Drive does not write CDs faster than 16x despite advertised speed of 24x

CD tested was a 48-52x Verbatim branded pthalocyanine made by CMC Magnetics.

I think it depends on what your burning (data, music, etc.) and the data under run buffer... so "bad" CD's don't get created.

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Disc drive does not recognize CDs

Hi,
I have a 17" iMac G4 1.25ghz, 512mb memory, Mac OS 10.5.1, and it does not recognize CDs anymore. I can burn and read DVDs, but I can't read CDs. I don't know if I can burn a CD because it can never recognize the blank media. My system profiler reads:
Sony DVD-RW DW-U10A:
Firmware Revision: A43h
Interconnect: ATAPI
Burn Support: Yes (Apple Shipping Drive)
Cache: 8192 KV
Reads DVD: Yes
CD-Write: -R, -RW
DVD Write: -R, -RW, +R, +RW
Write STrategies: CD-TAO, CD-SAO, CD-Raw, DVD-DAO
Media: Insert Media and refresh to show available burn speeds
It is not only blank CDs it doesn't recognize, it is any CD. It can't read a media CD, it can't read the Microsoft Office CD, or any other CD. When I put in a CD, I hear some grinding noise, then a little whirring, but never a normal sound, like when I put a DVD in. I'm not sure, but I think Leopard messed it up.
Is anyone else having this problem? Please help me. I really want this computer to work - it is my secondary computer, and I don't want to have to install software to it by using my new iMac, or iBook, and put this computer into target disc mode.

The PRAM basically memory on your motherboard, powered by a battery that retain your settings while your computer is turned off or unplugged from the wall. You can find how to reset it here:
http://docs.info.apple.com/article.html?artnum=2238
You should not need to reset the smc, it was an extra step I took because I have done it with my intel iMac (I'm not sure if it does anything for the iMac G4). However, to reset it (if it does anything) you simply unplug your computer from the wall and wait about a minute, then plug it back in.
Hope this helps

Satellite A100-773: DVD/CD drive does not recognise CDs

Hello Friends,
I have Sattelite A100-773.
When I turned it on today it did not recognise any CDs anymore. It however recognises DVDs and also can Burn CDs with Nero.
As soon as I put in a CD it says (in German) something like "Access denied, Function not allowed".
It is a mystery to me what has happened. Until yesterday it was perfect. Now the same CDs (and I have tried 20) wouldn' work anymore.
I have tried system recovery to a previous point in time, but it does not help. In the Hardware manager tells me that everything is allright.
Do you have any idea what it can be?
Thanks a lot
Ognian

Hi
In such case its not easy to say why it happens.
Generally if the drive is not able to read any medias either the hardware malfunctions or the CD or DVD is not compatible and supported.
But let us hope that the hardware is not corrupted.
Try to remove the drive from the device manager and reboot the notebook.
After the reboot the OS should recognise the drive again and should load the driver. Then you could try to test the drive again.
I found also a very great Microsoft document about:
How to troubleshoot issues that occur when you write data to a CD-R or CD-RW optical disc in Windows XP
http://support.microsoft.com/kb/324129
and this:
http://support.microsoft.com/kb/315350/
The other possibility is to use the Recovery CD to reinstall the OS.

DVD Drive does not writes DVD

I have lenovo G580.
I am not able to write DVDs from my Laptop. I have MAT**bleep**A DVD-RAM UJ8C1. It sometimes detects the blank DVD and sometimes doesn't. And even if it detects the blank DVD, as soon as I start the burning process, the drive ejects the disk saying "An error occured while writing disk". The same DVDs work fine on my Samsung Laptop. I even used different brands of DVDs but same problem occured every time.
I couldn't find any driver for the optical drive on the support website.
I have no issue with reading and writing CDs.

Hellow!
I have the Lenovo G580 (Lenovo Solution Center reports #20150). It has the TSST Corp. CDDVDW SN-208DB CD-ROM. It normally writes common CD and DVD through Windows 8.1. However it cannot write dual layer DL DVD for 8.5 Gbytes.

