А что Вы туда монтировали?
1cat /etc/fstab
2ls /mnt/
3sudo blkid
4mount
??
1# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda6 during installation
UUID=8d12a479-7503-4092-93db-c7061045a037 / ext4 errors=remount-ro 0 1
# swap was on /dev/sda5 during installation
UUID=e6e420ab-47b7-43a3-a88b-14cd147352ed none swap sw 0 0
UUID=2A3C6F523C6F17D9 /mnt/2A3C6F523C6F17D9 auto nosuid,nodev,nofail,x-gvfs-show,x-gvfs-name=Windows 0 0
UUID=3CFEA384FEA33554 /mnt/3CFEA384FEA33554 auto nosuid,nodev,nofail,x-gvfs-show 0 0
none /proc/bus/usb usbfs devgid=126,devmode=664 0 0
2 2A3C6F523C6F17D9 3CFEA384FEA33554
3 /dev/sda1: LABEL="SYSTEM" UUID="02A263F1A263E81D" TYPE="ntfs"
/dev/sda2: LABEL="WINDOWS" UUID="2A3C6F523C6F17D9" TYPE="ntfs"
/dev/sda3: LABEL="TehnoStyle" UUID="3CFEA384FEA33554" TYPE="ntfs"
/dev/sda5: UUID="e6e420ab-47b7-43a3-a88b-14cd147352ed" TYPE="swap"
/dev/sda6: UUID="8d12a479-7503-4092-93db-c7061045a037" TYPE="ext4"
4 /dev/sda6 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/cgroup type tmpfs (rw)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755)
none on /sys/fs/pstore type pstore (rw)
/dev/sda3 on /mnt/3CFEA384FEA33554 type fuseblk (rw,nosuid,nodev,allow_other,blksize=4096)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
systemd on /sys/fs/cgroup/systemd type cgroup (rw,noexec,nosuid,nodev,none,name=systemd)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,user=pav)