This is the first error that shows up in every log of every BD-R disk I've tried to burn since mid-October 2016. The burn starts, reserving track and writing lead in, but then the speed never goes above 1x (it's set to 4x) and quickly goes to 0. This has happened to 30+ disks recently, but only after successfully burning 100's of BD-Rs, and nothing changed - except for Windows updates.
I use an Asus ROG (very fast) laptop with USB 3 and now 2x 5 1/4" external enclosures because I recently got a new drive. (Note that I only use one at a time, however). The issue started on an Asus BW-12B1ST and continues on the recently purchased Asus BW-16D1HT. I know Asus aren't the preferred drives in this forum (even though both of these were manufactured by LG, I think), but I had excellent results with the first one after doing a firmware update a couple of years ago. I've tried changing cables, changing enclosures, and changing drives, but always get the same result:
I 19:08:25 ImgBurn Version 184.108.40.206 started!
I 19:08:25 Microsoft Windows 8 Core x64 Edition (6.2, Build 9200)
I 19:08:25 Total Physical Memory: 25,117,908 KiB - Available: 16,110,788 KiB
I 19:08:25 Initialising SPTI...
I 19:08:25 Searching for SCSI / ATAPI devices...
I 19:08:25 -> Drive 1 - Info: Slimtype DVD A DS8A8SH KAA3 (E:) (SATA)
I 19:10:12 -> Drive 2 - Info: ASUS BW-16D1HT 3.00 (G:) (USB 2.0)
I 19:10:12 Found 1 DVD±RW/RAM and 1 BD-RE XL!
I 19:15:52 Operation Started!
I 19:15:52 Building Image Tree...
I 19:15:52 Calculating Totals...
I 19:15:52 Preparing Image...
I 19:15:52 Contents: 34 Files, 9 Folders
I 19:15:52 Content Type: Data
I 19:15:52 Data Type: MODE1/2048
I 19:15:52 File System(s): UDF (2.50)
I 19:15:52 Volume Label: Morton Salt 20151217-3 (of 4)
I 19:15:52 Size: 24,429,781,585 bytes
I 19:15:52 Sectors: 11,928,623
I 19:15:52 Image Size: 24,430,837,760 bytes
I 19:15:52 Image Sectors: 11,929,120
I 19:15:52 Operation Successfully Completed! - Duration: 00:00:00
I 19:16:00 Operation Started!
I 19:16:00 Building Image Tree...
I 19:16:00 Calculating Totals...
I 19:16:00 Preparing Image...
I 19:16:01 Contents: 34 Files, 9 Folders
I 19:16:01 Content Type: Data
I 19:16:01 Data Type: MODE1/2048
I 19:16:01 File System(s): UDF (2.50)
I 19:16:01 Volume Label: _client_name_ 20151217-3 (of 4)
I 19:16:01 Size: 24,429,781,585 bytes
I 19:16:01 Sectors: 11,928,623
I 19:16:01 Image Size: 24,430,837,760 bytes
I 19:16:01 Image Sectors: 11,929,120
I 19:16:05 Operation Successfully Completed! - Duration: 00:00:04
I 19:16:05 Operation Started!
I 19:16:05 Source File: -==/\/[BUILD IMAGE]\/\==-
I 19:16:05 Source File Sectors: 11,929,120 (MODE1/2048)
I 19:16:05 Source File Size: 24,430,837,760 bytes
I 19:16:05 Source File Volume Identifier: _client_name_ 20151217-3 (of 4)
I 19:16:05 Source File Volume Set Identifier: 499699FD00B605AF
I 19:16:05 Source File Application Identifier: ImgBurn v220.127.116.11
I 19:16:05 Source File Implementation Identifier: ImgBurn
I 19:16:05 Source File File System(s): UDF (2.50)
I 19:16:05 Destination Device: [0:0:0] ASUS BW-16D1HT 3.00 (G:) (USB)
I 19:16:05 Destination Media Type: BD-R (Disc ID: UMEBDR-016-000)
I 19:16:05 Destination Media Supported Write Speeds: 4x, 6x, 8x
I 19:16:05 Destination Media Sectors: 12,219,392
I 19:16:05 Write Mode: BD
I 19:16:05 Write Type: DAO
I 19:16:05 Write Speed: 4x
I 19:16:05 Hardware Defect Management Active: No
I 19:16:05 BD-R Verify Not Required: Yes
I 19:16:05 Link Size: Auto
I 19:16:05 Lock Volume: Yes
I 19:16:05 Test Mode: No
I 19:16:05 OPC: No
I 19:16:05 BURN-Proof: Enabled
I 19:16:08 Write Speed Successfully Set! - Effective: 17,984 KB/s (4x)
I 19:16:23 Filling Buffer... (80 MiB)
I 19:16:24 Writing LeadIn...
I 19:16:25 Writing Session 1 of 1... (1 Track, LBA: 0 - 11929119)
I 19:16:25 Writing Track 1 of 1... (MODE1/2048, LBA: 0 - 11929119)
W 19:16:26 Failed to Write Sectors 7904 - 7935 - Reason: The semaphore timeout period has expired.
W 19:16:26 Retrying (1 of 20)...
W 19:17:24 Retry Failed - Reason: The semaphore timeout period has expired.
W 19:17:24 Retrying (2 of 20)...
At this point the program hangs and I can't get it to abort - not until I physically remove the USB cable. Even if I reboot the machine the drive keeps "writing", although it's not really writing the files...
I've updated and re-installed every possible driver that would have an influence on it. I thought for a while that my machine might not have been recognizing the enclosure as a USB 3 model and that might be causing a bottleneck, but that's not the case with the new enclosure and the16D1HT drive at all, and once I found out where to check it, that wasn't the issue anyway.
Out of other options, I tried burning a disk with the included CyberLink PowerBackup software, and amazingly it worked. I successfully burned a BD-R and also restored it successfully. The files all compared OK.
I'd much prefer using ImgBurn, so that I have direct access to individual files, but it seems something happened suddenly that I can't explain. I've read many of the posts in this forum that talk about chipset driver issues, but that wasn't something that changed. Why would ImgBurn suddenly start having trouble with the drives and CyberLink not?