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Mount point busy or already mounted error – CentOS

Monday, October 15th, 2012 - 4:45 pm - System Administration

 

Recently when my servers HDD dead, data center installed a new HDD keeping orginal HDD as secondary so that i can copy data back to new HDD.

I tried to mount the HDD normal way, but got the error:-

[root@server78 ~]# fdisk -l /dev/hda
 
 Disk /dev/hda: 160.0 GB, 160041885696 bytes
 255 heads, 63 sectors/track, 19457 cylinders
 Units = cylinders of 16065 * 512 = 8225280 bytes
 
    Device Boot      Start         End      Blocks   Id  System
 /dev/hda1   *           1          13      104391   83  Linux
 /dev/hda2              14       19457   156183930   8e  Linux LVM
 
 [root@server78 ~]# mount /dev/hda2 /tmp/mnt
 mount: /dev/hda2 already mounted or /tmp/mnt busy

The old drive is lvm. you were trying to mount it like it was an ext3 filesystem. I have listed what i did below so you can see it.

Now we need to check the old disk is using LVM ? type:-

[root@server78 ~]# pvs
PV         VG         Fmt  Attr PSize   PFree
/dev/hda2  VolGroup01 lvm2 a-   148.94G 32.00M
/dev/hdb2  VolGroup00 lvm2 a-   114.94G 96.00M

So now we know our second hard disk VolumeGroup name is “VolGroup00”, now we can mount it like:-

[root@server78 ~]# mount /dev/VolGroup01/LogVol00 /mnt

That’s it, you can see the folders in /mnt/, Edit/copy as you like.