentOS 7 非 LVM 硬盘简单扩容

CentOS 7 非 LVM 硬盘简单扩容

查看分区信息

1
2
3
4
5
6
7
8
9
10
11
12
13
14
[root@localhost ~]# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda      8:0    0   20G  0 disk
└─sda1   8:1    0    8G  0 part /
sr0     11:0    1 1024M  0 rom
sr1     11:1    1 1024M  0 rom
[root@localhost ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        900M     0  900M   0% /dev
tmpfs           919M     0  919M   0% /dev/shm
tmpfs           919M   17M  903M   2% /run
tmpfs           919M     0  919M   0% /sys/fs/cgroup
/dev/sda1       8.0G  3.8G  4.3G  48% /
tmpfs           184M     0  184M   0% /run/user/0

重新分区

用 cfdisk 也行，反正就是把原来的分区删了新建一个然后保存

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
[root@localhost ~]# fdisk  /dev/sda
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

Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 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: 0x00095067

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048    16777215     8387584   83  Linux

Command (m for help): d
Selected partition 1
Partition 1 is deleted

Command (m for help): p

Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 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: 0x00095067

   Device Boot      Start         End      Blocks   Id  System

Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-41943039, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-41943039, default 41943039):
Using default value 41943039
Partition 1 of type Linux and of size 20 GiB is set

Command (m for help): p

Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 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: 0x00095067

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1            2048    41943039    20970496   83  Linux

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.

刷新分区

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
[root@localhost ~]# partprobe /dev/sda
[root@localhost ~]# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda      8:0    0   20G  0 disk
└─sda1   8:1    0   20G  0 part /
sr0     11:0    1 1024M  0 rom
sr1     11:1    1 1024M  0 rom
[root@localhost ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        900M     0  900M   0% /dev
tmpfs           919M     0  919M   0% /dev/shm
tmpfs           919M   17M  903M   2% /run
tmpfs           919M     0  919M   0% /sys/fs/cgroup
/dev/sda1       8.0G  3.8G  4.2G  48% /
tmpfs           184M     0  184M   0% /run/user/0

扩容分区

如果磁盘格式是 xfs：

1
2
3
4
5
6
7
8
9
10
11
[root@localhost ~]# xfs_growfs /dev/sda1
meta-data=/dev/sda1              isize=512    agcount=4, agsize=524224 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=2096896, 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 2096896 to 5242624

如果磁盘格式是 ext4：

1
[root@localhost ~]# resize2fs /dev/sda1

扩容完成

1
2
3
4
5
6
7
8
[root@localhost ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        900M     0  900M   0% /dev
tmpfs           919M     0  919M   0% /dev/shm
tmpfs           919M   17M  903M   2% /run
tmpfs           919M     0  919M   0% /sys/fs/cgroup
/dev/sda1        20G  3.8G   17G  19% /
tmpfs           184M     0  184M   0% /run/user/0

参考资料：

Centos 7如何进行磁盘扩容（LVM+非LVM）_centos磁盘扩容_氧化心的博客-CSDN博客