bartholomewking Posted January 15, 2016 Share Posted January 15, 2016 (edited) Hello there. I recently bought some Verbatim CD-Rs via ebay. The discs have proven to be of poor quality, perhaps unsurprisingly. However, my query is regarding when I burned a “cue” image file to the discs (i.e. CD Audio) using ImgBurn with the verify option turned on. The discs appeared to have burned successfully and no verify errors were reported. On playing back the discs on a CD player, or through the computer, there were quite significant audible errors. Using Nero DiscSpeed to check these discs revealed a high proportion of bad sectors (marked in amber) on the disc map that program produces, implying the discs were of poor quality. The first two of the discs I tried gave similar results (nero reported > 50% error). I do not have this problem with other media, so feel reasonably confident that this particular batch of CD-Rs is the problem. To reinforce this conclusion I used the ImgBurn “Create image file from disc” option, choosing a WAV file output from one of the discs described above. Auditioning the WAV file reproduced the same audio errors, but the ImgBurn log of this operation did not indicate any errors. My question is this: Is there a reason that ImgBurn does not report verify errors, perhaps because of a quirk of the Audio CD file structure or some other cause. I’ve been using the program for many years now, and always verify with DVDs for both data and video, and read/write errors are reported in the log for these other formats. ImgBurn version: 2.5.8.0, windows XP SP3. LG HL-DT-ST DVD-RAM GSAH55L (CD/DVD-RW drive) Any ideas would be much appreciated. Thanks in anticipation. LOG: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> I 20:39:38 ImgBurn Version 2.5.8.0 started!I 20:39:38 Microsoft Windows XP Professional (5.1, Build 2600 : Service Pack 3)I 20:39:38 Total Physical Memory: 1,964,528 KiB - Available: 1,162,428 KiBI 20:39:38 Initialising SPTI...I 20:39:38 Searching for SCSI / ATAPI devices...I 20:39:40 -> Drive 1 - Info: HL-DT-ST DVD-RAM GSA-H55L 1.05 (D:) (ATA)I 20:39:40 -> Drive 2 - Info: MagicISO Virtual DVD-ROM 1.0A (I:) (Unknown)I 20:39:40 Found 1 DVD-ROM and 1 DVD±RW/RAM!I 20:40:05 Operation Started!I 20:40:05 Source File: C:\DcueData.cueI 20:40:05 Source File Sectors: 185,783 (AUDIO/2352)I 20:40:05 Source File Size: 436,961,616 bytesI 20:40:05 Source File File System(s): NoneI 20:40:05 Destination Device: [1:0:0] HL-DT-ST DVD-RAM GSA-H55L 1.05 (D:) (ATA)I 20:40:05 Destination Media Type: CD-R (Disc ID: 97m17s06f, Moser Baer India)I 20:40:05 Destination Media Supported Write Speeds: 16x, 24x, 40x, 48xI 20:40:05 Destination Media Sectors: 359,847I 20:40:05 Write Mode: CDI 20:40:05 Write Type: SAOI 20:40:05 Write Speed: 14xI 20:40:05 Lock Volume: YesI 20:40:05 Test Mode: NoI 20:40:05 OPC: NoI 20:40:05 BURN-Proof: EnabledW 20:40:05 Write Speed Miscompare! - Wanted: 2,470 KB/s (14x), Got: 2,822 KB/s (16x)W 20:40:05 The drive only supports writing these discs at 16x, 24x, 40x, 48x.I 20:40:06 Filling Buffer... (40 MiB)I 20:40:07 Writing LeadIn...I 20:40:26 Writing Session 1 of 1... (7 Tracks, LBA: 0 - 185782)I 20:40:26 Writing Track 1 of 7... (AUDIO/2352, WAVE, LBA: 0 - 45183)I 20:41:03 Writing Track 2 of 7... (AUDIO/2352, WAVE, LBA: 45184 - 66967)I 20:41:22 Writing Track 3 of 7... (AUDIO/2352, WAVE, LBA: 66968 - 95639)I 20:41:45 Writing Track 4 of 7... (AUDIO/2352, WAVE, LBA: 95640 - 116634)I 20:42:03 Writing Track 5 of 7... (AUDIO/2352, WAVE, LBA: 116635 - 138410)I 20:42:21 Writing Track 6 of 7... (AUDIO/2352, WAVE, LBA: 138411 - 159933)I 20:42:39 Writing Track 7 of 7... (AUDIO/2352, WAVE, LBA: 159934 - 185782)I 20:43:01 Synchronising Cache...I 20:43:08 Exporting Graph Data...I 20:43:08 Graph Data File: C:\Documents and Settings\Administrator\Application Data\ImgBurn\Graph Data Files\HL-DT-ST_DVD-RAM_GSA-H55L_1.05_15-JANUARY-2016_20-40_97m17s06f_14x.ibgI 20:43:08 Export Successfully Completed!I 20:43:08 Operation Successfully Completed! - Duration: 00:03:02I 20:43:08 Average Write Rate: 2,770 KiB/s (14.0x) - Maximum Write Rate: 2,807 KiB/s (14.2x)I 20:43:08 Cycling Tray before Verify...W 20:43:17 Waiting for device to become ready...I 20:43:30 Device Ready!I 20:43:30 Operation Started!I 20:43:30 Source Device: [1:0:0] HL-DT-ST DVD-RAM GSA-H55L 1.05 (D:) (ATA)I 20:43:30 Source Media Type: CD-RI 20:43:30 Source Media Supported Read Speeds: 1x, 