Reading and storage of data

Similar Questions

• read and medium n data from text file

  I acquire [a waveform of reading] oscilloscope digital data that is stored in a column in a text file.

  I need to read selectable amount of data at average/parcel them points.

  So basically I want to have a text file with millions of data points, but I want to draw not to say that all 1000. data point. I tried a lot of things I found here on the forum, but as I'm new to LabView, none of them really worked.

  Does anyone have a suggestion.

  Thank you.

  
  

• Read and write data to the content repository.

  Hi all
  We use the content repository to store a document and images on the web server in the Center.
  So we have created/setup a repository of content on the web center.
  Please proivde me some might document page to get an idea of how I can read and write the date
  content repository.
  You are most welocme to provide some idea /suggestion.
  Thank you
  Arun.

  You are using webcenter spaces or you create a custom application webcenter?

  When you create a custom application webcenter, you can make use of the workflow Documents. Jdeveloper resources catalog, you will find a few flows of Documents job that will allow you to add some components to manage documents in a folder structure.
  You must first create a connection to your content from your application server. This can be done in the Application resources, right-click on the connection and in the context menu, select "content repository". Them you must filll in connection to your content server details. Make sure you have selected "Set as primary connection for document service" because otherwise the document taskflows you deposit on your page will not find a connection.

  Once you have added the connection, you will also find a datacontrol to the content repository. In this way, you can use the datacontrol place the taskflow and you can create several custom tables.
  I'm not sure but I think the datacontrol also include surgery to create the document but I'm not sure...

  And if not enough, you can always do use the webservices provided by content server. In Jdeveloper you can easily create a datacontrol from Web services by providing the wsdl file. UCM provides for services so that you can import the wsdl into your application and you can easily create your own forms checkin, tables...

  Here is some information on how to integrate services document:
  http://sqltech.CL/doc/oas11gR1/WebCenter.1111/e10148/jpsdg_doc_lib.htm

  and here are some others:
  http://sqltech.CL/doc/oas11gR1/WebCenter.1111/e10148/jpsdg_content.htm#BABCCFJH
  http://sqltech.CL/doc/oas11gR1/WebCenter.1111/e10149/documents.htm#WCSUG2635
  http://sqltech.CL/doc/oas11gR1/WebCenter.1111/e12405/wcadm_documents.htm#WCADM205

  Published by: Yannick Ongena on Oct 8, 2010 08:23

• Reading and writing data XML of BC4J

  Hello!
  
  I try to reproduce "27.7 reading and writing XML data" chapter of 'Developer Framework of developing applications for forms/4GL developers's Guide. "
  Our intention is to read and write at first only XML.
  However, it seems that we need this chapter a database connection.
  To shorten this assessment - is it possible to adf bc only with xml?
  
  Kind regards
  Torsten

  The solution is described in "27.8 Using programmatic view objects from other Sources of data" in the doc you mentioned. If you use programmatic EO/VO you can do almost what you what to store data. We use xml for some data (but always store in the DB) and read it.

  Timo

• DVD/CD RW do not read audio CDs or data or save a blank CD, but that it's ok to read and write DVDs

  My DVD/CD RW drive will not respond to CDs of any type, void, audio or data.  It whirs for a few seconds and then more nothing.  No AutoPlay (even if she is selected and in the registry as a value of 1), and if I try to click on the drive, the old hourglass stand forever and if I click on new does not, unless I have the disc, it erases then back to normal.

  The drive works fine for DVD reading and writing.  I tried to little nearly every thread relating to problems of CD, and I ran out of hair out! I uninstalled it, unplugged, repluged, rebooted, reinstalled, you name it! PC has updated the driver when I try to update.  I did all the advice regedit I saw and still nothing!  Anyone?  Please?

  Hello

  You have disk problems as the CD/DVD is actually 4 discs in 1 case (CD & DVD burning and)
  Playback of CD and DVD). So it is not unusual for parts from 1 or 2 to not work so that others do
  correctly.

  A CD/DVD cleaner might help.

  CD have a tolerance + - and your can read/write on the edge outside these discs
  tolerances. They may be delivered, but it is generally more economical to replace the disk.

