主机: CentOS release 6.4 (Final)

目的:从/home分区分出100G来创建新分区/vm

参考

http://ryanclouser.com/?p=66

http://falstaff.agner.ch/2013/12/22/online-resize-root-filesystem-on-a-gpt-partition/

http://blog.zepsikopat.net/2011/07/22/resize-an-ext4-partition-on-a-gpt-disk/

http://superuser.com/questions/660309/live-resize-of-a-gpt-partition-on-linux

1. 查看当前分区情况

[root@tanghuimin
/]# df -Th

Filesystem Type Size Used Avail Use% Mounted on

/dev/sda3 ext4 9.7G 6.6G 2.6G 72% /

tmpfs tmpfs 1.8G 280K 1.8G 1% /dev/shm

/dev/sda1 ext4 426G 37G 368G 10% /home

/dev/sda2 ext4 20G 4.2G 15G 23% /opt

/home分区在/dev/sda1.

2. gdisk /dev/sda

?: 打印gdisk下命令的用法

p: 查看分区表

b:
备份分区表,以便后面操作失误可以恢复分区表

[root@tanghuimin
~]# gdisk /dev/sda

GPT fdisk (gdisk) version 0.8.10

Partition table scan:

MBR: protective

BSD: not present

APM: not present

GPT: present

Found valid GPT with protective MBR; using GPT.

Command (?
for help): ?

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): p

Disk /dev/sda: 976773168 sectors, 465.8 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): FB42D8BC-9B54-4B3B-A16C-A39A39B902FF

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 976773134

Partitions will be aligned on 2048-sector boundaries

Total free space is 2029 sectors (1014.5 KiB)

Number Start (sector) End (sector) Size Code Name

1 2048 907141119 432.6 GiB 0700

2 907141120 948101119 19.5 GiB 0700

3 948101120 968581119 9.8 GiB EF00

4 968581120 976773119 3.9 GiB 8200

Command (?
for help): b

Enter backup filename to save: /root/gpt.sda.bak

The operation has completed successfully.

3. 卸载即将被调整的分区/home

[root@tanghuimin
~]# umount /home/

[root@tanghuimin ~]# df -Th

Filesystem Type Size Used Avail Use% Mounted on

/dev/sda3 ext4 9.7G 6.6G 2.6G 72% /

tmpfs tmpfs 1.8G 296K 1.8G 1% /dev/shm

/dev/sda2 ext4 20G 4.2G 15G 23% /opt

4. 检测文件系统错误

[root@tanghuimin
~]# e2fsck -f /dev/sda1

e2fsck 1.41.12 (17-May-2010)

Pass 1: Checking inodes, blocks, and sizes

Pass 2: Checking directory structure

Pass 3: Checking directory connectivity

Pass 4: Checking reference counts

Pass 5: Checking group summary information

/dev/sda1: 268432/28352512 files (0.1% non-contiguous),
11359488/113392384 blocks

5. resize2fs调整文件系统大小

[root@tanghuimin
~]# resize2fs /dev/sda1 326G

resize2fs 1.41.12 (17-May-2010)

Resizing the filesystem on /dev/sda1 to 85458944 (4k) blocks.

The filesystem on /dev/sda1 is now 85458944 blocks long.

6. gdisk调整分区大小,先用d删除分区,后用n创建分区

[root@tanghuimin ~]# gdisk /dev/sda

GPT fdisk (gdisk) version 0.8.10

Partition table scan:

MBR: protective

BSD: not present

APM: not present

GPT: present

Found valid GPT with protective MBR; using GPT.

Command (? for help): p

Disk /dev/sda: 976773168 sectors, 465.8 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): FB42D8BC-9B54-4B3B-A16C-A39A39B902FF

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 976773134

Partitions will be aligned on 2048-sector boundaries

Total free space is 2029 sectors (1014.5 KiB)

Number Start (sector) End (sector) Size Code Name

1 2048 907141119 432.6 GiB 0700

2 907141120 948101119 19.5 GiB 0700

3 948101120 968581119 9.8 GiB EF00

4 968581120 976773119 3.9 GiB 8200

Command (?
for help): d

Partition number (1-4): 1

Command (? for help): p

Disk /dev/sda: 976773168 sectors, 465.8 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): FB42D8BC-9B54-4B3B-A16C-A39A39B902FF

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 976773134

Partitions will be aligned on 2048-sector boundaries

Total free space is 907141101 sectors (432.6 GiB)

Number Start (sector) End (sector) Size Code Name

2 907141120 948101119 19.5 GiB 0700

3 948101120 968581119 9.8 GiB EF00

4 968581120 976773119 3.9 GiB 8200

Command (?
for help): n

Partition number (1-128, default 1):

First sector (34-976773134, default = 2048) or {+-}size{KMGTP}:

Last sector (2048-907141119, default = 907141119) or
{+-}size{KMGTP}: 326G

Current type is 'Linux filesystem'

Hex code or GUID (L to show codes, Enter = 8300):

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/sda.

