How to wipe a disk quickly in solaris

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#!/bin/bash

#Note: Pls do not try This in prod servers.
#used to wipe a disk
echo Run the folowing
for DISK in `ls /dev/dsk/c[01234]*s2 | sed -e 's/\/dev\/dsk\///'`;
do
        echo format -f /fsys1/wipe/wipe_input_file -l ./log$DISK $DISK \> /dev/null \&;
done