  Several good info here:
  http://Club.myce.com/

  CD/DVD units
  http://www.myce.com/storage/

  Notes on the troubleshooting and repair of readers of compact disks and CD-ROM Drives
  http://www.repairfaq.org/repair/F_cdfaq7.html#CDFAQ_014

  ===========================================

  This troubleshooting could not help if there is alignment and/or wear issues however it
  a shot.

  Step 1: Please do all the same underneath if you did some before as is often total
  a process that solves the problem.

  Try this - Panel - Device Manager - CD/DVD - double click on the device - driver tab.
  Click on update drivers (this will probably do nothing) - RIGHT click ON the drive - uninstall.
  RESTART this will refresh the default driver stack. Even if the reader does not appear to continue
  below.
  
  Then, work your way through these - don't forget the drive might be bad, could be a coward
  cable or slight corrosion on the contacts (usually for a laptop) and other issues.

  Your CD or DVD drive is missing or is not recognized by Windows or other programs
  http://support.microsoft.com/kb/314060 - a Mr Fixit

  Try this fix manually if the Fixit 314060 does not work
  http://www.pchell.com/hardware/cd_drive_error_code_39.shtml

  Your CD or DVD drive is missing or is not recognized by Windows or other programs-
  a Mr Fixit
  http://support.Microsoft.com/kb/982116

  The CD drive or the DVD drive does not work as expected on a computer that you upgraded to
  for Windows Vista
  http://support.Microsoft.com/kb/929461

  When you insert a CD or a DVD, Windows Vista may not recognize the disc
  http://support.Microsoft.com/kb/939052

  Your CD or DVD drive cannot read or write media - A Mr Fixit
  http://support.Microsoft.com/GP/cd_dvd_drive_problems

  CD/DVD drive does not appear in Windows Vista, or you receive this error in Windows
  Vista installation after booting from the DVD (AHCI)
  http://support.Microsoft.com/kb/952951
  Drive CD - R or CD - RW Drive is not recognized as a recordable device
  http://support.Microsoft.com/kb/316529/

  Hardware devices not detected or not working - A Mr Fixit
  http://support.Microsoft.com/GP/hardware_device_problems

  Another possibility is that the cables are loose. Remove ALL power, then make sure that the cables in both
  ends. Remove and replace, do not just tight. For laptops, you can often clean power and
  contacts data with a pencil eraser.

  Some DVD players do not use the Windows default drivers so check with the manufacturer of system and
  manufacturer of device to see if there is a firmware or drivers for your drive if necessary.

  ===============================

  Step 2: You have disc problems as the CD/DVD is actually 4 discs in 1 case (CD & DVD
  Burn and CD and DVD read). So it is not unusual for 1 or 2 operational so that other parts
  do it right.

  Did you follow the Troubleshooting Guide for the reader who still does not work? There are
  the entries in registry that the troubleshooter does not solve and those who "might" be the cause.

  Check with your Maker system and a device for the two possible firmware updates and
  the correct registry entries for your car.

  Here are the keys that I of course are those in question - for the subkeys of the CD/DVD drive
  as there will be other subkeys in these keys. Do not forget to ask specific keys involved as well as
  the parameters.

  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\IDE

  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Hardware Profiles\0001\System\CurrentControlSet\Enum\IDE

  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\ {4D36E965-E325-11CE-BFC1-08002BE10318}

  -----------------------------------------------------------------------

  You can probably find more info here and maybe even the exact registry for your CD/DVD settings
  drive from someone with the same model.

  Forums - a lot of expert real help
  http://Club.myce.com/

  CD/DVD units
  http://www.myce.com/storage/

  Use DevManView to locate the CD/DVD in the registry (be careful and do a prior Restore Point)
  nothing change) - find the DevManView device and then make a right click on it free in RegEdit.

  DevManView - free - an alternative to the standard Windows Device Manager, which displays all the
  devices and their properties in flat table, instead of the tree viewer
  http://www.NirSoft.NET/utils/device_manager_view.html

  I hope this helps.

  Rob Brown - MS MVP - Windows Desktop Experience: Bike - Mark Twain said it right.

• global variable functional to read and write data from and to the parallel loops

  Hello!

  Here is the following situation: I have 3 parallel while loops. I have the fire at the same time. The first loop reads the data from GPIB instruments. Second readers PID powered analog output card (software waveform static timed, cc. Update 3 seconds interval) with DAQmx features. The third argument stores the data in the case of certain conditions to the PDM file.

