Failed to Read Sectors x - y - Reason: Illegal Mode For This Track, but image read is successful?

This one has me puzzled:

I got a bunch of failed to read sectors messages, but at the final screen it showed me 0 failed, 75 retries and said the image read was successful. :confused:

I 15:48:34 ImgBurn Version 2.5.8.0 started!
I 15:48:34 Microsoft Windows 7 Home Premium Edition (6.1, Build 7601 : Service Pack 1)
I 15:48:34 Total Physical Memory: 3,668,468 KiB  -  Available: 3,039,960 KiB
W 15:48:34 AnyDVD can interfere with ImgBurn's ability to verify accurately, please ensure it's disabled!
I 15:48:34 Initialising SPTI...
I 15:48:34 Searching for SCSI / ATAPI devices...
I 15:48:34 -> Drive 1 - Info: HL-DT-ST BDDVDRW CH10LS20 1.00 (E:) (SATA)
I 15:48:35 -> Drive 2 - Info: HL-DT-ST BDDVDRW GGC-H20L 1.03 (D:) (SATA)
I 15:48:35 -> Drive 3 - Info: ELBY CLONEDRIVE 1.4 (F:) (SCSI)
I 15:48:35 Found 1 BD-ROM/HD DVD-ROM, 1 BD-ROM/DVD±RW and 1 BD-ROM/HD DVD-ROM/DVD±RW!
I 15:49:01 Operation Started!
I 15:49:01 Source Device: [5:0:0] HL-DT-ST BDDVDRW CH10LS20 1.00 (E:) (SATA)
I 15:49:01 Source Media Type: BD-R
I 15:49:01 Source Media Supported Read Speeds: 4x, 4.8x, 6x, 7x, 8x
I 15:49:01 Source Media Supported Write Speeds: 0.2x, 0.3x, 0.6x, 1x, 1.3x, 1.6x, 1.9x
I 15:49:01 Source Media Sectors: 17,319,136
I 15:49:01 Source Media Size: 35,469,590,528 bytes
I 15:49:01 Source Media Volume Identifier: 
I 15:49:01 Source Media Volume Set Identifier: 8CED01C071EFBB24_VOLUME_SET_ID
I 15:49:01 Source Media Application Identifier: APPLICATION_ID
I 15:49:02 Source Media Implementation Identifier: IMPLEMENTATION_ID
I 15:49:02 Source Media File System(s): UDF (2.50)
I 15:49:02 Read Speed (Data/Audio): MAX / MAX
I 15:49:02 Destination File: X:\BD\CAT_RUN_DOM.ISO
I 15:49:02 Destination Free Space: 1,392,930,963,456 Bytes (1,360,284,144.00 KiB) (1,328,402.48 MiB) (1,297.27 GiB)
I 15:49:02 Destination File System: NTFS
I 15:49:02 File Splitting: Auto
I 15:49:03 Read Speed - Effective: 3.3x - 7x, 7x - 3.5x
I 15:49:06 Reading Session 1 of 1... (1 Track, LBA: 0 - 17319135)
I 15:49:06 Reading Track 1 of 1... (MODE1/2048, LBA: 0 - 17319135)
W 15:57:47 Failed to Read Sectors 5171232 - 5171263 - Reason: Illegal Mode For This Track
W 15:57:57 Failed to Read Sector 5171232 - Reason: Illegal Mode For This Track
W 15:57:57 Sector 5171232 maps to File: \BDMV\STREAM\50201.m2ts
W 15:57:57 Retrying (1 of 20)...
W 15:58:05 Retry Failed - Reason: Illegal Mode For This Track
W 15:58:06 Retrying (2 of 20)...
W 15:58:14 Retry Failed - Reason: Illegal Mode For This Track
W 15:58:15 Retrying (3 of 20)...
I 15:58:22 Reading Sectors...
W 15:58:38 Failed to Read Sectors 5171456 - 5171487 - Reason: Illegal Mode For This Track
W 15:59:09 Failed to Read Sectors 5171936 - 5171967 - Reason: Illegal Mode For This Track
W 15:59:33 Failed to Read Sectors 5172160 - 5172191 - Reason: Illegal Mode For This Track
W 15:59:42 Failed to Read Sector 5172160 - Reason: Illegal Mode For This Track
W 15:59:42 Sector 5172160 maps to File: \BDMV\STREAM\50201.m2ts
W 15:59:43 Retrying (1 of 20)...