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.

分区大小调整完毕。

7. /dev/sda1挂载到/home

[root@tanghuimin ~]# df -Th

Filesystem Type Size Used Avail Use% Mounted on

/dev/sda3 ext4 9.7G 6.6G 2.6G 72% /

tmpfs tmpfs 1.8G 296K 1.8G 1% /dev/shm

/dev/sda2 ext4 20G 4.2G 15G 23% /opt

[root@tanghuimin
~]# mount /dev/sda1 /home/

[root@tanghuimin ~]# df -Th

Filesystem Type Size Used Avail Use% Mounted on

/dev/sda3 ext4 9.7G 6.6G 2.6G 72% /

tmpfs tmpfs 1.8G 296K 1.8G 1% /dev/shm

/dev/sda2 ext4 20G 4.2G 15G 23% /opt

/dev/sda1 ext4 321G 37G 269G 12% /home

reboot.

8. /dev/sda所有free的空间上创建新分区

[root@tanghuimin ~]# gdisk /dev/sda

GPT fdisk (gdisk) version 0.8.10

Partition table scan:

MBR: protective

BSD: not present

APM: not present

GPT: present

Found valid GPT with protective MBR; using GPT.

Command (? for help): p

Disk /dev/sda: 976773168 sectors, 465.8 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): FB42D8BC-9B54-4B3B-A16C-A39A39B902FF

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 976773134

Partitions will be aligned on 2048-sector boundaries

Total free space is 221374444 sectors (105.6 GiB)

Number Start (sector) End (sector) Size Code Name

1 2048 685768704 327.0 GiB 8300 Linux
filesystem

2 907141120 948101119 19.5 GiB 0700

3 948101120 968581119 9.8 GiB EF00

4 968581120 976773119 3.9 GiB 8200

Command (?
for help): n

Partition number (5-128, default 5):

First sector (34-976773134, default = 685770752) or
{+-}size{KMGTP}:

Last sector (685770752-907141119, default = 907141119) or
{+-}size{KMGTP}:

Current type is 'Linux filesystem'

Hex code or GUID (L to show codes, Enter = 8300):

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/sda.

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.

9. 将新分区的文件系统类型设为ext4

[root@tanghuimin
~]# mkfs -t ext4 /dev/sda5

mke2fs 1.41.12 (17-May-2010)

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

Stride=1 blocks, Stripe width=0 blocks

6922240 inodes, 27671296 blocks

1383564 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=4294967296

845 block groups

32768 blocks per group, 32768 fragments per group

8192 inodes per group

Superblock backups stored on blocks:

32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632,
2654208,

4096000, 7962624, 11239424, 20480000, 23887872

Writing inode tables: done

Creating journal (32768 blocks): done

Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 33 mounts
or

180 days, whichever comes first. Use tune2fs -c or -i to
override.

10. 将新分区/dev/sda5挂载到/vm

[root@tanghuimin
~]# mount /dev/sda5 /vm

[root@tanghuimin ~]# df -Th

Filesystem Type Size Used Avail Use% Mounted on

/dev/sda3 ext4 9.7G 6.6G 2.6G 72% /

tmpfs tmpfs 1.8G 224K 1.8G 1% /dev/shm

/dev/sda1 ext4 321G 37G 269G 12% /home

/dev/sda2 ext4 20G 4.2G 15G 23% /opt

/dev/sda5 ext4 104G 188M 99G 1% /vm

11.
/etc/fstab中添加如下行,使在系统启动时/dev/sda5被挂载到/vm

/dev/sda5 /vm ext4 defaults 1
2

reboot.

用gdisk调整gpt/ext4分区大小的更多相关文章

  1. Linux调整lvm逻辑分区大小

    转载自:https://www.cnblogs.com/kevingrace/p/5825963.html  个人记录一下   Linux下对lvm逻辑卷分区大小的调整(针对xfs和ext4不同文件系 ...

  2. 调整分区大小(ext2\ext3\ext4)

    现在的时间是2017年5月27日 我想说调整分区大小没那么麻烦,至少我直接将一个ext3格式分区从50G减少到了30G. 步骤如下 1 首先确保那个分区是没被挂载的. 2 调整分区大小,但是其实并没有 ...

