iON云服務(wù)器如何調整硬盤(pán)分區大小

iON是近幾年興起的美國主機新品牌，主要提供云主機VPS租用等服務(wù)。其中美國云服務(wù)器產(chǎn)品方案選用的是固態(tài)硬盤(pán)（SSD）配置，而新加坡云服務(wù)器使用的則是機械硬盤(pán)（HDD）。有時(shí)為了業(yè)務(wù)需求，我們要對硬盤(pán)大小進(jìn)行調整，下面就來(lái)看下升級iON云服務(wù)器后如何調整硬盤(pán)分區大小。

1、交換區調整大小。

[root@takatest ~]# cat /proc/swaps
Filename Type Size Used Priority
/dev/vda2 partition 1048572 0 -2

[root@takatest ~]# swapoff -a

[root@takatest ~]# cat /proc/swaps
Filename Type Size Used Priority

2、刪除swap和主分區，把硬盤(pán)空間重新分區，然后重啟。

[root@takatest ~]# fdisk -l

Disk /dev/vda: 343.6 GB, 343597383680 bytes, 671088640 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: 0x000958c2

Device Boot Start End Blocks Id System
/dev/vda1 * 2048 668989055 334493504 83 Linux
/dev/vda2 668989056 671086207 1048576 82 Linux swap / Solaris

[root@takatest ~]# fdisk /dev/vda
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): d
Partition number (1,2, default 2): 2
Partition 2 is deleted

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

Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p):
Using default response p
Partition number (1-4, default 1):
First sector (2048-671088639, default 2048):
Using default value 2048
Last sector, sectors or size{K,M,G} (2048-671088639, default 671088639):
Using default value 671088639
Partition 1 of type Linux and of size 320 GiB is set

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.

[root@takatest ~]#reboot

3、文件系統調整大小操作。主要使用到# resize2fs /dev/vda1，# df -h命令。

[root@takatest ~]# resize2fs /dev/vda1
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/vda1 is mounted on /; on-line resizing required
old_desc_blocks = 40, new_desc_blocks = 40
The filesystem on /dev/vda1 is now 83885824 blocks long.

[root@takatest ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/vda1 315G 1.4G 298G 1% /
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 8.5M 7.8G 1% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
tmpfs 1.6G 0 1.6G 0% /run/user/0

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