I 15:59:45 Reading Sectors...
W 16:00:02 Failed to Read Sectors 5172480 - 5172511 - Reason: Illegal Mode For This Track
W 16:00:33 Failed to Read Sectors 5172864 - 5172895 - Reason: Illegal Mode For This Track
W 16:00:41 Failed to Read Sector 5172864 - Reason: Illegal Mode For This Track
W 16:00:41 Sector 5172864 maps to File: \BDMV\STREAM\50201.m2ts
W 16:00:42 Retrying (1 of 20)...
I 16:00:48 Reading Sectors...
W 16:01:04 Failed to Read Sectors 5173056 - 5173087 - Reason: Illegal Mode For This Track
W 16:01:13 Failed to Read Sector 5173056 - Reason: Illegal Mode For This Track
W 16:01:13 Sector 5173056 maps to File: \BDMV\STREAM\50201.m2ts
W 16:01:14 Retrying (1 of 20)...
I 16:01:14 Reading Sectors...
W 16:01:22 Failed to Read Sectors 5173120 - 5173151 - Reason: Illegal Mode For This Track
W 16:01:31 Failed to Read Sector 5173120 - Reason: Illegal Mode For This Track
W 16:01:31 Sector 5173120 maps to File: \BDMV\STREAM\50201.m2ts
W 16:01:32 Retrying (1 of 20)...
W 16:01:40 Retry Failed - Reason: Illegal Mode For This Track
W 16:01:41 Retrying (2 of 20)...
W 16:01:49 Retry Failed - Reason: Illegal Mode For This Track
W 16:01:50 Retrying (3 of 20)...
I 16:01:50 Reading Sectors...
W 16:01:59 Failed to Read Sectors 5173184 - 5173215 - Reason: Illegal Mode For This Track
W 16:02:08 Failed to Read Sector 5173184 - Reason: Illegal Mode For This Track
W 16:02:08 Sector 5173184 maps to File: \BDMV\STREAM\50201.m2ts
W 16:02:09 Retrying (1 of 20)...
W 16:02:17 Retry Failed - Reason: Illegal Mode For This Track
W 16:02:17 Retrying (2 of 20)...
I 16:02:24 Reading Sectors...
W 16:02:32 Failed to Read Sector 5173216 - Reason: Illegal Mode For This Track
W 16:02:32 Sector 5173216 maps to File: \BDMV\STREAM\50201.m2ts
W 16:02:33 Retrying (1 of 20)...
W 16:02:41 Retry Failed - Reason: Illegal Mode For This Track
W 16:02:41 Retrying (2 of 20)...
W 16:02:50 Retry Failed - Reason: Illegal Mode For This Track
W 16:02:50 Retrying (3 of 20)...
I 16:02:51 Reading Sectors...
W 16:03:00 Failed to Read Sectors 5173312 - 5173343 - Reason: Illegal Mode For This Track
W 16:03:11 Failed to Read Sectors 5173376 - 5173407 - Reason: Illegal Mode For This Track
W 16:03:23 Failed to Read Sector 5173408 - Reason: Illegal Mode For This Track
W 16:03:23 Sector 5173408 maps to File: \BDMV\STREAM\50201.m2ts
W 16:03:24 Retrying (1 of 20)...
I 16:03:28 Reading Sectors...
W 16:03:36 Failed to Read Sector 5173440 - Reason: Illegal Mode For This Track
W 16:03:36 Sector 5173440 maps to File: \BDMV\STREAM\50201.m2ts
W 16:03:37 Retrying (1 of 20)...
I 16:03:37 Reading Sectors...
W 16:03:45 Failed to Read Sectors 5173536 - 5173567 - Reason: Illegal Mode For This Track
W 16:03:54 Failed to Read Sector 5173536 - Reason: Illegal Mode For This Track
W 16:03:54 Sector 5173536 maps to File: \BDMV\STREAM\50201.m2ts
W 16:03:55 Retrying (1 of 20)...
I 16:04:01 Reading Sectors...
W 16:04:09 Failed to Read Sector 5173568 - Reason: Illegal Mode For This Track
W 16:04:09 Sector 5173568 maps to File: \BDMV\STREAM\50201.m2ts
W 16:04:10 Retrying (1 of 20)...
W 16:04:18 Retry Failed - Reason: Illegal Mode For This Track
W 16:04:19 Retrying (2 of 20)...