  I create a functional global variable (FGV) with write and read options containing the measured data (30 double CC in cluster). So when I get a new reading of the GPIB loop, I put the new values in the FGV.

  In parallel loops, I read the FGV when necessary. I know that, I just create a race condition, because when one of the loops reads or writes data in the FGV, no other loops can access, while they hold their race until the loop of winner completed his reading or writing on it.

  In my case, it is not a problem of losing data measured, and also a few short drapes in some loops are okey. (data measured, including the temperature values, used in the loop of PID and the loop to save file, the system also has constants for a significant period, is not a problem if the PID loop reads sometimes on values previous to the FGV in case if he won the race)

  What is a "barbarian way" to make such a code? (later, I want to give a good GUI to my code, so probably I would have to use some sort of event management,...)

  If you recommend something more elegant, please give me some links where I can learn more.

  I started to read and learn to try to expand my little knowledge in LabView, but to me, it seems I can find examples really pro and documents (http://expressionflow.com/2007/10/01/labview-queued-state-machine-architecture/ , http://forums.ni.com/t5/LabVIEW/Community-Nugget-2009-03-13-An-Event-based-messageing-framework/m-p/... ) and really simple, but not in the "middle range". This forum and other sources of NEITHER are really good, but I want to swim in a huge "info-ocean", without guidance...

  I'm after course 1 Core and Core 2, do you know that some free educational material that is based on these? (to say something 'intermediary'...)

  Thank you very much!

  I would use queues instead of a FGV in this particular case.

  A driving force that would provide a signal saying that the data is ready, you can change your FGV readme...  And maybe have an array of clusters to hold values more waiting to be read, etc...  Things get complicated...

  A queue however will do nicely.  You may have an understanding of producer/consumer.  You will need to do maybe not this 3rd loop.  If install you a state machine, which has (among other States): wait for the data (that is where the queue is read), writing to a file, disk PID.

  Your state of inactivity would be the "waiting for data".

  The PID is dependent on the data?  Otherwise it must operate its own, and Yes, you may have a loop for it.  Should run at a different rate from the loop reading data, you may have a different queue or other means for transmitting data to this loop.

  Another tip would be to define the State of PID as the default state and check for new data at regular intervals, thus reducing to 2 loops (producer / consumer).  The new data would be shared on the wires using a shift register.

  There are many tricks.  However, I would not recommend using a basic FGV as your solution.  An Action Engine, would be okay if it includes a mechanism to flag what data has been read (ie index, etc) or once the data has been read, it is deleted from the AE. 
  
  
  There are many ways to implement a solution, you just have to pick the right one that will avoid loosing data.
  

• DAQmx newspaper read and data at different speeds

  Hey guys!

  I use DAQmx to make playback of analog input.  I would like the data be datalogged by TDMS at 1000 Hz.  However, I want to only read data at 10 Hz.  Is there a preferred method to do?  The photo below shows what I have so far.  (Note that this image is a simplification of the routine I use DAQmx)

  

  As you can see, I put the sample clock at 1000 Hz.  This forces TDMS datalogging at 1000 Hz.  Then I have a while loop that runs at 10 Hz with a read operation inside DAQmx.  For the moment, I have to read all THE data buffer at each iteration of the loop.  However, I am only interested in reading 1 sample of each channel for each iteration of the loop.  (I finally take this sample 1/channel at 10 Hz and push it into a plot for the Viewer)

  Is there a way to read only the latest data for each channel and then to clear the buffer, such that I don't get a buffer overrun error when DAQmx see that I have not read all the data?  It seems inefficient to me and read all the data indexing, then only on the first column.  Am I missing something, or is this method very well?

  Thanks for the thoughts!

  I would probably just go out of the wait function, read 100 samples per loop explicitly and index on the last sample for display on your screen (or 100 samples on average).

  Alternatively, setting the following read properties before starting the task should work for most devices (if not, please let us know you are using):

  

  Best regards

• Reading and saving data of two serial ports

  Hi, I googled similar questions in the forum, but I don't have an answer for my problem so I'm posting it here.

  I would read and record data of two balances throgh serial ports. I have a drop down menu in VI, I can choose the availabe ports on my pc. But it is still only one that works. So I only get one data scales them.

