Talk:How to hotswap Ultrabay devices

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Recent Ubuntu versions

I think, it must be mentioned that hotswapping Ultrabay devices using recent distros is by far not that hard as before. I'm using Ubuntu 9.04 on Z61m and in my case hotswapping Ultrabay DVD-RW works out-of-the-box without any scripts or whatsoever. The article however suggests that one always needs some ejecting scripts which might confuse certain users. So it would be nice to add something like: "If you are using Ubuntu *.** everything should work out-of-the-box"

--Bombenbach 12:01, 9 August 2009 (UTC)

Really? Did you try to swap out a Ultrabay device with mounted filesystem? Good luck! The udev handler and eject script are there for a reason. By default no action is taken when you pull out a device, which can cause real problems if not handled properly.

--Tonko 09:31, 10 August 2009 (UTC)

Well, actually I couldn't imagine that someone would like to pull out an Ultrabay device with mounted file system. As far a usb flash drives are concerned, you won't do that either, right? My point was, that if the file system is properly unmounted, I can simply pull my Ultrabay DVD-RW out without any freezes or crashes. And when I put it back again, the drive is automatically recognized by Ubuntu so that I can use it. I don't have an Ultrabay HDD, but I assume that if it works with DVD-RW it also should work with HDD. Correct me if I'm wrong. If the sole purpose of eject script is hotswapping Ultrabay devices with mounted filesystem then I still think that it would be nice to point it out in the article.

--Bombenbach 07:52, 11 August 2009 (UTC)

By default on most modern distributions based on a recent kernel with libata, the libata driver gets to cleanup the mess after the fact, if you pull out an ultrabay device without first

  • unmounting the filesystem
  • powering down the device

You may be lucky, or you might end up with a hung system, corrupted filesystem, etc. Your choice.

There is work going on upstream to resolve this with DeviceKit-disks, but that depends on a patch to the Linux kernel, which has not made it in yet, since right now there is no correlation between the udev event and the actual Bay device, and since you can have multiple Bay devices (in fact your ThinkPad likely has 3) this correlation is needed, otherwise DeviceKit-disks would need to know about every single Laptop out there and the mapping between the Bay numbering and the actual devices (something the kernel can easily just provide instead).

Here is a Feature request against DeviceKit-disks that provides some status information

--Tonko 09:07, 11 August 2009 (UTC)

HAL script

If the script works, your lshal output should contain something similar to this. In this case the Ultrabay device was a second HDD (/dev/sdb).

Note that in the example, storage.hotpluggable = true while before it was false, so the script worked.

udi = '/org/freedesktop/Hal/devices/storage_serial_SATA_HTS726060M9AT00_MRH453M4H11ARB'
  block.device = '/dev/sdb'  (string)
  block.is_volume = false  (bool)
  block.major = 8  (0x8)  (int)
  block.minor = 16  (0x10)  (int)
  block.storage_device = '/org/freedesktop/Hal/devices/storage_serial_SATA_HTS726060M9AT00_MRH453M4H11ARB'  (string)
  info.capabilities = {'storage', 'block'} (string list)
  info.category = 'storage'  (string)
  info.parent = '/org/freedesktop/Hal/devices/pci_8086_24ca_scsi_host_0_scsi_device_lun0'  (string)
  info.product = 'HTS726060M9AT00'  (string)
  info.udi = '/org/freedesktop/Hal/devices/storage_serial_SATA_HTS726060M9AT00_MRH453M4H11ARB'  (string)
  info.vendor = 'ATA'  (string)
  linux.hotplug_type = 3  (0x3)  (int)
  linux.sysfs_path = '/sys/devices/pci0000:00/0000:00:1f.1/host1/target1:0:0/1:0:0:0/block/sdb'  (string)
  storage.automount_enabled_hint = true  (bool)
  storage.bus = 'pci'  (string)
  storage.drive_type = 'disk'  (string)
  storage.firmware_version = 'MH4O'  (string)
  storage.hotpluggable = true  (bool)
  storage.lun = 0  (0x0)  (int)
  storage.media_check_enabled = false  (bool)
  storage.model = 'HTS726060M9AT00'  (string)
  storage.no_partitions_hint = false  (bool)
  storage.originating_device = '/org/freedesktop/Hal/devices/computer'  (string)
  storage.partitioning_scheme = 'mbr'  (string)
  storage.removable = false  (bool)
  storage.removable.media_available = true  (bool)
  storage.removable.media_size = 60011642880  (0xdf8f90000)  (uint64)
  storage.requires_eject = false  (bool)
  storage.serial = 'SATA_HTS726060M9AT00_MRH453M4H11ARB'  (string)
  storage.size = 60011642880  (0xdf8f90000)  (uint64)
  storage.vendor = 'ATA'  (string)
Known South Bridge PCI IDs
ID ThinkPad model South Bridge chip (for Ultrabay) parent device (host_0, lun0 = 2nd ATA controller, master device)
8086_7111 A20m, A20p, A21e, A21m, A21p, A22e, A22m, A22p, T20, T21, T22, X20, X21 Intel 82371AB/EB/MB PIIX4 IDE /org/freedesktop/Hal/devices/pci_8086_7111_scsi_host_0_scsi_device_lun0
8086_248a T23, T30, X22, X23, X24, X30 Intel 82801CAM IDE U100 (rev 2) /org/freedesktop/Hal/devices/pci_8086_248a_scsi_host_0_scsi_device_lun0
8086_248a A30, A30p, A31, A31p Intel 82801CAM IDE U100 (rev 2) /org/freedesktop/Hal/devices/pci_8086_248a_scsi_host_scsi_device_lun0_0
8086_24ca R50, R51, T40, T40p, T41, T41p, T42, T42p, X31, X32, X40 Intel 82801DBM (ICH4-M) /org/freedesktop/Hal/devices/pci_8086_24ca_scsi_host_0_scsi_device_lun0
8086_2653 R52, T43, T43p, X41, Z60m, Z60t Intel 82801FBM (ICH6-M) /org/freedesktop/Hal/devices/pci_8086_2653_scsi_host_scsi_device_lun0
8086_27c4 R60, X60 Intel 82801GBM (ICH7 Family) /org/freedesktop/Hal/devices/pci_8086_27c4_scsi_host_scsi_device_lun0
8086_27df T60, T60p, Z61m, Z61t, Z61p Intel 82801GBM/GHM (ICH7 Family) /org/freedesktop/Hal/devices/pci_8086_27df_scsi_host_scsi_device_lun0
8086_2850 R61, T61, T61p, X300 Intel 82801H (ICH8 Family) /org/freedesktop/Hal/devices/pci_8086_2850_scsi_host_scsi_device_lun0
8086_2929 R400, R500, T400, T500, W500, W700, X200, X301 Intel 82801I ICH9 Family /org/freedesktop/Hal/devices/pci_8086_2929_scsi_host_0_scsi_device_lun0