I 16:04:25 Reading Sectors...
W 16:04:33 Failed to Read Sectors 5173632 - 5173663 - Reason: Illegal Mode For This Track
W 16:04:45 Failed to Read Sector 5173664 - Reason: Illegal Mode For This Track
W 16:04:45 Sector 5173664 maps to File: \BDMV\STREAM\50201.m2ts
W 16:04:46 Retrying (1 of 20)...
W 16:04:54 Retry Failed - Reason: Illegal Mode For This Track
W 16:04:55 Retrying (2 of 20)...
W 16:05:03 Retry Failed - Reason: Illegal Mode For This Track
W 16:05:03 Retrying (3 of 20)...
W 16:05:11 Retry Failed - Reason: Illegal Mode For This Track
W 16:05:13 Retrying (4 of 20)...
I 16:05:18 Reading Sectors...
W 16:05:26 Failed to Read Sector 5173696 - Reason: Illegal Mode For This Track
W 16:05:26 Sector 5173696 maps to File: \BDMV\STREAM\50201.m2ts
W 16:05:26 Retrying (1 of 20)...
W 16:05:34 Retry Failed - Reason: Illegal Mode For This Track
W 16:05:35 Retrying (2 of 20)...
W 16:05:43 Retry Failed - Reason: Illegal Mode For This Track
W 16:05:44 Retrying (3 of 20)...
I 16:05:49 Reading Sectors...
W 16:05:57 Failed to Read Sectors 5173760 - 5173791 - Reason: Illegal Mode For This Track
W 16:06:06 Failed to Read Sectors 5173824 - 5173855 - Reason: Illegal Mode For This Track
W 16:06:17 Failed to Read Sectors 5173888 - 5173919 - Reason: Illegal Mode For This Track
W 16:06:26 Failed to Read Sector 5173888 - Reason: Illegal Mode For This Track
W 16:06:26 Sector 5173888 maps to File: \BDMV\STREAM\50201.m2ts
W 16:06:27 Retrying (1 of 20)...
I 16:06:31 Reading Sectors...
W 16:06:41 Failed to Read Sectors 5174016 - 5174047 - Reason: Illegal Mode For This Track
W 16:06:49 Failed to Read Sector 5174016 - Reason: Illegal Mode For This Track
W 16:06:49 Sector 5174016 maps to File: \BDMV\STREAM\50201.m2ts
W 16:06:50 Retrying (1 of 20)...
I 16:06:54 Reading Sectors...
W 16:07:21 Failed to Read Sectors 5174592 - 5174623 - Reason: Illegal Mode For This Track
W 16:07:35 Failed to Read Sector 5174624 - Reason: Illegal Mode For This Track
W 16:07:35 Sector 5174624 maps to File: \BDMV\STREAM\50201.m2ts
W 16:07:36 Retrying (1 of 20)...
I 16:07:38 Reading Sectors...
W 16:07:50 Failed to Read Sectors 5174752 - 5174783 - Reason: Illegal Mode For This Track
W 16:07:59 Failed to Read Sector 5174752 - Reason: Illegal Mode For This Track
W 16:07:59 Sector 5174752 maps to File: \BDMV\STREAM\50201.m2ts
W 16:08:00 Retrying (1 of 20)...
W 16:08:08 Retry Failed - Reason: Illegal Mode For This Track
W 16:08:09 Retrying (2 of 20)...
W 16:08:17 Retry Failed - Reason: Illegal Mode For This Track
W 16:08:18 Retrying (3 of 20)...
W 16:08:26 Retry Failed - Reason: Illegal Mode For This Track
W 16:08:26 Retrying (4 of 20)...
I 16:08:33 Reading Sectors...
W 16:08:46 Failed to Read Sectors 5174848 - 5174879 - Reason: Illegal Mode For This Track
W 16:08:58 Failed to Read Sectors 5174944 - 5174975 - Reason: Illegal Mode For This Track
W 16:09:07 Failed to Read Sector 5174944 - Reason: Illegal Mode For This Track
W 16:09:07 Sector 5174944 maps to File: \BDMV\STREAM\50201.m2ts
W 16:09:07 Retrying (1 of 20)...
I 16:09:12 Reading Sectors...
