Install Logical Volume Manager:

	# aptitude install lvm2

or

	# yum install lvm2

Determine the volume group containing the physical volume:

	# pvs
		PV         VG   Fmt  Attr PSize  PFree
		/dev/sdd1  DB   lvm2 a-   33.91G    0 
		/dev/sde1  DB   lvm2 a-   33.91G    0

List the logical volumes in DB.

	# lvdisplay DB
		  --- Logical volume ---
	  LV Name                /dev/DB/mysql
	  VG Name                DB
	  LV UUID                LGCeR3-oBsr-66lG-fmUt-8CBc-vcpl-ga7Ro8
	  LV Write Access        read/write
	  LV Status              available
	  # open                 1
	  LV Size                67.83 GB
	  Current LE             17364
	  Segments               2
	  Allocation             inherit
	  Read ahead sectors     auto
	  - currently set to     256
	  Block device           254:0

Mount

	# mount /dev/DB/mysql /tmp/mysql