root@ubuntu:~# sudo mount /dev/sda5 /media/disk
root@ubuntu:~# mount
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
tmpfs on /lib/modules/2.6.22-14-generic/volatile type tmpfs (rw,mode=0755)
tmpfs on /lib/modules/2.6.22-14-generic/volatile type tmpfs (rw,mode=0755)
varrun on /var/run type tmpfs (rw,noexec,nosuid,nodev,mode=0755)
varlock on /var/lock type tmpfs (rw,noexec,nosuid,nodev,mode=1777)
udev on /dev type tmpfs (rw,mode=0755)
devshm on /dev/shm type tmpfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev)
/dev/sda5 on /media/disk type ext3 (rw)
root@ubuntu:~# sudo mount -t proc none /media/disk/proc
root@ubuntu:~# sudo mount -t none /dev /media/disk/dev -o bind
root@ubuntu:~# 
root@ubuntu:~# 
root@ubuntu:~# mount
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
tmpfs on /lib/modules/2.6.22-14-generic/volatile type tmpfs (rw,mode=0755)
tmpfs on /lib/modules/2.6.22-14-generic/volatile type tmpfs (rw,mode=0755)
varrun on /var/run type tmpfs (rw,noexec,nosuid,nodev,mode=0755)
varlock on /var/lock type tmpfs (rw,noexec,nosuid,nodev,mode=1777)
udev on /dev type tmpfs (rw,mode=0755)
devshm on /dev/shm type tmpfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev)
/dev/sda5 on /media/disk type ext3 (rw)
none on /media/disk/proc type proc (rw)
/dev on /media/disk/dev type none (rw,bind)
/dev on /media/disk/dev type none (rw,bind)
root@ubuntu:~# sudo chroot /media/disk
root@ubuntu:/# 
root@ubuntu:/# 
root@ubuntu:/# mount
/dev/sda7 on / type ext3 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
/sys on /sys type sysfs (rw,noexec,nosuid,nodev)
varrun on /var/run type tmpfs (rw,noexec,nosuid,nodev,mode=0755)
varlock on /var/lock type tmpfs (rw,noexec,nosuid,nodev,mode=1777)
udev on /dev type tmpfs (rw,mode=0755)
devshm on /dev/shm type tmpfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
/dev/sda5 on /media/sda5 type ext3 (rw)
none on /media/sda5/proc type proc (rw)
/dev on /media/sda5/dev type none (rw,bind)
root@ubuntu:/# mount |grep sda
/dev/sda7 on / type ext3 (rw,errors=remount-ro)
/dev/sda5 on /media/sda5 type ext3 (rw)
none on /media/sda5/proc type proc (rw)
/dev on /media/sda5/dev type none (rw,bind)
root@ubuntu:/#