W 16:09:31 Failed to Read Sectors 5175104 - 5175135 - Reason: Illegal Mode For This Track
W 16:09:40 Failed to Read Sector 5175104 - Reason: Illegal Mode For This Track
W 16:09:40 Sector 5175104 maps to File: \BDMV\STREAM\50201.m2ts
W 16:09:41 Retrying (1 of 20)...
W 16:09:49 Retry Failed - Reason: Illegal Mode For This Track
W 16:09:49 Retrying (2 of 20)...
W 16:09:58 Retry Failed - Reason: Illegal Mode For This Track
W 16:09:58 Retrying (3 of 20)...
W 16:10:06 Retry Failed - Reason: Illegal Mode For This Track
W 16:10:07 Retrying (4 of 20)...
W 16:10:15 Retry Failed - Reason: Illegal Mode For This Track
W 16:10:16 Retrying (5 of 20)...
W 16:10:24 Retry Failed - Reason: Illegal Mode For This Track
W 16:10:25 Retrying (6 of 20)...
W 16:10:33 Retry Failed - Reason: Illegal Mode For This Track
W 16:10:33 Retrying (7 of 20)...
W 16:10:42 Retry Failed - Reason: Illegal Mode For This Track
W 16:10:42 Retrying (8 of 20)...
I 16:10:47 Reading Sectors...
W 16:11:00 Failed to Read Sectors 5175296 - 5175327 - Reason: Illegal Mode For This Track
W 16:11:09 Failed to Read Sector 5175296 - Reason: Illegal Mode For This Track
W 16:11:09 Sector 5175296 maps to File: \BDMV\STREAM\50201.m2ts
W 16:11:10 Retrying (1 of 20)...
W 16:11:18 Retry Failed - Reason: Illegal Mode For This Track
W 16:11:19 Retrying (2 of 20)...
I 16:11:26 Reading Sectors...
W 16:11:34 Failed to Read Sector 5175328 - Reason: Illegal Mode For This Track
W 16:11:34 Sector 5175328 maps to File: \BDMV\STREAM\50201.m2ts
W 16:11:34 Retrying (1 of 20)...
W 16:11:42 Retry Failed - Reason: Illegal Mode For This Track
W 16:11:43 Retrying (2 of 20)...
W 16:11:51 Retry Failed - Reason: Illegal Mode For This Track
W 16:11:52 Retrying (3 of 20)...
W 16:12:00 Retry Failed - Reason: Illegal Mode For This Track
W 16:12:01 Retrying (4 of 20)...
I 16:12:01 Reading Sectors...
W 16:12:09 Failed to Read Sectors 5175392 - 5175423 - Reason: Illegal Mode For This Track
W 16:12:18 Failed to Read Sector 5175392 - Reason: Illegal Mode For This Track
W 16:12:18 Sector 5175392 maps to File: \BDMV\STREAM\50201.m2ts
W 16:12:19 Retrying (1 of 20)...
W 16:12:27 Retry Failed - Reason: Illegal Mode For This Track
W 16:12:28 Retrying (2 of 20)...
I 16:12:28 Reading Sectors...
W 16:12:37 Failed to Read Sector 5175424 - Reason: Illegal Mode For This Track
W 16:12:37 Sector 5175424 maps to File: \BDMV\STREAM\50201.m2ts
W 16:12:37 Retrying (1 of 20)...
I 16:12:44 Reading Sectors...
W 16:12:57 Failed to Read Sectors 5175520 - 5175551 - Reason: Illegal Mode For This Track
W 16:13:14 Failed to Read Sector 5175552 - Reason: Illegal Mode For This Track
W 16:13:14 Sector 5175552 maps to File: \BDMV\STREAM\50201.m2ts
W 16:13:15 Retrying (1 of 20)...
W 16:13:23 Retry Failed - Reason: Illegal Mode For This Track
W 16:13:23 Retrying (2 of 20)...
W 16:13:31 Retry Failed - Reason: Illegal Mode For This Track
W 16:13:33 Retrying (3 of 20)...
W 16:13:41 Retry Failed - Reason: Illegal Mode For This Track
W 16:13:41 Retrying (4 of 20)...
W 16:13:49 Retry Failed - Reason: Illegal Mode For This Track
W 16:13:50 Retrying (5 of 20)...
W 16:13:58 Retry Failed - Reason: Illegal Mode For This Track
W 16:13:59 Retrying (6 of 20)...
W 16:14:07 Retry Failed - Reason: Illegal Mode For This Track
W 16:14:08 Retrying (7 of 20)...
