Someone

vs5714:/# dd if=/dev/urandom of=/dev/hdv1 bs=1024k
780+0 records in
780+0 records out
817889280 bytes transferred in 260.088833 seconds (3144654 bytes/sec)

vs5714:/# ls
bin   cdrom  etc     initrd  lost+found  mysql  proc  sbin  tmp  var
boot  dev    floppy  lib     mnt         opt    root  sys   usr
vs5714:/# mount -a
mount: permission denied
vs5714:/#