  I usually get to choose 6 ports, but only one of them works. So I'm wondering if this is something that has to do with my pc or the VI?

  I've attached a screenshot of my VI.

  Thank you =)

  
  

• Leak memory in real time caused by VISA Read and timed loop of data nodes? Is not supposed.

  In collaboration with LV 8.2.1 in real time to develop applications that monitor or emulate computers on bus RS-422.   The following screenshots have been taken an application that monitors a transmission of 200 Hz.  After a few hours, the PXI station would break a range impressive messages angry... most involving something about memory loss.  After much hair pulling and passing money, my partner has discovered while looking at the available memory on the controller of loss of memory occurred at each loop containing a VISA read and propagation of error using the data nodes (see Leak.jpg of memory).  He concluded that if he went to the propagation of the error to the regular old shift registers, then the available memory was rock-solid.  (has the Leak.jpg of No memory)

  Any ideas of what could be the cause?  Do you see not any problem with the way that we code these kinds of loops?  We always strive to optimize the way in which we use the memory on our urgent requests and VISA readings and DAQmx bed give us the heartache more than ever, we are able to allocate memory for these screws some tips?

  Dan Marlow

  GDLS

  Hi thisisnotadream,

  This problem has been reported, and you seem to be exactly reproduce the conditions required to see this problem. This was reported to R & D (# 134314) for further investigations. There are several possible solutions, of which one is the one you have already found the wiring error directly in the loop. Other situations which give rise to no memory leak are:

  1 if the bytes of the property node port is not there and has read lies in each iteration and time-outs resulting are ignored.

  2. If the structure of the deal is gone and just blindly check the bytes to the port and read each iteration.

  3. If the timed loop is transformed into a while loop.

  Thanks for the comments!

  Kind regards

  Stephen S.

• When I try to burn a music disc player is registered as a DATA reader and does not allow me to copy music files that I can play on an external source

  I have computer aGateway running Vista Home Edition and something happened with WIndows Media Player.   I have the DVD/RW internal drive and external DVD/RW as a player.  I use them mainly to copy music files and it has always worked fine until yesterday.

  When I try to burn a music disc, the player is registered as a DATA reader and does not allow me to copy music files that I can play on an external source (such as the CD or car drive).  Worked fine Saturday and had burned discs Saturday night recognizes the two drives as data drives.

  Is it something that needs to be reset or changed?

  In WMP, please click the button burn up and make sure that the Audio CD is selected. Then try burning the CD again, they now play on a standalone CD player too.

• data of cutting using substring and instring, and storage in a new table

  Hi all
  
  I have an emp_address 2tables, address as below:
  ---------------------------------------------------------------
  create the table emp_address (emp_id varchar2 (10), address varchar2 (100));
  
  Insert into EMP_ADDRESS
  (EMP_ID, ADDRESS)
  Values
  ('101', 'street1 fremont CA 94538');
  Insert into EMP_ADDRESS
  (EMP_ID, ADDRESS)
  Values
  ("102", "Street.2 fremont, CA 94537');
  COMMIT;
  
  
  create the address table (emp_id varchar2 (10), street varchar2 (20), city varchar2 (15), State varchar2 (10), zip varchar2 (10));
  
  -----------------------------------------------------------------------------
  Emp_address data as below:
  
  emp_id address
  
  street1 101 fremont CA 94538
  
  102 fremont, CA 94537 Street.2
  
  ------------------------------------------------------------------------------
  now I read data emp_address and split the data of the address column and record these data in the address table like as below
  
  emp_id Street City State Zip Code
  street1 101 fremont, ca 94538
  102 fremont, ca 94537 Street.2
  
  -------------------------------------------------------------------
  
  
  I'm trying to divide these data using substring and instring. Actually my problem was between the data a few times I have 1tab or 2tabs and sometimes 3tab. If the number of tab spaces is not constant.
  
  So can u help me in this case.
  
