Trouble with mount

[Rick Lim]

Having just loaded a new hard drive with FC3 I wanted to mount that drive on
a working system to modify and copy some files on to it, so I have tried to
mount the disk but I get this error, can anyone help?

Here's what I do

[root at d64-180-18-237 ~]# mount -t ext3 /dev/hdc2 /nd
mount: /dev/hdc2 already mounted or /nd busy
[root at d64-180-18-237 ~]# mount
/dev/hda2 on / type ext3 (rw)
none on /proc type proc (rw)
none on /sys type sysfs (rw)
none on /dev/pts type devpts (rw,gid=5,mode=620)
usbfs on /proc/bus/usb type usbfs (rw)
/dev/hda1 on /boot type ext3 (rw)
none on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)