#! /bin/bash
#----------------------------------------------------------------------
# Description: a simple script to remove SCSI devices
# Author: Artem S. Tashkinov <no-mail@no-mail.com>
# Created at: Tue Sep 15 18:30:41 YEKST 2009
# Computer: localhost.localdomain
# System: Linux 2.6.31-k8l on i686
#
# Copyright (c) 2009 Artem S. Tashkinov  All rights reserved.
#
#----------------------------------------------------------------------

strhb="hot-pluggable SCSI devices"
DEVLIST=/proc/scsi/scsi

i=1
while read item; do
        d_id[$i]="$item"
        i=$((i+1))
done < <(awk '/Host/{var=$2" "$4" "$6" "$8;gsub(/00/,"0",var);print substr(var,5)}' "$DEVLIST")

i=1
while read item; do
        d_name[$i]="$item"
        i=$((i+1))
done < <(awk -F 'Vendor: | Model: | Rev: ' '/Vendor/{print $2,$3}' "$DEVLIST")

if [ $i -le 1 ]; then
        echo "No removable $strhb found. Exiting"
        exit
fi

echo "We have found the following $strhb:"
for ((x = 1 ; x < $i ; x++)); do
        echo " $x: ${d_name[$x]}" | sed 's/ATA/HDD/'
done

echo -n "Please, enter a device number to remove or 0 to exit: "
read devn

if ! [ "$devn" -eq "$devn" 2> /dev/null ]; then
        echo "Error: $devn isn't a number, bye."
        exit 2
fi

if [ "$devn" -lt 1 -o "$devn" -ge $i -o "$devn" -eq 0 ]; then
        echo "No action taken, bye."
        exit
fi

echo "scsi remove-single-device ${d_id[$devn]}" > /proc/scsi/scsi
echo "Done. Consult with dmesg to find out if the device was actually removed"