  3. 在不损坏数据的情况下调整分区大小(ext2\ext3\ext4)

    现在的时间是2017年5月27日 我想说调整分区大小没那么麻烦,至少我直接将一个ext3格式分区从50G减少到了30G. 步骤如下 1 首先确保那个分区是未挂载的. 2 调整分区大小,但是其实并没有实 ...

  4. UEFI+GPT模式下的Windows系统中分区结构和默认分区大小及硬盘整数分区研究

    内容摘要:本文主要讨论和分析在UEFI+GPT模式下的Windows系统(主要是最新的Win10X64)中默认的分区结构和默认的分区大小,硬盘整数分区.4K对齐.起始扇区.恢复分区.ESP分区.MSR ...

  5. 83 parrted-分区和分区大小的调整

    parted命令是由GNU组织开发的一款功能强大的磁盘分区和分区大小调整工具,与fdisk不同,它支持调整分区的大小.作为一种设计用于Linux的工具,它没有构建成处理与fdisk关联的多种分区类型, ...

  6. Cenots7对lvm逻辑卷分区大小的调整

    Cenots7对lvm逻辑卷分区大小的调整 (针对xfs和ext4不同文件系统) 1.支持的文件系统类型 特别注意的是: resize2fs命令            针对的是ext2.ext3.ex ...

  7. linux虚拟机磁盘扩展与分区大小调整

    有段时间觉得linux虚拟机上的磁盘不太够用,研究了下其磁盘扩展 1.linux虚拟机磁盘扩展 step1. 先关机在编辑虚拟机中,找到硬盘选项增加空间,进行扩展step2. 进入root fdisk ...

  8. Linux磁盘分区(四)之分区大小调整

    Linux磁盘分区(四)之分区大小调整在学习调整分区大小之前,先了解linx分区的概念.参考如下博客:[1]linux 分区 物理卷 逻辑卷 https://www.cnblogs.com/liuch ...

  9. 调整Linux磁盘分区的大小的方法

      昨天数据入库时,一直报错,说磁盘满了,,df -h    一看,发现/目录下只有50G空间,已使用49G:我的程序和dbss都安装在/目录下,ftp到的数据放在/data下的一个子目录下,分解完的 ...

随机推荐

  1. sql server 数据库系统整理——数据表的创建和管理

    注意: 1.  固定长度字符类型比非固定长度字符类型占用空间要大,可是因为进行字段值设置的时候固定长度字符类型无需进行长度处理就能够进行,因此它的处理速度更快. 所以          对于长度相对固 ...

  2. css:清除浮动 overflow

    是因为overflow除了(visible)会重新给他里面的元素建立块级格式化(block formatting context)floats, position absolute, inline-b ...

  3. sql字符串处理

    sql字符串截取 substring(ParamName,start,length) start开始位置,length结束位置 DECLARE @Tel NVARCHAR(20) SET @Tel=' ...

  4. SQL检索语句及过滤语句

    首先推荐一款比较好用的数据库管理软件:navicat premium. 数据库中最重要的检索功能:SELECT语句 1.检索单个列:select 列名 from 表名: 2.检索多个列:select ...

  5. jQuery 获取DOM元素

    (function (window){ var arr=[]; var VP=function(selector,context){ return new VP.fn.init(selector,co ...

  6. hdu 2814 Interesting Fibonacci

    pid=2814">点击此处就可以传送 hdu 2814 题目大意:就是给你两个函数,一个是F(n) = F(n-1) + F(n-2), F(0) = 0, F(1) = 1; 还有 ...

  7. ThreadLocal,LinkedBlockingQueue,线程池 获取数据库连接2改进

    package com.ctl.util; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQL ...

  8. 开发ActiveX控件调用另一个ActiveX系列1——开发一个MFC ActiveX控件

    ActiveX开发的教程有很多,我也从中受益匪浅,例如以下这几篇: 基本教程:http://www.cnblogs.com/guenli/articles/1629915.html 注意事项:http ...

  9. 12306 外包给阿里巴巴、IBM 等大企业做是否可行?

    知乎上看到的,转载过来,雅俗共赏 12306首秀被骂的狗血喷头后铁道部找来IBM.阿里巴巴等大企业要解决方式,给出的条件是资金管够可是问题得解决. 几大企业最后都拒绝了(当中阿里巴巴最后负责了排队系统 ...

  10. 为什么阿里巴巴不建议在for循环中使用"+"进行字符串拼接

    字符串,是Java中最常用的一个数据类型了.关于字符串的知识,作者已经发表过几篇文章介绍过很多,如: Java 7 源码学习系列(一)--String 该如何创建字符串,使用" " ...