# ls /dev/dm*
/dev/dm-3  /dev/dm-4  /dev/dm-5  /dev/dm-6  /dev/dm-7  /dev/dm-8

# df -Ph
Filesystem                                    Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-lv_root                24G   9.1G   13G  42% /
/dev/sda1                                     494M  18M    451M  4% /boot
tmpfs                                         48G   4.0M   48G   1% /dev/shm
/dev/mapper/storagep1 1008G                   1008G 923G   35G  97% /d
/dev/mapper/VolGroup00-lv_data                102G  4.5G   93G   5% /oracle/app
/dev/dm-7                                     284G  105G  165G  39% /d2
/dev/mapper/storage3p1                        296G  222G   59G  80% /d3

# ls -la /dev/mapper/
total 0
drwxr-xr-x  2 root root     240 Sep  4 22:51 .
drwxr-xr-x 13 root root    5060 Sep  5 11:13 ..
crw-------  1 root root  10, 60 Sep  4 22:51 control
brw-rw----  1 root disk 253,  4 Sep  4 22:51 mpath3
brw-rw----  1 root disk 253,  7 Sep  4 22:51 mpath3p1
brw-rw----  1 root disk 253,  3 Sep  4 22:51 storage
brw-rw----  1 root disk 253,  5 Sep  4 22:51 storage3
brw-rw----  1 root disk 253,  6 Sep  4 22:51 storage3p1
brw-rw----  1 root disk 253,  8 Sep  4 22:51 storagep1
brw-rw----  1 root disk 253,  2 Sep  4 22:51 VolGroup00-lv_data
brw-rw----  1 root disk 253,  0 Sep  4 22:51 VolGroup00-lv_root
brw-rw----  1 root disk 253,  1 Sep  4 22:51 VolGroup00-lv_swap