The Scan Disc test is available on the Scan Disc tab, where the result is also displayed. It can be run in two versions: as a read test and as a C1/C2 – PI/PO test.
You can use the Read test to test optical drives and/or burned discs. The test checks whether burning was successful and whether all areas can be read.
The C1/C2 – PI/PO test lets you check the quality of the disc with respect to completeness of the sectors. It must be noted that this test is different from the disc quality test, even if the latter is similar to the C1/C2 – PI/PO test. The results from the C1/C2 – PI/PO test are displayed differently in the graph. Instead of the number of errors, the status of the sectors is shown.
The test results of both versions are displayed both in a graph and in detail in the display panel below the graph. In addition, both the test results and data on the test in progress are shown in the Disc info, Surface scan, and Position areas to the right of the graph.
You can define preferences for the test in the Settings area to the right of the graph. The following setting options are available:
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Menu
Speed
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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.
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Option button
Read test
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Enables the Read test.
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Option button
C1/C2 – PI/PO Test
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Enables the C1/C2 – PI/PO test.
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The graph shows all sectors on the disc in one chart, with each sector being plotted with a small square. Each square, i.e. each sector, is displayed in a different color depending on its status. The Surface scan area shows the respective percentage of sectors in the following three categories: Good, Damaged, and Bad in real time while the test is running. The following colors, i.e. status indicators, are available:
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Green
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Readable sectors with no errors.
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Yellow
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Damaged sectors that can still be read using the recorder’s internal error correction feature.
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Red
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Damaged sectors that cannot be corrected and are consequently unreadable.
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The Disc info area shows general information on the disc in the drive. The following display panels are available:
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Type
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Shows the disc type of the disc in the drive.
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ID
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Shows the media code of the disc.
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Date
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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.
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Label
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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.
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| 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.
| 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.
The following display panels are available in the Position area while the test is running:
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Progress
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Shows the progress of the test, i.e. the percentage of the disc already scanned.
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Position
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Continuously indicates the current position of the read head on the disc.
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Speed
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Shows the scanning speed.
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The following information is available in the columns in the display panel:
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File
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Lists the names of the files on the disc in the drive.
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Position
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Shows the respective position of the file on the disc.
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Length
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Shows the length of the individual files.
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Quality
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Specifies the quality of the files. This score is calculated from the number of errors found.
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PIE
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Specifies the number of PI errors found.
Only available for the C1/C2 – P1/PO test.
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PIF
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Specifies the number of PI failures found.
Only available for the C1/C2 – P1/PO test.
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POE
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Specifies the number of PO errors found.
Only available for the C1/C2 – P1/PO test.
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POF
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Specifies the number of PO failures found.
Only available for the C1/C2 – P1/PO test.
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Jitter
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Specifies the jitter values.
Only available for the C1/C2 – P1/PO test. Not all recorders can measure jitter values. This column is omitted if the recorder in question cannot measure the values.
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See also
| PI Errors |
Parity of inner code is part of the structure of a DVD’s data block, and is used for error correction purposes. If a PI in a DVD cannot be read, one speaks of a PI error.
| PO Errors |
The parity of outer code is part of the structure of the data block of a DVD and is used for error correction purposes. If a PO on a DVD cannot be read, one speaks of a PO error.
| PO Breakdowns |
| Jitter |
Jitter refers to an abrupt and undesired change in the signal characteristics. Small gaps occur in the data stream as a result. Audio correction synchronizes the data by overlapping the sectors. This way, the gaps are not audible.
| 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.
| 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.