linux下磁盘管理之利器 lvm使用介绍(3)
代码如下: [root@localhost lv01]# mkdir /mnt/lv-backup [root@localhost mnt]# mount -o ro /dev/vg0/lv-backup /mnt/lv-backup/ 4、备份快照 代码如下: [root@localhost tmp]# dump -0u -f /tmp/lv-
代码如下:
[root@localhost lv01]# mkdir /mnt/lv-backup
[root@localhost mnt]# mount -o ro /dev/vg0/lv-backup /mnt/lv-backup/
4、备份快照
代码如下:
[root@localhost tmp]# dump -0u -f /tmp/lv-backup.dump /mnt/lv-backup/ //备份
DUMP: Date of this level 0 dump: Sun Nov 11 14:53:31 2012
DUMP: Dumping /dev/mapper/vg0-lv--backup (/mnt/lv-backup) to /tmp/lv-backup.dump
5、删除快照
代码如下:
[root@localhost tmp]# umount /mnt/lv-backup/
[root@localhost tmp]# lvremove /dev/vg0/lv-backup
Do you really want to remove active logical volume lv-backup? [y/n]: y
Logical volume "lv-backup" successfully removed
6、清空/dev/vg0/lv01下得内容
代码如下:
[root@localhost tmp]# umount /mnt/lv01
[root@localhost tmp]# mkfs.ext3 /dev/vg0/lv01
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux
7、lvm的关闭
代码如下:
[root@localhost ~]# umount /mnt/lv01
[root@localhost ~]# lvremove /dev/vg0/lv01 //删除lv
Do you really want to remove active logical volume lv01? [y/n]: y
Logical volume "lv01" successfully removed
[root@localhost ~]# vgchange -a n vg0 //使vg0不具有active标志
0 logical volume(s) in volume group "vg0" now active
[root@localhost ~]# vgremove vg0 //删除vg
Volume group "vg0" successfully removed
[root@localhost ~]# pvremove /dev/sda5 //删除pv
Labels on physical volume "/dev/sda5" successfully wiped
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