/host/ubuntu/disks/root.disk 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)
lrm on /lib/modules/2.6.24-19-generic/volatile type tmpfs (rw)
/host/ubuntu/disks/boot on /boot type none (rw,bind)
securityfs on /sys/kernel/security type securityfs (rw)
gvfs-fuse-daemon on /home/guandl/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=guandl)
/dev/sdc1 on /media/disk type vfat (rw,nosuid,nodev,uhelper=hal,shortname=mixed,uid=1000,utf8,umask=077,flush)
可以看到，/dev/sdb1已经不在挂接范围了