My cd/dvd drive does not accept any cds/dvds

I know this has been posted before, but I have tried many methods posted on this site and others, and either I have done them wrong or they haven't worked.
I have a three year old macbook pro running 10.6.8. I also have Windows 7 Ultimate running on Bootcamp, and my disc drive does not work on that OS either.
The weird thing is that two weeks ago, I installed a videogame using a DVD-R and it was working perfectly. I ejected it when I was done. I am 100% certain there is no disc stuck in the drive, and I have looked in Disc Utility to be sure of that.
I tried resetting the SMC by restarting the computer holding down SHIFT+CONTROL+OPTION and the startup button, and that didn't work. I tried restarting holding down the trackpad button, which would eject any stuck disc, among some other methods.
Maybe someone can point me in the direction of re-installing drivers for the disc drive or something? I really hope this is a software issue because I am in another country for the next year and going to an apple store would be out of my budget and very difficult. Any advice is greatly appreciated.
My last resort (I would rather get my computer fixed) is using a Macbook Air superdrive, however it is incompatible with my macbook pro (for some reason they only made it compatible with the Air, which I don't have). I heard there is a risky way of editing some "code" to get it to run with a macbook. But I must stress again, I would much rather fix the problem at hand than jerry-rig an external drive as a solution.
Thanks so much for your help.
-David
edit: as was mentioned in other posts, when I put a disc in the drive, it feels like something in the upper right hand corner is blocking the entry. The computer is completely unresponsive to the disc. Thanks for reading!

it feels like something in the upper right hand corner is blocking the entry.
Appears your optical drive is "broke" = hardware issue.
For DIY instructions check out the following:
iFixit
YouTube’s “How To” tutorials.
AS are not the only places that fixes Macs.
International AASP’s & Other Services
AASP's Outside of the USA
How to find your nearest Apple Authorized Service Provider (AASP)

My cd/dvd drive does not recognize/load cds

iMac 10.6.8 snow leopard with iTunes 11.0, purchased in 2008.
The cd will be accepted into the drive which will begin to turn/mount the disk followed by a few clicks after which the drive stops, tries again, tries a 3rd time and then ejects the cd. Dvds do load but I have been experiencing "skipping over damaged area" msgs when there is no damage. Resetting the SMC alleviates that problem for dvds but not the cd loading problem. Cds that have been accepted in the past do no load, even brand new cds.
I do play dvds and cds frequently but before I conclude that my drive is failing due to wear and tear, I wanted to know if there's a way to clean the drive, if that's the problem. The drive does not accept a dvd/cd drive cleaning disk.
Any suggestions for further at-home diagnosis/refurbishing before I contact my local authorized repair person or buy a Superdrive to substitute for the malfunctioning drive?

None of the information you have provided answered my question regarding a way to clean/refurbish a drive which will not accept a dvd/cd cleaning disk.
You finally advised me to do what I had already done prior to posting.
Perhaps you have a reading comprehension problem. Although the internal drives are generically referred to as superdrives, I only employed that term in my initial post when referring to purchasing an external drive to potentially be shared with a laptop. So, the confusion is yours.
The link below gives simple yet comprehensive coverage of when, why and how to reset SCM/PRAM, which does not include my CD mounting issue, although it resolved the "skipping over damaged areas" problem I had prior to my original post regarding alternative ways to clean the internal drive.
http://thenextweb.com/lifehacks/2010/12/04/how-when-why-to-reset-the-pram-smc-on -your-mac/
The link below contains a discussion of failing dvd/cd drives for iMacs of the same vintage as mine with the similar mounting issues. I had no success mounting a CD via a virtual XP environment, so it's more likely a hardware issue.
http://forums.macrumors.com/archive/index.php/t-1337712.html
Here's a link discussing pros and cons for buying a USB Superdrive (external Superdrive as I mentioned).
http://www.macworld.co.uk/news/mac/it-worth-buying-apple-usb-superdrive-3491736/

Dvd drive does not read dvd but reads cd only.

my hp compaq 420 core2 duo dvd drive does not read the dvds but only reads the cds. How can i solve this problem, please help me with the correct answer.
This question was solved.
View Solution.

It will likely require replacement of the drive. There is more than one laser in there: one for each function. One can go bad without the other going bad.
608141-001
Above is the part number for the DVD burner drive. I could not find one on eBay. Here is one online:
http://www.mydvddrives.com/replacement-for-hp-compaq-608141-001-sata-cd-dvdrw-dvd-ram-drive-burner-l...
Replacement is easy. Remove a single screw on the bottom and slide the old drive out and replace with the new drive.

While Burning Library - Error and CD drive does not work

While making a backup copy of my library, an error occurred on the second disc. I retried it but nothing happened. I could not continue with the backup or start again.
And since then, my CD drive will not read CDs. It is still connected as I checked the wires and did troubleshooting, the green light turns on and the sound happens like it is reading but it cannot auto-run nor does it acknowledge anything on a CD.
Some code or something must have gotten stuck. I cannot use phone support for some reason nor can I find a place to send an e-mail to. Any help would be appreciated.

