System:    Host: lappi Kernel: 3.3.0-4.dmz.1-liquorix-amd64 x86_64 (64 bit, gcc: 4.6.3)
           Desktop: KDE 4.8.2 (Qt 4.8.1) Distro: Ubuntu 12.04 precise
Machine:   System: LENOVO (portable) product: 1951CA2 version: ThinkPad T60 Chassis: type: 10
           Mobo: LENOVO model: 1951CA2 Bios: LENOVO version: 79ETE7WW (2.27 ) date: 03/21/2011
CPU:       Dual core Intel Core2 CPU T7200 (-MCP-) clocked at 1000.00 MHz
Graphics:  Card: Intel Mobile 945GM/GMS 943/940GML Express Integrated Graphics Controller bus-ID: 00:02.0
           X.Org: 1.11.3 drivers: intel (unloaded: vesa,fbdev) Resolution: 1024x768@60.0hz
           GLX Renderer: Mesa DRI Intel 945GM GLX Version: 1.4 Mesa 8.0.2 Direct Rendering: Yes
Network:   Card-1: Intel PRO/Wireless 3945ABG [Golan] Network Connection driver: iwl3945 ver: in-tree:s bus-ID: 03:00.0
           Card-2: Intel 82573L Gigabit Ethernet Controller driver: e1000e ver: 1.5.1-k port: 2000 bus-ID: 02:00.0
Drives:    HDD Total Size: 80.0GB (38.7% used)
Info:      Processes: 129 Uptime: 49 min Memory: 973.9/3006.7MB Runlevel: 2 Gcc sys: 4.6.3 alt: 4.5
           Client: Shell inxi: 1.7.36

#!/bin/sh
# change-ioscheduler.sh [elevator]

function print_ioschedulers {
   for i in `find /sys/block/*/queue/scheduler`; do
      block_device="$(echo -n $i | sed -r 's|/sys/block/([a-z0-9]+)/queue/scheduler|\1|')"
      ioschedulers="$(cat $i)"
      
      echo "$block_device: $ioschedulers"
   done
}

function change_current_ioscheduler {
   new_ioscheduler="$1"
   
   for i in `find /sys/block/*/queue/scheduler`; do
      echo $new_ioscheduler > $i
   done
}

if [ -z "$1" ] ; then
   echo -e "current block devices and elevators\n"
   print_ioschedulers
else
   change_current_ioscheduler $1
   
   echo -e "new elevator configuration\n"
   print_ioschedulers
fi

exit 0