lshal output

Please place your lshal output here if you had problems

lshal of my A31:

Thanks! If I understand the output correctly you have one Toshiba Combo DVD-ROM/CD-RW R2002 in one ultrabay connected as slave to the primary IDE controller, and one Toshiba DVD-ROM C2512 in the second ultrabay connected as master to the secondary IDE controller. Can you confirm? I have added it to the table.

I have a Thinkpad T43 and I found out from my lshal output that I had to use parent device: pci_8086_2653_scsi_host_0_scsi_device_lun0 instead of pci_8086_2653_scsi_host_scsi_device_lun0 (notice the added 0). This is the ultrabay, however, the internal disk still use the "original" parent device (the one without the 0). I think this information should be added to the table. Specs: Thinkpad T43 (machine type 2668), Mandriva One 2009.1, haldaemon 0.5.12

Thanks, it is possible that you have AHCI mode disabled in the BIOS for your HDD? --Tonko 11:00, 31 July 2009 (UTC)

Thinkpad T510

The T510 uses the Arrandale chipset, or "Intel Corporation 5 Series/3400 Series Chipset". This seems to work for me:

        <!-- Lenovo ThinkPad T510 -->
        <match key="/org/freedesktop/Hal/devices/computer:system.hardware.version" contains_outof="T510">
          <match key="storage.bus" string_outof="pci;scsi">
            <match key="info.parent" string="/org/freedesktop/Hal/devices/pci_8086_3b2f_scsi_host_0_scsi_device_lun0">
              <merge key="storage.hotpluggable" type="bool">true</merge>

--Jicama 01:58, 7 November 2010 (UTC)

bash script for hotswapping UltraBay

Here is my script for hotswapping ultrabay, is more complex, supports swap partition on drive in ultrabay, check holders (useful, when you are using luks) and more :)

Help needed
Please test on difrent models


    MESSAGE="${0/*\//}: $*"
    if [ "$QUIET" = "0" ]; then
        echo "$MESSAGE"
    if [ "$SYSLOG" != "0" ]; then
        /usr/bin/logger "$MESSAGE"

    case "$1" in
            [ $BEEP != "0" ] && echo 2 > /proc/acpi/ibm/beep
            exit 1
            [ $BEEP != "0" ] && echo 12 > /proc/acpi/ibm/beep
            exit 0

    echo "usage: ${0/*\/} [options]"
    echo "options:"
    echo "    -d <path>  SCSI device (required)"
    echo "    -s         Ignore fail when putting drive to sleep"
    echo "    -q         No messages"
    echo "    -l         Use syslog for messages (-q has no effect)"
    echo "    -b         Use beep for notification (-q has no effect)"
    exit 1

