Comments on: 调整 Xen 虚拟硬盘大小

By: wfm

wfm — Fri, 29 Jul 2011 12:05:20 +0000

请问下,windows磁盘如何动态增加大小

By: 领翔网络

领翔网络 — Wed, 06 Apr 2011 06:35:55 +0000

我是这样做的：

dd if=/dev/zero of=vm01.img bs=1 count=1 seek=20G conv=notrunc

e2fsck -f vm01.img -y

resize2fs -p vm01.img

By: elai

elai — Thu, 02 Dec 2010 13:19:08 +0000

1. 关闭虚拟机
$ xm shutdown myvm1.faladay.cublog.cn
2. 增加虚拟磁盘文件空间（4G）
$ dd if=/dev/zero bs=1024k count=4096 >> /home/myvm/myvm1.faladay.cublog.cn.img
3. 重新创建虚拟磁盘分区表
$ losetup -f
/dev/loop0
$ losetup /dev/loop0 /home/myvm/myvm1.faladay.cublog.cn.img
$ losetup -a
/dev/loop0: [fd01]:10977283 (/home/myvm/myvm1.faladay.cublog.cn.img)
$ fdisk /dev/loop0
下面是fdisk界面的输入和输出信息（摘要）：
Command (m for help): p
Device Boot Start End Blocks Id System
/dev/loop0p1 * 1 6 48163+ 83 Linux
/dev/loop0p2 7 764 6088635 8e Linux LVM
Command (m for help): d
Partition number (1-4): 2
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 2
First cylinder (7-1281, default 7):
Using default value 7
Last cylinder or +size or +sizeM or +sizeK (7-1281, default 1281):
Using default value 1281
Command (m for help): t
Partition number (1-4): 2
Hex code (type L to list codes): 8e
Changed system type of partition 2 to 8e (Linux LVM)
Command (m for help): p
/dev/loop0p1 * 1 6 48163+ 83 Linux
/dev/loop0p2 7 1281 10241437+ 8e Linux LVM
Command (m for help): w

4. 以root用户登录虚拟机
$ xm create myvm1.faladay.cublog.cn
$ ssh root@myvm1.faladay.cublog.cn

5. 修改LVM物理分卷大小
$ pvscan
PV /dev/xvda2 VG sys lvm2 [5.75 GB / 0 GB free]
Total: 1 [5.75 GB] / in use: 1 [5.75 GB] / in no VG: 0 [0 ]
$ pvresize +4096M /dev/xvda2
$ pvscan
PV /dev/xvda2 VG sys lvm2 [9.75 GB / 3.97 GB free]
Total: 1 [9.75 GB] / in use: 1 [9.75 GB] / in no VG: 0 [0 ]
$ lvscan
ACTIVE ‘/dev/sys/root’ [4.00 GB] inherit
ACTIVE ‘/dev/sys/home’ [1.28 GB] inherit
ACTIVE ‘/dev/sys/swap’ [512.00 MB] inherit
$ lvextend -L +1024M /dev/sys/root
$ lvextend -L +3072M /dev/sys/home
$ resize2fs -f /dev/sys/root
$ resize2fs -f /dev/sys/home

6. 退出虚拟机，执行下列命令
$ losetup -d /dev/loop0

至此，虚拟机磁盘扩容完毕，通过df -h命令可以看到虚拟机磁盘空间root已经扩大1G，home已经扩大3G。

By: elai

elai — Thu, 02 Dec 2010 11:47:27 +0000

我的系统是centos5.4的，按你的方法也不行。
e2fsck -b 8193 ossvr-1.img
e2fsck 1.39 (29-May-2006)
e2fsck: Bad magic number in super-block while trying to open ossvr-1.img

The superblock could not be read or does not describe a correct ext2
filesystem. If the device is valid and it really contains an ext2
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
e2fsck -b 8193

resize2fs -f ossvr-1.img
resize2fs 1.39 (29-May-2006)
resize2fs: Bad magic number in super-block while trying to open ossvr-1.img
Couldn’t find valid filesystem superblock.

By: vpsee

vpsee — Thu, 05 Aug 2010 23:42:44 +0000

请确定你的 test2.img 里只含有1个分区，并且文件系统是 ext2/ext3 的。

By: 请教

请教 — Thu, 11 Mar 2010 06:54:11 +0000

您好，按照您的操作步骤，在该步出错，请指点：
/sbin/e2fsck -f /xenos/test2.img
e2fsck 1.39 (29-May-2006)
Couldn’t find ext2 superblock, trying backup blocks…
/sbin/e2fsck: Bad magic number in super-block while trying to open /xenos/test2.img