mount挂载硬盘出错mount you must specify the filesystem type lvm？

解决linux下mount lvm硬盘出错的问题

我的机器两个硬盘,一个80g的做的lvm 是我从别的机器上拿下来的,上面有数据.我想在我现在的系统上挂载它,可不行,高人给点指点!!!!!!
[root@all /]# fdisk -l
Disk /dev/hdc: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/hdc1 * 1 13 104391 83 Linux
/dev/hdc2 14 9729 78043770 8e Linux LVM

Disk /dev/hda: 40.0 GB, 40020664320 bytes
255 heads, 63 sectors/track, 4865 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/hda1 * 1 255 2048256 83 Linux
/dev/hda2 256 3934 29551567+ 83 Linux
/dev/hda3 3935 4444 4096575 83 Linux
/dev/hda4 4445 4865 3381682+ f Win95 Ext'd (LBA)
/dev/hda5 4445 4699 2048256 83 Linux
/dev/hda6 4700 4801 819283+ 83 Linux
/dev/hda7 4802 4865 514048+ 82 Linux swap
[root@all /]# mount /dev/hdc2 /mnt/cdrom
mount: you must specify the filesystem type
mount 时出线上面的错误!谁给点提示!谢谢!

回答：

1.先用vgscan
2.vgchange -ay
3.lvscan
4.mount

到第三步的时候如果正常会显示出两块硬盘的lv状态都是active，此时再

#mount -t ext3 /dev/VGname/LVname /mnt/cdrom

就可以成功了。