  Thanks in adavnce

  position of reference BluShadow

  WITH emp_address AS (SELECT   '101' emp_id,
                                'street1 fremont CA 94538' address
                       FROM     DUAL
                       UNION ALL
                       SELECT   '102',
                                'street2  fremont CA 94537'
                       FROM     DUAL),
      emp_address_list_temp AS
        (SELECT       emp_id,
                      SUBSTR (
                        address,
                        DECODE (LEVEL,
                                1, 1,
                                INSTR (address, ' ', 1, LEVEL - 1) + 1
                               ),
                        DECODE (
                          INSTR (address, ' ', 1, LEVEL),
                          0,
                          LENGTH (address),
                          INSTR (address, ' ', 1, LEVEL)
                          - DECODE (LEVEL,
                                    1, 0,
                                    INSTR (address, ' ', 1, LEVEL - 1)
                                   )
                          - 1
                        )
                      )
                        address,
                      LEVEL rn
         FROM         emp_address
         CONNECT BY   LEVEL <=
                        LENGTH (address) - LENGTH (REPLACE (address, ' ')) + 1
         GROUP BY     emp_id, address, LEVEL),
      emp_address_list AS
        (SELECT   emp_id,
                  address,
                  ROW_NUMBER () OVER (PARTITION BY emp_id ORDER BY rn) rn
         FROM     emp_address_list_temp
         WHERE    TRIM (address) IS NOT NULL)
  SELECT     emp_id,
             (SELECT   address
              FROM     emp_address_list e2
              WHERE    e2.emp_id = e1.emp_id
                   AND rn = 1)
               street,
             (SELECT   address
              FROM     emp_address_list e2
              WHERE    e2.emp_id = e1.emp_id
                   AND rn = 2)
               city,
             (SELECT   address
              FROM     emp_address_list e2
              WHERE    e2.emp_id = e1.emp_id
                   AND rn = 3)
               state,
             (SELECT   address
              FROM     emp_address_list e2
              WHERE    e2.emp_id = e1.emp_id
                   AND rn = 4)
               zip
  FROM       emp_address_list e1
  GROUP BY   emp_id
  

• Reverse metadata Essbase and column of data storage

  Hello
  
  I cancelled Essbase cube and load the account dimension metadata in the database table. For all accounts (Stored, dynamic Calc, part of Neve, etc) data storage column has the value of '. What it means? How can I distinguish accounts Neve share of the dynamic accounts Calc?
  
  Thanks in advance.

  Hello

  Looks like you need to download the latest patch

  Version 10.1.3.4.5
  ==================

  New features
  ------------

  This section should list the new/updated day miles that are provided with this release.
  The following KMs have been updated and are delivered in this version:
  * LKM Hyperion Essbase SQL METADATA

  Resolved issues
  ---------------

  7186129: LKM Hyperion Essbase METADATA SQL does not member of storage of data extract
  property correctly.

  Hope that answers your question correctly.

  See you soon

  John
  http://John-Goodwin.blogspot.com/

• How to read a text file that is longer than 65536 lines and write the data to a spreadsheet Excel and the data to write in a new column, once exhausted 65536 cells in a column?

  I have data to the basic generic text file format that must be converted into Excel spreadsheet format.  The data are much longer than 65536 rows and in my code, I was not able to find a way to see the data in the next column.  Currently, the conversion is done manually and generates an Excel file which has a total of 30-40 complete columns of data.  Any suggestions would be greatly appreciated.

  Thank you

  Darrick

  Here is a possible solution to the (potential) problem. Convert an array of strings and erase the data before writing to the file

  

• What is the date of GA of Foglight for Enterprise Virtualization v. 7.0 and Storage Manager 3.0

  Hello

  I was wondering what should Foglight for Enterprise Virtualization v. 7.0 and Storage Manager 3.0 available for download

  Thank you

  Eli

  Foglight for virtualization 7.0 is now available on Supportlink here. Storage Management 3.0 is available here.

• TSST corp CDDVDW TS-L633B stopped reading and writing

  I have a laptop Acer 4736Z with a TSST corp CDDVDW TS-L633B DVD - RW, so decide simply ceased to read and write DVDs and CDs. When I insert a blank dvd, it will ask me to burn files to it but when I do, it complements the habit and will the useless DVDs. When I insert CD or DVD, the drive does not read it more.

  Please help me on how to solve this problem.
  Thank you

  Hello

  You have disk problems as the CD/DVD is actually 4 discs in 1 case (CD & DVD burning and)
  Playback of CD and DVD). So it is not unusual for parts from 1 or 2 to not work so that others do
  correctly.

  Burning at low speed, or by using the master could help. A CD/DVD cleaner might help.

