See "man sudo_root" for details.
Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000080

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        6079    48827392   83  Linux
/dev/sda2            6079       14594    68390913    5  Extended
/dev/sda5            6079       12158    48827392   83  Linux
/dev/sda6           12158       12404     1971200   82  Linux swap / Solaris
/dev/sda7           12404       14594    17590272   83  Linux

Disk /dev/sdb: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0007adb6

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2433       38913   293033632+  83  Linux

love@ubuntu:~$ sudo mkdir /mnt/sdb1 ; sudo mount -t auto /dev/sdb1 /mnt/sdb1
mkdir: cannot create directory `/mnt/sdb1': File exists
mount: /dev/sdb1 already mounted or /mnt/sdb1 busy
mount: according to mtab, /dev/sdb1 is already mounted on /mnt/sdb1
love@ubuntu:~$ sudo mkdir /mnt/sdb1 ; sudo mount -t auto /dev/sdb1 /mnt/sdb1
mkdir: cannot create directory `/mnt/sdb1': File exists
mount: /dev/sdb1 already mounted or /mnt/sdb1 busy
mount: according to mtab, /dev/sdb1 is already mounted on /mnt/sdb1
love@ubuntu:~$  sudo mount  
/dev/sda7 on / type ext4 (rw,errors=remount-ro,commit=0)
proc on /proc type proc (rw,noexec,nosuid,nodev)
none on /sys type sysfs (rw,noexec,nosuid,nodev)
fusectl on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /dev type devtmpfs (rw,mode=0755)
none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
none on /dev/shm type tmpfs (rw,nosuid,nodev)
none on /var/run type tmpfs (rw,nosuid,mode=0755)
none on /var/lock type tmpfs (rw,noexec,nosuid,nodev)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
gvfs-fuse-daemon on /home/love/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=love)
/dev/sdb1 on /media/New Volume type ext4 (rw,nosuid,nodev,uhelper=udisks)
/dev/sdb1 on /mnt/sdb1 type ext4 (rw)