1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 | #!/bin/bash # Skript to rescan SCSI bus, using the # scsi add-single-device mechanism # (w) 1998-03-19 Kurt Garloff <kurt@garloff.de> (c) GNU GPL # (w) 2003-07-16 Kurt Garloff <garloff@suse.de> (c) GNU GPL # $Id: rescan-scsi-bus.sh,v 1.15 2004/05/08 14:47:13 garloff Exp $ setcolor () { red="\e[0;31m" green="\e[0;32m" yellow="\e[0;33m" norm="\e[0;0m" } unsetcolor () { red=""; green="" yellow=""; norm="" } # Return hosts. sysfs must be mounted findhosts_26 () { hosts= if ! ls /sys/class/scsi_host/host* >/dev/null 2>&1; then echo "No SCSI host adapters found in sysfs" exit 1; #hosts=" 0" #return fi for hostdir in /sys/class/scsi_host/host*; do hostno=${hostdir#/sys/class/scsi_host/host} hostname=`cat $hostdir/proc_name` hosts="$hosts $hostno" echo "Host adapter $hostno ($hostname) found." done } # Return hosts. /proc/scsi/HOSTADAPTER/? must exist findhosts () { hosts= for driverdir in /proc/scsi/*; do driver=${driverdir#/proc/scsi/} if test $driver = scsi -o $driver = sg -o $driver = dummy -o $driver = device_info; then continue; fi for hostdir in $driverdir/*; do name=${hostdir#/proc/scsi/*/} if test $name = add_map -o $name = map -o $name = mod_parm; then continue; fi num=$name driverinfo=$driver if test -r $hostdir/status; then num=$(printf '%d\n' `sed -n 's/SCSI host number://p' $hostdir/status`) driverinfo="$driver:$name" fi hosts="$hosts $num" echo "Host adapter $num ($driverinfo) found." done done } # Test if SCSI device $host $channen $id $lun exists # Outputs description from /proc/scsi/scsi, returns new testexist () { grepstr="scsi$host Channel: 0*$channel Id: 0*$id Lun: 0*$lun" new=`cat /proc/scsi/scsi | grep -e"$grepstr"` if test ! -z "$new"; then cat /proc/scsi/scsi | grep -e"$grepstr" cat /proc/scsi/scsi | grep -A2 -e"$grepstr" | tail -n2 | pr -o4 -l1 fi } # Perform search (scan $host) dosearch () { for channel in $channelsearch; do for id in $idsearch; do for lun in $lunsearch; do new= devnr="$host $channel $id $lun" echo "Scanning for device $devnr ..." printf "${yellow}OLD: $norm" testexist if test ! -z "$remove" -a ! -z "$new"; then # Device exists and we're in remove mode, so remove and readd echo "scsi remove-single-device $devnr" >/proc/scsi/scsi echo "scsi add-single-device $devnr" >/proc/scsi/scsi printf "\r\x1b[A\x1b[A\x1b[A${yellow}OLD: $norm" testexist if test -z "$new"; then printf "\r${red}DEL: $norm\r\n\n\n\n"; let rmvd+=1; fi fi if test -z "$new"; then # Device does not exist, try to add printf "\r${green}NEW: $norm" echo "scsi add-single-device $devnr" >/proc/scsi/scsi testexist if test -z "$new"; then # Device not present printf "\r\x1b[A"; # Optimization: if lun==0, stop here (only if in non-remove mode) if test $lun = 0 -a -z "$remove" -a $optscan = 1; then break; fi else let found+=1; fi fi done done done } # main if test @$1 = @--help -o @$1 = @-h -o @$1 = @-?; then echo "Usage: rescan-scsi-bus.sh [options] [host [host ...]]" echo "Options:" echo " -l activates scanning for LUNs 0-7 [default: 0]" echo " -w scan for target device IDs 0 .. 15 [default: 0-7]" echo " -c enables scanning of channels 0 1 [default: 0]" echo " -r enables removing of devices [default: disabled]" echo "--remove: same as -r" echo "--nooptscan: don't stop looking for LUNs is 0 is not found" echo "--color: use coloured prefixes OLD/NEW/DEL" echo "--hosts=LIST: Scan only host(s) in LIST" echo "--channels=LIST: Scan only channel(s) in LIST" echo "--ids=LIST: Scan only target ID(s) in LIST" echo "--luns=LIST: Scan only lun(s) in LIST" echo " Host numbers may thus be specified either directly on cmd line (deprecated) or" echo " or with the --hosts=LIST parameter (recommended)." echo "LIST: A[-B][,C[-D]]... is a comma separated list of single values and ranges" echo " (No spaces allowed.)" exit 0 fi expandlist () { list=$1 result="" first=${list%%,*} rest=${list#*,} while test ! -z "$first"; do beg=${first%%-*}; if test "$beg" = "$first"; then result="$result $beg"; else end=${first#*-} result="$result `seq $beg $end`" fi test "$rest" = "$first" && rest="" first=${rest%%,*} rest=${rest#*,} done echo $result } if test ! -d /proc/scsi/; then echo "Error: SCSI subsystem not active" exit 1 fi # defaults unsetcolor lunsearch="0" idsearch=`seq 0 7` channelsearch="0" remove="" optscan=1 if test -d /sys/class/scsi_host; then findhosts_26 else findhosts fi # Scan options opt="$1" while test ! -z "$opt" -a -z "${opt##-*}"; do opt=${opt#-} case "$opt" in l) lunsearch=`seq 0 7` ;; w) idsearch=`seq 0 15` ;; c) channelsearch="0 1" ;; r) remove=1 ;; -remove) remove=1 ;; -hosts=*) arg=${opt#-hosts=}; hosts=`expandlist $arg` ;; -channels=*) arg=${opt#-channels=};channelsearch=`expandlist $arg` ;; -ids=*) arg=${opt#-ids=}; idsearch=`expandlist $arg` ;; -luns=*) arg=${opt#-luns=}; lunsearch=`expandlist $arg` ;; -color) setcolor ;; -nooptscan) optscan=0 ;; *) echo "Unknown option -$opt !" ;; esac shift opt="$1" done # Hosts given ? if test "@$1" != "@"; then hosts=$*; fi echo "Scanning hosts $hosts channels $channelsearch for " echo " SCSI target IDs " $idsearch ", LUNs " $lunsearch test -z "$remove" || echo " and remove devices that have disappeared" declare -i found=0 declare -i rmvd=0 for host in $hosts; do dosearch; done echo "$found new device(s) found. " echo "$rmvd device(s) removed. " |
Linux Shell Script To Backup and Restore MBR (Master Boot Recored)
in Categories Diskadmin last updated December 3, 2010mbrback shell script creates a backup of your hard drive’s MBR and its partition table. You can then use mbrback to restore the MBR boot code, full MBR, or partition table from the backup files.