I ran memtest86 for a couple of passes. No problem was found.
After that I burned 7 BD-R discs with no miscompare warnings.
But on the lastest burn I again got miscompare. Only one on the whole disc.
The log of that session follows.
After the burn I calculated md5 for the file in question on both the burned disc and on the local hard drive.
They were identical.
Should I just ignore miscompares altogether?
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I 19:06:57 ImgBurn Version 2.5.5.0 started!
I 19:06:57 Microsoft Windows 7 Home Premium x64 Edition (6.1, Build 7601 : Service Pack 1)
I 19:06:57 Total Physical Memory: 8,346,704 KB - Available: 6,605,136 KB
I 19:06:57 Initialising SPTI...
I 19:06:57 Searching for SCSI / ATAPI devices...
I 19:06:57 -> Drive 1 - Info: HL-DT-ST DVD+-RW GH50N B101 (F:) (ATAPI)
I 19:06:58 -> Drive 2 - Info: PIONEER BD-RW BDR-205 1.11 (G:) (ATAPI)
I 19:06:58 -> Drive 3 - Info: ELBY CLONEDRIVE 1.4 (H:) (SCSI)
I 19:06:58 -> Drive 4 - Info: ELBY CLONEDRIVE 1.4 (I:) (SCSI)
I 19:06:58 Found 1 DVD±RW/RAM, 2 BD-ROM/HD DVD-ROMs and 1 BD-RE!
I 19:07:01 Operation Started!
I 19:07:01 Building Image Tree...
I 19:07:01 Calculating Totals...
I 19:07:01 Preparing Image...
I 19:07:02 Contents: 12 Files, 14 Folders
I 19:07:02 Content Type: BD Video
I 19:07:02 Data Type: MODE1/2048
I 19:07:02 File System(s): UDF (2.50)
I 19:07:02 Volume Label: [Not Configured]
I 19:07:02 Size: 24,885,816,556 bytes
I 19:07:02 Sectors: 12,151,286
I 19:07:02 Image Size: 24,886,837,248 bytes
I 19:07:02 Image Sectors: 12,151,776
I 19:07:02 Operation Successfully Completed! - Duration: 00:00:00
I 19:07:13 Operation Started!
I 19:07:13 Building Image Tree...
I 19:07:21 Calculating Totals...
I 19:07:21 Preparing Image...
I 19:07:21 Contents: 12 Files, 14 Folders
I 19:07:21 Content Type: BD Video
I 19:07:21 Data Type: MODE1/2048
I 19:07:21 File System(s): UDF (2.50)
I 19:07:21 Volume Label: THE_BLUES_BROTHERS
I 19:07:21 Size: 24,885,816,556 bytes
I 19:07:21 Sectors: 12,151,286
I 19:07:21 Image Size: 24,886,837,248 bytes
I 19:07:21 Image Sectors: 12,151,776
I 19:07:28 Operation Successfully Completed! - Duration: 00:00:14
I 19:07:28 Operation Started!
I 19:07:28 Source File: -==/\/[bUILD IMAGE]\/\==-
I 19:07:28 Source File Sectors: 12,151,776 (MODE1/2048)
I 19:07:28 Source File Size: 24,886,837,248 bytes
I 19:07:28 Source File Volume Identifier: THE_BLUES_BROTHERS
I 19:07:28 Source File Volume Set Identifier: 3F0398E600B96B76
I 19:07:28 Source File Application Identifier: ImgBurn v2.5.5.0
I 19:07:28 Source File Implementation Identifier: ImgBurn
I 19:07:28 Source File File System(s): UDF (2.50)
I 19:07:28 Destination Device: [0:2:0] PIONEER BD-RW BDR-205 1.11 (G:) (ATAPI)
I 19:07:28 Destination Media Type: BD-R (Disc ID: VERBAT-IMe-000) (Speeds: 2x, 4x, 6x, 8x, 10x, 12x)
I 19:07:28 Destination Media Sectors: 12,219,392
I 19:07:28 Write Mode: BD
I 19:07:28 Write Type: DAO
I 19:07:28 Write Speed: 4x
I 19:07:28 BD-R Verify Not Required: Yes
I 19:07:28 Link Size: Auto
I 19:07:28 Lock Volume: Yes
I 19:07:28 Test Mode: No
I 19:07:28 OPC: Yes
I 19:07:28 BURN-Proof: Enabled
I 19:07:28 Write Speed Successfully Set! - Effective: 17,980 KB/s (4x)
I 19:07:28 Advanced Settings - Optimal Writing Speed: No
I 19:07:45 Filling Buffer... (40 MB)
I 19:07:46 Writing LeadIn...
I 19:07:46 Writing Session 1 of 1... (1 Track, LBA: 0 - 12151775)
I 19:07:46 Writing Track 1 of 1... (MODE1/2048, LBA: 0 - 12151775)
I 19:31:09 Synchronising Cache...
I 19:31:10 Closing Track...
I 19:31:11 Finalising Disc...
I 19:31:19 Operation Successfully Completed! - Duration: 00:23:50
I 19:31:19 Average Write Rate: 17,334 KB/s (3.9x) - Maximum Write Rate: 18,058 KB/s (4.0x)
I 19:31:19 Cycling Tray before Verify...
I 19:31:38 Device Ready!
I 19:31:38 Operation Started!
I 19:31:38 Source Device: [0:2:0] PIONEER BD-RW BDR-205 1.11 (G:) (ATAPI)
I 19:31:38 Source Media Type: BD-R (Disc ID: VERBAT-IMe-000) (Speeds: 2x, 4x, 6x, 8x, 10x, 12x)
I 19:31:39 Image File: -==/\/[bUILD IMAGE]\/\==-
I 19:31:39 Image File Sectors: 12,151,776 (MODE1/2048)
I 19:31:39 Image File Size: 24,886,837,248 bytes
I 19:31:39 Image File Volume Identifier: THE_BLUES_BROTHERS
I 19:31:39 Image File Volume Set Identifier: 3F0398E600B96B76
I 19:31:39 Image File Application Identifier: ImgBurn v2.5.5.0
I 19:31:39 Image File Implementation Identifier: ImgBurn
I 19:31:39 Image File File System(s): UDF (2.50)
I 19:31:39 Read Speed (Data/Audio): MAX / MAX
I 19:31:39 Verifying Session 1 of 1... (1 Track, LBA: 0 - 12151775)
I 19:31:39 Verifying Track 1 of 1... (MODE1/2048, LBA: 0 - 12151775)
W 19:44:38 Miscompare at LBA: 8654868, Offset: 748, File: \BDMV\STREAM\00000.m2ts
W 19:44:38 Device: 0x65
W 19:44:38 Image File: 0xE5
W 19:44:38 Total Errors in Sector: 1
I 19:44:38 Verifying Sectors...
I 19:48:11 Operation Successfully Completed! - Duration: 00:16:32
I 19:48:11 Average Verify Rate: 24,499 KB/s (5.4x) - Maximum Verify Rate: 36,020 KB/s (8.0x)
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