2021-05-12 14:32:11
虛擬機器CentOS系統硬碟擴容
裝好CentOS後,發現空間太小,怎樣才能增加硬碟容量?那就是再建一個硬碟:
開啟虛擬經濟的設定新增硬碟
檢視現有的磁碟空間
fdisk -l
[root@localhost ~]# fdisk -l
Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 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: 0x000e4bd8
Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 2611 20458496 8e Linux LVM
Disk /dev/sdb: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 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: 0x00000000
我新增的是/dev/sdb
給新加的硬碟進行分割區
fdisk /dev/sdb
輸入m ,可以檢視幫助資訊
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
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
Command (m for help):
增加新的分割區
command (m for help):n
選擇基本資訊分割區,輸入:p
Command (m for help): n
Command action
e extended
p primary partition (1-4)
回車
First cylinder (1-15908,default 1):Enter
(這是迴車是指分的預設大小)
寫入並退出
command (m for help):w
然後格式化磁碟分割區
用ext4格式對/dev/sdb1進入格式化
mkfs.ext4 /dev/sdb1
[root@localhost ~]# mkfs.ext4 /dev/sdb
mke2fs 1.41.12 (17-May-2010)
/dev/sdb is entire device, not just one partition!
無論如何也要繼續? (y,n) y
/dev/sdb 已經掛載;will not make a 檔案系統 here!
[root@localhost ~]#
因為我的擴充套件碟符已經掛上去了,在佔用狀態。
掛載分割區
先建立一個掛載點
mkdir /work
mount -t ext4 /dev/sdb1/work
檢視掛載狀態
df -h
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root 18G 11G 6.2G 63% /
tmpfs 932M 72K 932M 1% /dev/shm
/dev/sda1 485M 40M 421M 9% /boot
/dev/sdb 5.0G 138M 4.6G 3% /work
[root@localhost ~]#
將掛載的目錄加入開機自動掛載
/dev/sdb1 /work ext4 errors=remount-ro 0 1
完成。
本文永久更新連結地址:http://www.linuxidc.com/Linux/2018-02/150892.htm
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