Sander, here's the outputs for the two commands
I used the following command to mount
mount /dev/sda /mnt/


[root@usbnode1 ~]# fdisk -l
WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.

Disk /dev/sda: 160.0 GB, 160000000000 bytes, 312500000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: gpt

#         Start          End    Size  Type            Name
 1         2048    312499966    149G  Linux filesyste
 2           34         2047   1007K  Linux filesyste
WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.

Disk /dev/mapper/ST3160815AS_9RXCL4HB: 160.0 GB, 160000000000 bytes, 312500000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: gpt

#         Start          End    Size  Type            Name
 1         2048    312499966    149G  Linux filesyste
 2           34         2047   1007K  Linux filesyste

Disk /dev/mapper/ST3160815AS_9RXCL4HB1: 160.0 GB, 159998934528 bytes, 312497919 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/ST3160815AS_9RXCL4HB2: 1 MB, 1031168 bytes, 2014 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.

Disk /dev/sdb: 7803 MB, 7803174912 bytes, 15240576 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: gpt

#         Start          End    Size  Type            Name
 1         2048       499711    243M  BIOS boot parti primary
 2       499712      1499135    488M  EFI System      primary
 3      1499136      2500607    489M  Microsoft basic primary
 4      2500608     15239167    6.1G  Linux LVM       primary
WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.

Disk /dev/mapper/Kingston_DataTraveler_2.0_C860008863CCED91EA06003B-0:0: 7803 MB, 7803174912 bytes, 15240576 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: gpt

#         Start          End    Size  Type            Name
 1         2048       499711    243M  BIOS boot parti primary
 2       499712      1499135    488M  EFI System      primary
 3      1499136      2500607    489M  Microsoft basic primary
 4      2500608     15239167    6.1G  Linux LVM       primary

Disk /dev/mapper/Kingston_DataTraveler_2.0_C860008863CCED91EA06003B-0:0p1: 254 MB, 254803968 bytes, 497664 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/Kingston_DataTraveler_2.0_C860008863CCED91EA06003B-0:0p2: 511 MB, 511705088 bytes, 999424 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/Kingston_DataTraveler_2.0_C860008863CCED91EA06003B-0:0p3: 512 MB, 512753664 bytes, 1001472 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/Kingston_DataTraveler_2.0_C860008863CCED91EA06003B-0:0p4: 6522 MB, 6522142720 bytes, 12738560 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/live-rw: 1610 MB, 1610612736 bytes, 3145728 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/HostVG-Swap: 3095 MB, 3095396352 bytes, 6045696 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/HostVG-Config: 8 MB, 8388608 bytes, 16384 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/HostVG-Logging: 2147 MB, 2147483648 bytes, 4194304 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/HostVG-Data: 1266 MB, 1266679808 bytes, 2473984 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


[root@usbnode1 ~]# blockdev --report
RO    RA   SSZ   BSZ   StartSec            Size   Device
rw  1024   512  4096          0    160000000000   /dev/sda
rw  1024   512   512       2048    159998934528   /dev/sda1
rw  1024   512  1024         34         1031168   /dev/sda2
rw   256   512  4096          0    160000000000   /dev/dm-0
rw   256   512   512          0    159998934528   /dev/dm-1
rw   256   512  1024          0         1031168   /dev/dm-2
rw   256   512  4096          0      7803174912   /dev/sdb
rw   256   512  4096       2048       254803968   /dev/sdb1
rw   256   512  4096     499712       511705088   /dev/sdb2
rw   256   512  4096    1499136       512753664   /dev/sdb3
rw   256   512  4096    2500608      6522142720   /dev/sdb4
rw   256   512  4096          0      7803174912   /dev/dm-3
rw   256   512  4096          0       254803968   /dev/dm-4
rw   256   512  4096          0       511705088   /dev/dm-5
rw   256   512  1024          0       512753664   /dev/dm-6
rw   256   512  4096          0      6522142720   /dev/dm-7
rw   256   512  4096          0      1610612736   /dev/dm-8
rw   256   512  4096          0      3095396352   /dev/dm-9
rw   256   512  1024          0         8388608   /dev/dm-10
rw   256   512  4096          0      2147483648   /dev/dm-11
rw   256   512  4096          0      1266679808   /dev/dm-12



On Mon, Dec 23, 2013 at 1:43 PM, Sander Grendelman <sander@grendelman.com> wrote:
On Mon, Dec 23, 2013 at 8:23 AM, Nauman Abbas <nauman.abbas@seecs.edu.pk> wrote:
> Hello all
>
> I'm booting oVirt node from USB and want to use my hard drive for storing
> VMs and stuff. When I have booted the node from USB I try to mount the hard
> drive into a folder in the file-system but I am getting the following error.
>
> mount: /dev/sda1 is already mounted or /mnt busy
>
> Anyone who knows about this error?

Could it be that /dev/sda is your USB drive?
What is the output of
fdisk -l
blockdev --report
?



--

Nauman Abbas
Assistant System Administrator (LMS),
Room No. A-207, SEECS,
National University of Sciences & Technology,
+ 92 321 5359946