root@tofo2 ~]# df -ha
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1             7.6G  4.8G  2.5G  67% /
proc                     0     0     0   -  /proc
sysfs                    0     0     0   -  /sys
devpts                   0     0     0   -  /dev/pts
tmpfs                 125M     0  125M   0% /dev/shm
none                     0     0     0   -  /proc/sys/fs/binfmt_misc
sunrpc                   0     0     0   -  /var/lib/nfs/rpc_pipefs

[root@tofo2 ~]# echo 1 > /proc/fs/cifs/MultiuserMount
[root@tofo2 ~]# dmesg
[root@tofo2 ~]#  mount -t cifs -o user=tom //tofo1/home1 /mnt/1
Password:

[root@tofo2 ~]# df -ha
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1             7.6G  4.8G  2.5G  67% /
proc                     0     0     0   -  /proc
sysfs                    0     0     0   -  /sys
devpts                   0     0     0   -  /dev/pts
tmpfs                 125M     0  125M   0% /dev/shm
none                     0     0     0   -  /proc/sys/fs/binfmt_misc
sunrpc                   0     0     0   -  /var/lib/nfs/rpc_pipefs
//tofo1/home1         7.6G  2.5G  4.7G  35% /mnt/1
[root@tofo2 ~]#  mount -t cifs -o user=max //tofo1/home2 /mnt/2
Password:               #falsches password
mount error 13 = Permission denied
Refer to the mount.cifs(8) manual page (e.g.man mount.cifs)

[root@tofo2 ~]# df -ha
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1             7.6G  4.8G  2.5G  67% /
proc                     0     0     0   -  /proc
sysfs                    0     0     0   -  /sys
devpts                   0     0     0   -  /dev/pts
tmpfs                 125M     0  125M   0% /dev/shm
none                     0     0     0   -  /proc/sys/fs/binfmt_misc
sunrpc                   0     0     0   -  /var/lib/nfs/rpc_pipefs
//tofo1/home1         0.0K  0.0K  0.0K   -  /mnt/1
[root@tofo2 ~]# stat /mnt/1
stat: cannot stat `/mnt/1': Input/output error