Welcome to Apple Discussions!
If your optical drive worked before the repair, then in all likelihood it was not plugged back in when the Mac was reassembled, or if it was, the cable was not properly seated. You should go back to whoever did the repair and have them fix it. It shouldn't take long.
Do you see the drive at all in the System Profiler? If not, it's probably not connected. If you do see it, then it's possible it was damaged during the repair, and whoever did the repair will be responsible for repairing or replacing it.
Good luck!

Tecra M5: DVD drive does not read these mini DVDs

I have canon dvd handycam, and mini dvd works on it. One month back i recorded movie and pictures on mini dvd using handycam and ran mini dvd on my tecra M5 dvd drive, it worked very fine.
Now after 1 month i have 5 mini dvds with movies and pictures which i took on 1 month vacation in diffierent countries, i tried my best but tecra dvd drive does not read these mini dvd, cd drive label appears instead dvd drive when i put mini dvd in it.
All other standard size dvds, cds working fine on it.Its complicated and as well as irritating.
Any suggestions?
Why its messedup?

Seems the lens cannot read this miniDVDs. Possibly the drive lens cannot calibrate and therefore the miniDVDs are nonreadable.
Try the solution from sascha. Maybe youre a lucky man and it works.
If not, try to remove the drive physically from the notebook. Reboot the notebook without the drive. The Windows and BIOS shouldnt recognize the drive.
Then shuts down again, put the drive into the notebook and boot up the unit.
The notebook should recognize the drive and should indicate the firmware again.
Im not sure if this will help you but its attemptable

SD-L622A CD/DVD drive does not read some CD's - Satellite L300-144

Drive TOSHIBA SD-L622A.
The drive does not see boot CD with Windows XP Service Pack 3, some of boot CDs with diagnostic utilities (IMHO 2CD format).
Also these CD does not seen by drive even under Windows XP, Vista.
To My wife has bought Toshiba L300, but another modification. There there is drive Matsu****a (Panasonic).
Problems with the same disks has not arisen.
PS Sorry for a terrible English. My native language is Russian :)

In the first topic I wrote
..+The drive does not see boot CD with Windows XP Service Pack 3+..
I have taken other disk from my friend - the situation has not changed.
Installation Windows XP SP3 has a success only after copying the distribution kit on removable HDD and manual install Windows from command prompt
But I think its abnormal.
I think, the theme can be closed because this question should be addressed to Toshiba's fimware developers
+If you cannot use “some CDs with diagnostic utilities” maybe are the problem those CDs. For me it is not so dramatic issue. if you can use all “commercial” medias everything must be OK.+
May be.....but I have bought two notebooks Toshiba in a day for Me & My wife.
On my wives notebook all the above-stated disks playing normally, but it has another drive by Panasonic (Matsu****a)

Server does not support setting more than 5 shared access policy identifiers on a single container

Hi,
I upload a video file to a new Asset. I then attempt to create a streaming URL by creating an Access Policy and then a Locator, which I use to generate the URL used for streaming.This works great. Until the 6th time you execute
that code against the same Asset. Then you receive this error:
"Server does not support setting more than 5 shared access policy identifiers on a single container."
So, that's fine. I don't need to create a new AccessPolicy everytime, I can reuse the one I've created previously, build a Locator using that same policy. However, even then, I get the error about 5 shared access policies on a single container.
Is this the Lmitation of media service? or am I missing something?
Following is the code I used for this:
if (AssetId != "")
                inputAsset = (from a in _context.Assets
                              where a.Id == AssetId
                              select a).FirstOrDefault();
                policy= (from a in _context.AccessPolicies where a.Name==inputAsset.Name select a).FirstOrDefault();
                var assetFile = inputAsset.AssetFiles.Create(Path.GetFileName(singleFilePath));
                var locator = _context.Locators.CreateLocator(LocatorType.Sas, inputAsset, policy);
                assetFile.Upload(singleFilePath);
                locator.Delete();
                MediaElement media = new MediaElement();
                media.AssetId = inputAsset.Id;
                media.Title = Path.GetFileName(singleFilePath);
                var result = Save(media, singleFilePath);
                return inputAsset;
            else
                inputAsset = _context.Assets.Create(User.Identity.Name, AssetCreationOptions.None);
                 policy = _context.AccessPolicies.Create(
                                    inputAsset.Name,
                                    TimeSpan.FromDays(30),
                                    AccessPermissions.Write | AccessPermissions.List
| AccessPermissions.Read | AccessPermissions.Delete);
                 var assetFile = inputAsset.AssetFiles.Create(Path.GetFileName(singleFilePath));
                 var locator = _context.Locators.CreateLocator(LocatorType.Sas, inputAsset, policy);
                 assetFile.Upload(singleFilePath);
                 locator.Delete();
                 policy.Delete();
                 MediaElement media = new MediaElement();
                 media.AssetId = inputAsset.Id;
                 media.Title = Path.GetFileName(singleFilePath);
                 var result = Save(media, singleFilePath);
                 return inputAsset;

Hi,
I found some information related to
Stored Access Policy , Shared Access Signatures   please check if it helps.
Regards,
Shirisha Paderu.