    /bin/readlink -e "/dev/block/$1"    

    /sbin/swapon -s | grep -q -e "^$1\b"

    mount | grep -q -e "^$1\b"

    [ "$(ls "$1/holders")" ]

    DEVICE=$(Block2Device $(cat "$1/dev")) 
    if IsSwap "$DEVICE" || IsMounted "$DEVICE" || HasHolders "$1"; then
	Message "device '$DEVICE' is busy"

    BLOCK=$(cat $SCSI_DEVICE/block/*/dev 2> /dev/null)
    DEVICE=$(Block2Device "$BLOCK")
    if ! /sbin/hdparm -Y "$DEVICE" &> /dev/null; then
        Message "cannot put drive to sleep"
        if [ $FORCE_SLEEP = "0" ]; then

    if ! { echo 1 > $SCSI_DEVICE/delete; } &> /dev/null; then
        Message "cannot delete device"

    grep "$1" /sys/devices/platform/dock.*/type | sed -e s%/type:.*%%

    [ $(cat $(GetDock "$1")/docked) -ne 0 ]

    { echo 0 > $(GetDock "$1")/undock; } &> /dev/null
    if IsDocked "$1"; then
        Message "cannot undock UltraBay"
        Message "UltraBay undocked"


while getopts "d:qlsb" OPTION; do
    case $OPTION in
if [ -d "$SCSI_DEVICE" ] && IsDocked "ata_bay"; then
    for DEV_DIR in $(ls $SCSI_DEVICE/block/*/*/dev $SCSI_DEVICE/block/*/dev | sed -e s/dev$//  2> /dev/null); do
	IsBusy "$DEV_DIR" || Exit "fail"
    SleepDrive || Exit "fail"
    DeleteScsiDevice || Exit "fail"
    sleep 4

if [ ! -d $SCSI_DEVICE ] && $(IsDocked "ata_bay"); then
    if Undock "ata_bay"; then
        Exit "success"
        Exit "fail"

Message "UltraBay is already undocked"
Exit "success"

Supported models: R400 - linux-2.6.29


Interesting, especially the support for swap partitions. but I have two comments, first your calling your script and then having udev call

Then your hard coding the location of the Ultrabay device. This is not guaranteed to be correct, although it will be in most cases. In particular the A and W-series machines. A-series had support for more then one Ultrabay device, while W-series has support for more then one internal HDD in addition to the Ultrabay device, so the Ultrabay location will shift. That is why the Ultrabay Eject script on the main page gets the eject device information from udev.


Hi, thanks, I fix name of script :) Udev calling with option -d, so it remove correct device, if you want remove device manualy, is default device useful. But option may be required...

more comments ;)

You might also have a look at the script on the main page, it has a few extra abilities, such as logging to syslog, beeping and putting up popups on the desktop.

Logging to syslog is simple, just call 'logger' with what you want to log. quite should have no effect on this.

For beeps, similar to what windows does you can echo different values to /proc/acpi/ibm/beep, but it only works if sound is not muted. Unfortunately doing so does seem to generate some annoying messages in syslog.

Lastly you can use notify-send to put up messages on the desktop, but before you can do so you have to do an export DISPLADISPLAY=0:0 /usr/bin/knotify4 --passive-popup : Adresář nebo soubor neexistujeY=:0.0

Syslog and beep

OK, scrip now support syslog and beeping :).

Still missing notify-send ;)

I am also thinking that it would be useful in the case of a busy filesystem to tell the user to run something like fuser -mv /dev/sr0
Or perhaps we should run it ourselves automatically and just tell the user what is the cause of the busy filesystem.
--Tonko 21:21, 8 June 2009 (UTC)

get notify-send working

Hi there,

I've modified your ultrabay_eject script so that the notify-send is working for the user which is logged onto screen :0 for an unified diff see below, here is the whole modified script

  • whole script

# Change the following DEVPATH= to match your system, if you want to run this directly instead of having it called by the udev eject script
# To find the right value, insert the UltraBay optical drive and run:
# udevadm info --query=path --name=/dev/sr0 | perl -pe 's!/block/...$!!'
if [ "$DEVPATH" = "" ]

shopt -s nullglob
export DISPLAY=:0.0 # required for notify-send

DISP0_USER=`lastlog | grep "[[:space:]]:0" | awk '{ print $1 }'` # the [[:space:]] before the :0 is needed to exclude ipv6 adresses
DISP0_USER_HOME=`getent passwd ${DISP0_USER} | cut -d':' -f6`
export XAUTHORITY=${DISP0_USER_HOME}/.Xauthority # also required for notify-send