I 16:14:10 Reading Sectors...
W 16:14:26 Failed to Read Sectors 5176224 - 5176255 - Reason: Illegal Mode For This Track
W 16:14:43 Failed to Read Sector 5176256 - Reason: Illegal Mode For This Track
W 16:14:43 Sector 5176256 maps to File: \BDMV\STREAM\50201.m2ts
W 16:14:44 Retrying (1 of 20)...
W 16:14:52 Retry Failed - Reason: Illegal Mode For This Track
W 16:14:53 Retrying (2 of 20)...
I 16:14:58 Reading Sectors...
W 16:15:06 Failed to Read Sector 5176288 - Reason: Illegal Mode For This Track
W 16:15:06 Sector 5176288 maps to File: \BDMV\STREAM\50201.m2ts
W 16:15:07 Retrying (1 of 20)...
I 16:15:07 Reading Sectors...
W 16:15:30 Failed to Read Sectors 5176640 - 5176671 - Reason: Illegal Mode For This Track
W 16:15:47 Failed to Read Sectors 5176736 - 5176767 - Reason: Illegal Mode For This Track
W 16:16:13 Failed to Read Sectors 5177056 - 5177087 - Reason: Illegal Mode For This Track
W 16:16:28 Failed to Read Sectors 5177184 - 5177215 - Reason: Illegal Mode For This Track
W 16:16:37 Failed to Read Sector 5177184 - Reason: Illegal Mode For This Track
W 16:16:37 Sector 5177184 maps to File: \BDMV\STREAM\50201.m2ts
W 16:16:38 Retrying (1 of 20)...
I 16:16:43 Reading Sectors...
W 16:17:00 Failed to Read Sectors 5177440 - 5177471 - Reason: Illegal Mode For This Track
W 16:17:09 Failed to Read Sector 5177440 - Reason: Illegal Mode For This Track
W 16:17:09 Sector 5177440 maps to File: \BDMV\STREAM\50201.m2ts
W 16:17:10 Retrying (1 of 20)...
I 16:17:12 Reading Sectors...
W 16:17:22 Failed to Read Sectors 5177536 - 5177567 - Reason: Illegal Mode For This Track
W 16:17:31 Failed to Read Sector 5177536 - Reason: Illegal Mode For This Track
W 16:17:31 Sector 5177536 maps to File: \BDMV\STREAM\50201.m2ts
W 16:17:32 Retrying (1 of 20)...
I 16:17:38 Reading Sectors...
W 16:17:50 Failed to Read Sectors 5177888 - 5177919 - Reason: Illegal Mode For This Track
W 16:17:59 Failed to Read Sectors 5177952 - 5177983 - Reason: Illegal Mode For This Track
W 16:18:08 Failed to Read Sector 5177952 - Reason: Illegal Mode For This Track
W 16:18:08 Sector 5177952 maps to File: \BDMV\STREAM\50201.m2ts
W 16:18:09 Retrying (1 of 20)...
I 16:18:12 Reading Sectors...
W 16:18:48 Failed to Read Sectors 5179296 - 5179327 - Reason: Illegal Mode For This Track
W 16:19:03 Failed to Read Sector 5179328 - Reason: Illegal Mode For This Track
W 16:19:03 Sector 5179328 maps to File: \BDMV\STREAM\50201.m2ts
W 16:19:04 Retrying (1 of 20)...
I 16:19:09 Reading Sectors...
W 16:19:21 Failed to Read Sectors 5179424 - 5179455 - Reason: Illegal Mode For This Track
W 16:19:43 Failed to Read Sectors 5179552 - 5179583 - Reason: Illegal Mode For This Track
W 16:20:07 Failed to Read Sectors 5179808 - 5179839 - Reason: Illegal Mode For This Track
W 16:20:16 Failed to Read Sector 5179808 - Reason: Illegal Mode For This Track
W 16:20:16 Sector 5179808 maps to File: \BDMV\STREAM\50201.m2ts
W 16:20:16 Retrying (1 of 20)...
W 16:20:25 Retry Failed - Reason: Illegal Mode For This Track
W 16:20:25 Retrying (2 of 20)...
I 16:20:29 Reading Sectors...
