ImgBurnでのリードエラー
5GBくらいが格納されたDVD-R DL(2層DVD)の読み込みがImgBurnでうまくできなかった。
その時のImgBurnのログ。
I 09:49:34 Read Speed (Data/Audio): MAX / 8x I 09:49:34 Destination File System: NTFS I 09:49:34 File Splitting: Auto I 09:49:38 Reading Session 1 of 1... (1 Track, LBA: 0 - 2630015) I 09:49:38 Reading Track 1 of 1... (MODE1/2048, LBA: 0 - 2630015) I 09:49:38 Reading Layer 0... (LBA: 0 - 2092895) W 09:55:29 Failed to Read Sector 1868464 - Reason: Unrecovered Read Error W 09:55:29 Sector 1868464 maps to File: \foobar.dat W 09:55:29 Retrying (1 of 20)... W 09:55:34 Retry Failed - Reason: Unrecovered Read Error W 09:55:34 Retrying (2 of 20)... W 09:55:39 Retry Failed - Reason: Unrecovered Read Error W 09:55:39 Retrying (3 of 20)... W 09:55:43 Retry Failed - Reason: Unrecovered Read Error W 09:55:44 Retrying (4 of 20)... W 09:55:48 Retry Failed - Reason: Unrecovered Read Error W 09:55:48 Retrying (5 of 20)... W 09:55:53 Retry Failed - Reason: Unrecovered Read Error W 09:55:53 Retrying (6 of 20)... W 09:55:58 Retry Failed - Reason: Unrecovered Read Error W 09:55:58 Retrying (7 of 20)... W 09:56:02 Retry Failed - Reason: Unrecovered Read Error W 09:56:03 Retrying (8 of 20)... W 09:56:07 Retry Failed - Reason: Unrecovered Read Error W 09:56:08 Retrying (9 of 20)... W 09:56:12 Retry Failed - Reason: Unrecovered Read Error W 09:56:12 Retrying (10 of 20)... W 09:56:17 Retry Failed - Reason: Unrecovered Read Error W 09:56:17 Retrying (11 of 20)... W 09:56:22 Retry Failed - Reason: Unrecovered Read Error W 09:56:22 Retrying (12 of 20)... W 09:56:27 Retry Failed - Reason: Unrecovered Read Error W 09:56:27 Retrying (13 of 20)... W 09:56:32 Retry Failed - Reason: Unrecovered Read Error W 09:56:32 Retrying (14 of 20)... W 09:56:36 Retry Failed - Reason: Unrecovered Read Error W 09:56:36 Retrying (15 of 20)... W 09:56:41 Retry Failed - Reason: Unrecovered Read Error W 09:56:41 Retrying (16 of 20)... W 09:56:48 Retry Failed - Reason: Unrecovered Read Error W 09:56:48 Retrying (17 of 20)... W 09:56:53 Retry Failed - Reason: Unrecovered Read Error W 09:56:53 Retrying (18 of 20)... W 09:56:57 Retry Failed - Reason: Unrecovered Read Error W 09:56:57 Retrying (19 of 20)... W 09:57:02 Retry Failed - Reason: Unrecovered Read Error W 09:57:02 Retrying (20 of 20)... W 09:57:06 Retry Failed - Reason: Unrecovered Read Error W 09:58:19 Retrying (21)... W 09:58:23 Retry Failed - Reason: Unrecovered Read Error E 10:00:06 Failed to Read Sector 1868464 - Reason: Unrecovered Read Error E 10:00:06 Sector 1868464 maps to File: \foobar.dat E 10:00:06 Failed to Read Sectors! I 10:00:12 Exporting Graph Data... I 10:00:12 Graph Data File: C:\Users\foobar\AppData\Roaming\ImgBurn\Graph Data Files\HL-DT-ST_DVDRAM_GH22NS40_XXXXXXXXXX.ibg I 10:00:12 Export Successfully Completed! E 10:00:12 Operation Failed! - Duration: 00:10:32 E 10:00:12 Average Read Rate: 5,912 KB/s (4.3x) - Maximum Read Rate: 16,335 KB/s (11.8x)
ログには、Reading Layer 0の次に現れるはずのReading Layer 1がまだ現れてないので、1層目の後半で読み取りエラーが出ており、2層DVDというのはあまり関係ないかもしれない。
こういう読み取りエラーをネットで調べると「ドライブのファームウェアを更新しろ」「ドライブのクリーニングだ！」「違うディスクは読み込めるのか？」「低速で試してみよう」というのが常套句である。
また、ディスクに傷がある時は、ディスク面を歯磨き粉で磨くと読み込めたりする(2回ほど成功した)のだが、今回は目立ったスクラッチは見当たらなかった。
ダメ元で低速(1x)で読み込んでみたところ、うまくISO化できた。
高速でダメで、低速でOKというのは初めての経験でした。
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