4x, 8x, 15x, 20x, 24x, 32x, 40x, 48xI 20:43:30 Source Media Supported Write Speeds: 16x, 24x, 40x, 48xI 20:43:30 Source Media Sectors: 185,783I 20:43:30 Source Media Size: 436,961,616 bytesI 20:43:30 Image File: C:\CDcueData.cueI 20:43:30 Image File Sectors: 185,783 (AUDIO/2352)I 20:43:30 Image File Size: 436,961,616 bytesI 20:43:31 Image File File System(s): NoneI 20:43:31 Read Speed (Data/Audio): MAX / MAXI 20:43:35 Read Speed - Effective: 48xI 20:43:35 Verifying Session 1 of 1... (7 Tracks, LBA: 0 - 185782)I 20:43:35 Verifying Track 1 of 7... (AUDIO/2352, WAVE, LBA: 0 - 45183)I 20:44:58 Verifying Track 2 of 7... (AUDIO/2352, WAVE, LBA: 45184 - 66967)I 20:45:33 Verifying Track 3 of 7... (AUDIO/2352, WAVE, LBA: 66968 - 95639)I 20:46:14 Verifying Track 4 of 7... (AUDIO/2352, WAVE, LBA: 95640 - 116634)I 20:46:42 Verifying Track 5 of 7... (AUDIO/2352, WAVE, LBA: 116635 - 138410)I 20:47:10 Verifying Track 6 of 7... (AUDIO/2352, WAVE, LBA: 138411 - 159933)I 20:47:36 Verifying Track 7 of 7... (AUDIO/2352, WAVE, LBA: 159934 - 185782)I 20:48:07 Exporting Graph Data...I 20:48:07 Graph Data File: C:\Documents and Settings\Administrator\Application Data\ImgBurn\Graph Data Files\HL-DT-ST_DVD-RAM_GSA-H55L_1.05_15-JANUARY-2016_20-40_97m17s06f_14x.ibgI 20:48:07 Export Successfully Completed!I 20:48:07 Operation Successfully Completed! - Duration: 00:04:35I 20:48:07 Average Verify Rate: 1,580 KiB/s (8.0x) - Maximum Verify Rate: 2,037 KiB/s (10.3x) Edited January 15, 2016 by bartholomewking Link to comment Share on other sites More sharing options...
LIGHTNING UK! Posted January 16, 2016 Share Posted January 16, 2016 Verifying just checks every sector is readable by the drive. If the drive reports an error, ImgBurn tells you about it. If it doesn't, it doesn't. So basically, your drive thinks it can read the disc just fine. I do not know what discspeed is doing in order to show orange sections in its map. CDDA discs are unlike any others in that the full 2352 bytes of the sector are used for CDDA data. Normally some is used for error correction and synchronisation etc, making it easier for a drive to know a problem exists when it's asked to return (read) data from a given sector. The verify function normally compares the data the drive returns during a verify (read) operation to what it knows it should be, but that can't happen on CDDA discs because drives write that type of data with an offset and so the data isn't exactly where it should be. Link to comment Share on other sites More sharing options...
bartholomewking Posted January 16, 2016 Author Share Posted January 16, 2016 Thankyou Lightning for your speedy and informative reply. Secondly, thankyou for a superb program ( or should that be the other way around? ) Interestingly, after my posting the above I read more about the ImgBurn options and changed the I/O to use the ASAPI driver. This it seems applies system wide (correct me if I am wrong) and re-ran the SpeedDisc test on one of the duff discs that I had burned before this driver change. DiscSpeed reported no errors in it's scan. Changing back to the SPTI driver via the ImgBurn Settings resulted in the DiscSpeed program showing the errors again. As I've got a few of these discs and they were very inexpensive, I'll run some more tests and post the results here, they may prove informative. As to the meaning of the colours, here is an excerpt from the DiscSpeed manual, it doesn't so far as I can see explain how it makes this judgement: "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: Green: Readable sectors with no errors.Yellow: Damaged sectors that can still be read using the recorder's internal error correction feature.Red: Damaged sectors that cannot be corrected and are consequently unreadable." Link to comment Share on other sites More sharing options...
LIGHTNING UK! Posted January 16, 2016 Share Posted January 16, 2016 No, the I/O options are just for ImgBurn and are not system wide. Link to comment Share on other sites More sharing options...
bartholomewking Posted January 16, 2016 Author Share Posted January 16, 2016 (edited) No, the I/O options are just for ImgBurn and are not system wide. Ok, it did seem to affect the way that DiscSpeed worked is all :-) Like I said, I'll do some tests. Edited January 16, 2016 by bartholomewking Link to comment Share on other sites More sharing options...
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