# Find generic dock interface for UltraBay
dock=$( /bin/grep -l ata_bay /sys/devices/platform/dock.?/type )
if [ -n "$dock" -a -d "$dock" ]; then
        logger ultrabay_eject starting eject of $dock
        logger ultrabay_eject cannot locate bay dock device
        notify-send -u critical -t 100000 "ThinkPad Ultrabay eject failed" "Cannot locate bay dock device"

# Umount the filesystem(s) backed by the given major:minor device(s)
unmount_rdev() { perl - "$@" <<'EOPERL'  # let's do it in Perl
        for $major_minor (@ARGV) {
                $major_minor =~ m/^(\d+):(\d+)$/ or die;
                push(@tgt_rdevs, ($1<<8)|$2);
        # Sort by reverse length of mount point, to unmount sub-directories first
        open MOUNTS,"</proc/mounts" or die "$!";
        @mounts=sort { length($b->[1]) <=> length($a->[1]) } map { [ split ] } <MOUNTS>;
        close MOUNTS;
        foreach $m (@mounts) {
                next unless -b $dev;  $rdev=(stat($dev))[6];
                next unless grep($_==$rdev, @tgt_rdevs);
                system("umount","-v","$dir")==0  or  $bad=1;
                if ($bad == 1) {
                        system("logger","ultrabay_eject","ERROR unmounting",$dev,$dir);
                        system("notify-send -u critical -t 100000 \"Error unmounting $dir\" \"Unmounting of $dir on $dev failed!\"");
                } else {
                        system("notify-send -u normal -t 5000 \"Unmounted $dir\"");
        exit 1 if $bad;

# Get the UltraBay's /dev/foo block device node
ultrabay_dev_node() {
        UDEV_PATH="`readlink -e "$ULTRABAY_SYSDIR/block/"*`" || return 1
        UDEV_NAME="`udevadm info --query=name --path=$UDEV_PATH`" || return 1
        echo /dev/$UDEV_NAME

if [ $( cat $dock/docked ) == 0 ]; then
        logger ultrabay_eject dock reports empty
	if [ -d $ULTRABAY_SYSDIR ]; then
		logger ultrabay_eject dock occupied, shutting down storage device $DEVPATH
		# Unmount filesystems backed by this device
		## This seems to be very inelegant and prone to failure
		unmount_rdev `cat $ULTRABAY_SYSDIR/block/*/dev     \
				  $ULTRABAY_SYSDIR/block/*/*/dev`  \
		|| {
			logger ultrabay_eject umounting failed
			echo 2 > /proc/acpi/ibm/beep  # triple error tone
			notify-send -u critical -t 100000 "ThinkPad Ultrabay eject failed" "Please do not pull the device, doing so could cause file corruption and possibly hang the system. Unmounting of the filesystem on the ThinkPad Ultrabay device failed. Please put the eject leaver back in place, and try to unmount the filesystem manually. If this succeeds you can try the eject again"
			exit 1;
		# Nicely power off the device
		DEVNODE=`ultrabay_dev_node` && hdparm -Y $DEVNODE
		# Let HAL+KDE notice the unmount and let the disk spin down
		sleep 0.5
		# Unregister this SCSI device:
		echo 1 > $ULTRABAY_SYSDIR/delete
		logger ultrabay_eject bay occupied but incorrect device path $DEVPATH
		notify-send -u critical -t 100000 "ThinkPad Ultrabay eject failed" "Bay occupied but incorrect device path"
		echo 2 > /proc/acpi/ibm/beep  # triple error tone
		exit 1

# We need sleep here so someone can disconnect the bay and the drive
sleep 1

# Turn off power to the UltraBay
logger ultrabay_eject undocking $dock
echo 1 > $dock/undock

# Tell the user we're OK
logger ultrabay_eject done
echo 12 > /proc/acpi/ibm/beep
notify-send -u normal -t 10000 "Safe to remove device" "The ThinkPad Ultrabay device can now safely be removed"

  • unified diff
--- ultrabay_eject.orig	2010-01-07 22:51:40.000000000 +0100
+++ ultrabay_eject	2010-01-07 22:54:55.000000000 +0100
@@ -10,6 +10,11 @@
 shopt -s nullglob
 export DISPLAY=:0.0 # required for notify-send
+DISP0_USER=`lastlog | grep "[[:space:]]:0" | awk '{ print $1 }'` # the [[:space:]] before the :0 is needed to exclude ipv6 adresses
+DISP0_USER_HOME=`getent passwd ${DISP0_USER} | cut -d':' -f6`
+export XAUTHORITY=${DISP0_USER_HOME}/.Xauthority # also required for notify-send
 # Find generic dock interface for UltraBay

i hope this is useful to other users as well --Roo 22:19, 7 January 2010 (UTC)

A warning about sysfs docked

A note to script writers/users: The docked sysfs attribute can be unreliable. Be sure the script fails safely if it reports 0 when there are docked devices.

--Kevinoid (talk) 20:45, 14 March 2017 (CET)