#!/bin/bash
INT=0
read -p "Please enter news host*:" SHURU
while  [ $INT -le $SHURU ]
do
 echo "- - -" >> /sys/class/scsi_host/host$INT/scan
 let INT++
done

if [ $? -eq 0 ]
then
 echo "news host succer!"
else
 echo "NO,Please retry"
fi

host一般大于等于30足以。