  Brand of the CD or DVD drive can also be the problem. Low quality (cheap brands) are always problematic.

  CD/DVDs have a tolerance + - and your can read/write on the edge outside these discs
  tolerances. They may be delivered, but it is generally more economical to replace the disk.

  Several good info here:
  http://Club.myce.com/

  CD/DVD units
  http://www.myce.com/storage/

  Notes on the troubleshooting and repair of readers of compact disks and CD-ROM Drives
  http://www.repairfaq.org/repair/F_cdfaq7.html#CDFAQ_014

  ===========================================

  This troubleshooting might not help if there are problems of alignment and wear it
  is worth it.

  Step 1: Please do all the same underneath if you did some before as is often total
  a process that solves the problem.

  Try this - Panel - Device Manager - CD/DVD - double-click the device - driver
  Tab: click on update drivers (this will probably do nothing) - then do a CLICK RIGHT to the road.
  UNINSTALL - REBOOT this will refresh the default driver stack. Even if the disc is not
  shown continue below.
  
  Then, work your way through these - don't forget the drive might be bad, could be a coward
  cable or slight corrosion on the contacts (usually for a laptop) and other issues.

  Your CD or DVD drive is missing or is not recognized by Windows or other programs
  http://support.microsoft.com/kb/314060 - a Mr Fixit

  Try this fix manually if the Fixit 314060 does not work
  http://www.pchell.com/hardware/cd_drive_error_code_39.shtml

  Your CD or DVD drive is missing or is not recognized by Windows or other
  programs - a Mr Fixit
  http://support.Microsoft.com/kb/982116

  The CD drive or the DVD drive does not work as expected on a computer that you
  upgrade to Windows Vista
  http://support.Microsoft.com/kb/929461

  When you insert a CD or a DVD, Windows Vista may not recognize the disc
  http://support.Microsoft.com/kb/939052

  Your CD or DVD drive cannot read or write media - A Mr Fixit
  http://support.Microsoft.com/GP/cd_dvd_drive_problems

  CD/DVD drive does not appear in Windows Vista, or you receive this error during the
  Setup Windows Vista after booting from the DVD (AHCI)
  http://support.Microsoft.com/kb/952951
  Drive CD - R or CD - RW Drive is not recognized as a recordable device
  http://support.Microsoft.com/kb/316529/

  Hardware devices not detected or not working - A Mr Fixit
  http://support.Microsoft.com/GP/hardware_device_problems

  Another possibility is that the cables are loose. Remove ALL power, then check
  in both ends of the cables. Remove and replace, do not just tight. For portable computers, you can
  Often, clean power and contacts data with a pencil eraser.

  Some DVD players do not use the Windows default drivers so check with the system
  Designer and manufacturer of device to see if there is a firmware or drivers for your drive if necessary.

  ===============================

  Step 2: You have disc problems as the CD/DVD is actually 4 discs in 1 case
  (Read burn CD & DVD and CD and DVD). It's not unusual for 1 or 2 parts to not
  function, while others do so correctly.

  Did you follow the Troubleshooting Guide for the reader who still does not work? There are
  some registry entries that do not fix the resolution of problems and those who 'could' be the
  cause.

  Check with your system manufacturer Maker and device for these two possible firmware updates
  and the correct registry entries for your car.

  Here are the keys in my opinion, are those in question - for the subkeys of the CD/DVD drive
  of course there will be other subkeys in these keys. Do not forget to ask specific keys
  in question as well as the parameters.

  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\IDE

  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Hardware Profiles\0001\System\CurrentControlSet\Enum\IDE

  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\ {4D36E965-E325-11CE-BFC1-08002BE10318}

  -----------------------------------------------------------------------

  You can probably find more info here and maybe even right for registry settings
  your CD/DVD from someone with the same drive model.

  Forums - a lot of expert real help
  http://Club.myce.com/

  CD/DVD units
  http://www.myce.com/storage/

  Use DevManView to locate the CD/DVD in the registry (be careful and do a prior Restore Point)
  nothing change) - find the DevManView device and then make a right click on it free in RegEdit.

  DevManView - free - an alternative to the standard Windows Device Manager,
  that displays all devices and their properties in flat table, instead of the tree viewer
  http://www.NirSoft.NET/utils/device_manager_view.html

  I hope this helps.