W 16:20:44 Failed to Read Sectors 5180000 - 5180031 - Reason: Illegal Mode For This Track
W 16:20:58 Failed to Read Sectors 5180224 - 5180255 - Reason: Illegal Mode For This Track
W 16:21:07 Failed to Read Sector 5180224 - Reason: Illegal Mode For This Track
W 16:21:07 Sector 5180224 maps to File: \BDMV\STREAM\50201.m2ts
W 16:21:07 Retrying (1 of 20)...
W 16:21:15 Retry Failed - Reason: Illegal Mode For This Track
W 16:21:16 Retrying (2 of 20)...
W 16:21:24 Retry Failed - Reason: Illegal Mode For This Track
W 16:21:25 Retrying (3 of 20)...
W 16:21:33 Retry Failed - Reason: Illegal Mode For This Track
W 16:21:34 Retrying (4 of 20)...
W 16:21:42 Retry Failed - Reason: Illegal Mode For This Track
W 16:21:43 Retrying (5 of 20)...
I 16:21:46 Reading Sectors...
W 16:21:54 Failed to Read Sector 5180256 - Reason: Illegal Mode For This Track
W 16:21:54 Sector 5180256 maps to File: \BDMV\STREAM\50201.m2ts
W 16:21:55 Retrying (1 of 20)...
I 16:21:55 Reading Sectors...
W 16:22:09 Failed to Read Sectors 5180704 - 5180735 - Reason: Illegal Mode For This Track
W 16:22:34 Failed to Read Sectors 5181216 - 5181247 - Reason: Illegal Mode For This Track
W 16:22:42 Failed to Read Sector 5181216 - Reason: Illegal Mode For This Track
W 16:22:42 Sector 5181216 maps to File: \BDMV\STREAM\50201.m2ts
W 16:22:43 Retrying (1 of 20)...
I 16:22:48 Reading Sectors...
W 16:24:05 Failed to Read Sectors 5245152 - 5245183 - Reason: Illegal Mode For This Track
W 16:24:25 Failed to Read Sectors 5245248 - 5245279 - Reason: Illegal Mode For This Track
W 16:25:28 Failed to Read Sectors 5248576 - 5248607 - Reason: Illegal Mode For This Track
W 16:25:40 Failed to Read Sectors 5248672 - 5248703 - Reason: Illegal Mode For This Track
W 16:26:08 Failed to Read Sectors 5249152 - 5249183 - Reason: Illegal Mode For This Track
W 16:26:40 Failed to Read Sectors 5249888 - 5249919 - Reason: Illegal Mode For This Track
W 16:55:12 Failed to Read Sectors 12334432 - 12334463 - Reason: Illegal Mode For This Track
W 16:58:59 Failed to Read Sectors 12395584 - 12395615 - Reason: Illegal Mode For This Track
W 16:59:15 Failed to Read Sectors 12396640 - 12396671 - Reason: Illegal Mode For This Track
W 16:59:24 Failed to Read Sectors 12396992 - 12397023 - Reason: Illegal Mode For This Track
W 16:59:30 Failed to Read Sectors 12397344 - 12397375 - Reason: Illegal Mode For This Track
W 16:59:42 Failed to Read Sectors 12398400 - 12398431 - Reason: Illegal Mode For This Track
W 17:00:03 Failed to Read Sectors 12400640 - 12400671 - Reason: Illegal Mode For This Track
W 17:01:20 Failed to Read Sectors 12407456 - 12407487 - Reason: Illegal Mode For This Track
I 17:20:39 Exporting Graph Data...
I 17:20:40 Graph Data File: C:\Users\HTPC\AppData\Roaming\ImgBurn\Graph Data Files\HL-DT-ST_BDDVDRW_CH10LS20_1.00_SUNDAY-OCTOBER-06-2013_3-49_PM_N-A.ibg
I 17:20:40 Export Successfully Completed!
I 17:20:40 Operation Successfully Completed! - Duration: 01:31:32
I 17:20:40 Average Read Rate: 6,307 KiB/s (1.4x) - Maximum Read Rate: 31,071 KiB/s (7.1x)

It reads a block of sectors for speed. If the block read fails, it reads them one at a time and that’s what it ‘retries’ doing too.

If it works after a retry (or even just going block -> single, because technically, that’s a retry in itself), it’ll just continue on as normal and revert to reading a block of them.

It’ll only error out properly (and prompt you) if the 20 (single sector) retries get exhausted and it still hasn’t been able to read the data.

Okay, thanks for the explanation.