Disc Quality Tab

The Disc Quality test is often referred to as Scan, and can be run on the Disc Quality tab. You can choose between a quick scan and a complete scan. The quick scan only checks defined points on the disc. All other areas are ignored. As a result, it requires less time than a complete scan but is less accurate. This test is particularly useful for burned discs. It can only be run reliably with a recorder; a simple reader is not sufficient.

Nero DiscSpeed noteicon web 675105803 Disc Quality Tab

Whether the Disc Quality tab is available depends on the recorder that is installed.

The results are displayed in two graphs: the top one shows the results for C1 errors/PI errors (for CD’s and DVD’s respectively), while the bottom one shows the results for C2 errors/PI failures (for CD’s and DVD’s respectively). In the top graph, the vertical scales on the left show the number of C1 errors/PI errors and the vertical scales on the right show the write/read speed. In the bottom graph, the vertical scales on the left show the number of C2 errors/PI failures and the vertical scales on the right show the jitter value. The horizontal scale in both graphs shows the disc capacity, in MB for CD’s and in GB for DVD’s.

If you want to omit a protected area from the bottom graph, enable the Use background to show error limits check box in the options under the Disc Quality navigation entry.

In addition, both test results and data on the test in progress are shown in the Disc info area and in a number of other display panels to the right of the graph. In the PI errors, PI Failures, and Jitter areas under the graph, information on the disc quality is displayed in real-time while the test is run. The number of PO failures is also shown here.

If the Include test data check box has been enabled in the options under the Transfer Rate navigation entry, an additional display panel showing information on the recorder and the firmware used to burn the disc in the drive is shown above the graph.

Firmware

Firmware is software that has been installed on hardware during production (e.g. recorder, USB device, etc.). It is used for communication between the respective hardware and other software, e.g. when a USB device is connected to a PC.

You can define preferences for the test in the Settings area to the right of the graph. In addition, the necessary basic settings in the options under the Disc Quality navigation entry must be met.
The following setting options are available on the tab:

Menu Speed	Defines the speed at which the test is run. The available entries in the drop-down menu vary depending on the disc in the drive.
Button	Refreshes the entries in the drop-down menu of available speeds. If there are several drives connected to your computer, we recommend that you refresh the data once you have chosen the optical drive for the test.
Input field Start	Defines the start value from which the test should run. This value can be manually entered. Select the value 0000MB to start the test from the beginning of the disc.
Input field End	Defines the end value up to which the test should run. This value can be manually entered. Nero DiscSpeed suggests a value for the disc in the drive. For a burned disc, this value may deviate from the maximum capacity, since the data may either not fill up or exceed the maximum capacity.
Check box Quick Scan	If this box is checked, the quick scan will be run as per the settings you defined in the options under the Disc Quality navigation entry. If this box is not checked, the entire disc will be scanned.
Check box Show C1/PIE	If this box is checked, the C1 errors/PI errors will be shown. If this box is not checked, this information will be hidden.
Check box Show C2/PIF	If this box is checked, the C2 errors/PI failures will be shown. If this box is not checked, this information will be hidden.
Check box Show Jitter	If this box is checked, the jitter will be shown. If this box is not checked, this information will be hidden. Not all recorders can measure jitter values. Even if this box is checked, the jitter will not be shown if the recorder in question cannot measure the values.
Check box Show read speed	If this check box is enabled, the read speed is displayed in the top graph. The curve is displayed in red by default. You can change this color according to your requirements in the options under the Disc quality navigation entry.
Check box Show write speed	If this check box is enabled, the write speed is displayed in the top graph. The curve is displayed in white by default. You can change this color according to your requirements in the options under the Disc quality navigation entry. If the Include test data check box has been enabled in the options under the Transfer Rate navigation entry, the write speed will have been recorded on the disc during the burn process and will be available for further tests on the disc. If this box was not checked during burning, the write speed cannot be displayed as the information will not have been saved on the disc.
Button Advanced	Opens the Disc Quality Test: Advanced Options dialog box.

The Disc info area shows general information on the disc in the drive. The following display panels are available:

Type	Shows the disc type of the disc in the drive.
ID	Shows the media code of the disc.
Date	Shows the date when the disc was created/burned. If an image file was burned to the disc, this display panel shows the date on which the image file was created.
Label	Shows the disc label of the disc in the drive. If you do not want to show the disc label, disable the Show disc label box in the options under the Disc Quality navigation entry.

Disc type

Disc type refers to different optical storage media with different specifications. The best known are CD’s and DVD’s that can be written to once or multiple times, and which are manufactured with different storage capacities.

There is more information available in the following display panels:

Quality score	A percentage is calculated based on the results of the test. A quality index of 100% is perfect, i.e. there were no errors.
Progress	Shows the progress of the test, i.e. the percentage of the disc already scanned.
Position	Continuously indicates the current position of the read head on the disc.
Speed	Shows the scanning speed.

The C1 Errors or PI Errors area shows information onC1 or PI errors found. If a CD has been inserted in the optical drive, C1 errors are shown in this area. If a DVD has been inserted in the optical drive, PI errors are displayed in this area.

The following display panels are available:

Average	Shows the average number of C1 or PI errors found.
Maximum	Shows the maximum number of C1 or PI errors.
Total	Shows the total number of C1 or PI errors found.

The C2 Errors or PI Failures area shows information on C2 errors or PI failures found. If a CD has been inserted in the optical drive, C2 errors are shown in this area. If a DVD has been inserted in the optical drive, PI failures are shown in this area.

The following display panels are available:

Average	Shows the average number of C2 errors or PI failures found.
Maximum	Shows the maximum number of C2 errors or PI failures.
Total	Shows the total number of C2 errors or PI failures found.

The Jitter area shows information on the jitter. Not all recorders can measure jitter values. The display panels remain blank if the recorder in question cannot measure the values. The following display panels are available:

Average	Shows the average jitter value.
Maximum	Shows the maximum jitter value.

The number of PO failures is shown in the PO Failures display panel. These are the gravest errors that can be found on a DVD. PO failures are normally an indication of there being unreadable data on the disc.

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Nero DiscSpeed > Disc Quality Tab

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