Package oracle.jdbc.driver does not exist!!

hi there..
am writing a JBDC application and i got the following error:
"package oracle.jdbc.driver does not exist"
what am i supposed to do??
well, am not sure, but i guess the above means that i dont have a JDBC driver for oracle; f i am right, where to get that from and how to install it (in terms of code and maybe enviroment variable)???
one more question: if i want connect to another DB engine than oracle, for example sql server or DB2, do i have to get a different driver??
Appreaciating ur cooperation
MOurad

Actually, if you're using JDK 1.4 or higher you should be using ojdbc14.jar from Oracle. classes12.zip is JDK 1.2 technology.
If you connect to another relational database you should always get the JDBC driver JAR from that vendor. They don't work across different databases. - MOD

JDBC/RMI driver does not support BLOB data type

WLS 5.1 JDBC/RMI driver does not support BLOB data type. It is said in the Weblogic e-doc.
I am using DataSource for database connections, meaning JDBC/RMI driver is actually producing
database connections. I need several columns of BLOB types in my Oracle tables.
Should I use the "JTS" driver instead in order to have the BLOB types supported ?
Thanks for help.
[att1.html]

The error java.rmi.UnmarshalException seems to indicate you are somehow accessing the data-source over RMI, this seems odd. Are you running TopLink on a client and trying to connect to a WebLogic DataSource on the server?
Maybe try connecting directly to the DataSource without going through TopLink and see if you encounter the same issue.
You could also look at the TopLink WebLogic Examples and see how their configuration is different than your own.

JDBC driver does not support XA, hence cannot be a participant in two-phase

Hi
I have a question, we enabled "One Phase Commit", even though we are getting "javax.transaction.xa.XAException: JDBC driver does not support XA, hence cannot be a participant in two-phase commit. To force this participation, set the GlobalTransactionsProtocol attribute to LoggingLastResource (recommended) or EmulateTwoPhaseCommit for the Data Source =nested exception is: javax.transaction.xa.XAException: JDBC driver does not support XA, hence cannot be a participant in two-phase commit. To force this participation, set the GlobalTransactionsProtocol attribute to LoggingLastResource (recommended) or EmulateTwoPhaseCommit for the Data Source". Why is that?
Thanks
Edited by: user7256072 on Apr 10, 2012 12:35 PM

Is there more than one resource participating in the transaction?
If this is the case, and the resources are for example a database and JMS, you can emulate XA
by using the logging last resource setting on a non-XA driver.
An example of the above is presented here: http://middlewaremagic.com/weblogic/?p=7716 (the section my first JavaEE6 application)
Here a stateless EJB is used that has an insertPerson method that uses a datasource and JMS in a transaction.

Hard Drive does not have enough space/error message

Hello: I am new to Mac but have been having trouble with my iMac for a while. I can no longer download my software updates. I have an error message that states "Your hard drive does not have enough space" - 5.7 GB is required.
I only have a 1 GB machine. What am I doing wrong?
When I go to my Macintosh HD icon on the desktop, it says at the bottom of that window that I have 495.9 MB available.
The error message tells me to go to the Startup file to delete items. I go there, but there's only two files. I do have music/photos/but I do not understand what's going on with my computer.
In addition, it turns itself off often, for no apparent reason. Any ideas?
Thanks!
J.Renee

The error refers to space on your hard drive, not memory. Unless you've mis-typed, if you have only 495.9 MBs free on your hard drive then you are definitely out of space. If you continue operating with so little free space you are risking a catastrophic loss of data.
To free up space you will either need to delete unneeded personal files or copy some of your bigger files off to an external hard drive then delete them from your internal drive. Alternatively you can replace the internal drive with a larger drive.
You should maintain no less than 15 GBs or 15% of the hard drive's capacity as free space whichever is greater.
If you meant to type 495.9 GBs then you may have a corrupted disk directory. Try the following:
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger and Leopard.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger, and 4.1 for Leopard) and/or TechTool Pro (4.6.1 for Leopard) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.

Drive does not write CDs faster than 16x despite advertised speed of 24x

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