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Write speed miscompare warning question ?


shadowcaster

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This is my first burn of a Verbatim BD-R 4X on a LG GGW-H20L YL05 and I'm a little confused by the speed mismatch warning below. The burn was successful.

 

The drive is rated @ 2x,4x,6x and the media, altough ImgBurn shows 2,4 6 capable, is rated @ 4X.

So, the question is why , when I selct 4X write speed, does the log warn mismatch and says changed to 6X.

Then the final write speed, the last line of the log, shows it is in fact written @ 4X ??

 

Log :

 

I 10:44:10 Source File Application Identifier: ImgBurn v2.5.0.0

I 10:44:10 Source File Implementation Identifier: ImgBurn

I 10:44:10 Source File File System(s): UDF (2.50)

I 10:44:10 Destination Device: [0:1:0] HL-DT-ST BD-RE GGW-H20L YL05 (E:) (ATA)

I 10:44:10 Destination Media Type: BD-R (Disc ID: VERBAT-IMc-00) (Speeds: 2x, 4x, 6x)

I 10:44:10 Destination Media Sectors: 12,219,392

I 10:44:10 Write Mode: BD

I 10:44:10 Write Type: DAO

I 10:44:10 Write Speed: 4x

I 10:44:10 BD-R Verify Not Required: Yes

I 10:44:10 Link Size: Auto

I 10:44:10 Lock Volume: Yes

I 10:44:10 Test Mode: No

I 10:44:10 OPC: No

I 10:44:10 BURN-Proof: Enabled

W 10:44:10 Write Speed Miscompare! - Wanted: 17,982 KB/s (4x), Got: 26,972 KB/s (6x)I 10:44:23 Filling Buffer... (40 MB)

I 10:44:24 Writing LeadIn...

I 10:44:24 Writing Session 1 of 1... (1 Track, LBA: 0 - 12044223)

I 10:44:24 Writing Track 1 of 1... (MODE1/2048, LBA: 0 - 12044223)

I 11:07:01 Synchronising Cache...

I 11:07:04 Closing Track...

I 11:07:05 Finalising Disc...

I 11:07:14 Exporting Graph Data...

I 11:07:14 Graph Data File: C:\Documents and Settings\Administrator\Application Data\ImgBurn\Graph Data Files\HL-DT-ST_BD-RE_GGW-H20L_YL05_WEDNESDAY-NOVEMBER-04-2009_10-44_AM_VERBAT-IMc-00_4x.ibg

I 11:07:14 Export Successfully Completed!

I 11:07:14 Operation Successfully Completed! - Duration: 00:23:03

I 11:07:14 Average Write Rate: 17,764 KB/s (4.0x) - Maximum Write Rate: 18,720 KB/s (4.2x)

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