阿里云linux磁盘扩容 西部数码linux系统升级系统盘后扩容根分区例子 - Linux - 服务器之家

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阿里云linux磁盘扩容 西部数码linux系统升级系统盘后扩容根分区例子

发布时间:2017-10-25 来源:服务器之家

以下内容实际操作过,成功升级系统盘,根目录分区

特别提醒:删除分区后一定要先建立分区再保存,删除后点了保存会导致数据丢失,该操作有风险,为避免误操作导致数据丢失,操作前请对您的重要数据进行备份!

[root@ebs ~]#yum -y install gdisk //安装分区工具
[root@ebs ~]#gdisk /dev/vda //操作根分区磁盘
Command (? for help): p //查看分区
Disk /dev/vda: 104857600 sectors, 50.0 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): B7172F0B-2C30-4535-981D-F0ED8B4A6065
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 104857566
Partitions will be aligned on 2048-sector boundaries
Total free space is 41945021 sectors (20.0 GiB)

Number Start (sector) End (sector) Size Code Name
1 2048 62914559 30.0 GiB 8300 Linux filesystem //注意这个值
Command (? for help): d //删除分区
Using 1

Command (? for help): 1
b back up GPT data to a file
c change a partition's name
d delete a partition
i show detailed information on a partition
l list known partition types
n add a new partition
o create a new empty GUID partition table (GPT)
p print the partition table
q quit without saving changes
r recovery and transformation options (experts only)
s sort partitions
t change a partition's type code
v verify disk
w write table to disk and exit
x extra functionality (experts only)
? print this menu

Command (? for help): n
Partition number (1-128, default 1): 1
First sector (34-104857566, default = 2048) or {+-}size{KMGTP}: 2048 //刚才记录的
Last sector (2048-104857566, default = 104857566) or {+-}size{KMGTP}: //直接回车
Current type is 'Linux filesystem'
Hex code or GUID (L to show codes, Enter = 8300): //直接回车
Changed type of partition to 'Linux filesystem'

Command (? for help): w

Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!

Do you want to proceed? (Y/N): y
OK; writing new GUID partition table (GPT) to /dev/vda.
Warning: The kernel is still using the old partition table.
The new table will be used at the next reboot.
The operation has completed successfully.

[root@ebs ~]#reboot //重启让分区生效
[root@ebs ~]#resize2fs -f /dev/vda1 //开始扩容根分区
resize2fs -f /dev/vda1
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/vda1 is mounted on /; on-line resizing required
old desc_blocks = 2, new_desc_blocks = 4
Performing an on-line resize of /dev/vda1 to 13106939 (4k) blocks.
The filesystem on /dev/vda1 is now 13106939 blocks long.

[root@ebs ~]#df -vh //完成,查看新的根分区大小

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