How "imageburn" works?

I 18:27:47 ImgBurn Version 2.4.3.0 started!
I 18:27:47 Microsoft Windows Vista Home Premium Edition (6.0, Build 6001 : Service Pack 1)
I 18:27:47 Total Physical Memory: 2,086,116 KB - Available: 977,488 KB
I 18:27:47 Initialising SPTI...
I 18:27:47 Searching for SCSI / ATAPI devices...
I 18:27:47 Found 1 DVD±RW/RAM!
I 18:28:14 Operation Started!
I 18:28:14 Source File: C:\Users\md\Documents\Downloads\ubuntu-8.10-desktop-i386.iso
I 18:28:14 Source File Sectors: 357,796 (MODE1/2048)
I 18:28:14 Source File Size: 732,766,208 bytes
I 18:28:14 Source File Volume Identifier: Ubuntu 8.10 i386
I 18:28:14 Source File Application Identifier: GENISOIMAGE ISO 9660/HFS FILESYSTEM CREATOR (C) 1993 E.YOUNGDALE (C) 1997-2006 J.PEARSON/J.SCHILLING (C) 2006-2007 CDRKIT TEAM
I 18:28:14 Source File Implementation Identifier: ††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††
I 18:28:14 Source File File System(s): ISO9660 (Bootable), Joliet
I 18:28:14 Destination Device: [1:0:0] MATSHITA DVD-RAM UJ-850S 1.40 (E:) (ATA)
I 18:28:14 Destination Media Type: DVD-R (Disc ID: TTH02)
I 18:28:14 Destination Media Sectors: 2,297,888
I 18:28:14 Write Mode: DVD
I 18:28:14 Write Type: DAO
I 18:28:14 Write Speed: MAX
I 18:28:14 Link Size: Auto
I 18:28:14 Lock Volume: Yes
I 18:28:14 Test Mode: No
I 18:28:14 OPC: No
I 18:28:14 BURN-Proof: Enabled
I 18:28:17 Filling Buffer... (40 MB)
I 18:28:18 Writing LeadIn...
I 18:28:25 Writing Session 1 of 1... (1 Track, LBA: 0 - 357795)
I 18:28:25 Writing Track 1 of 1... (MODE1/2048, LBA: 0 - 357795)
I 18:30:45 Synchronising Cache...
I 18:32:05 Exporting Graph Data...
I 18:32:05 Graph Data File: C:\Users\md\AppData\Roaming\ImgBurn\Graph Data Files\MATSHITA_DVD-RAM_UJ-850S_1.40_2009年4月28日_18-28_TTH02_MAX.ibg
I 18:32:05 Export Successfully Completed!
I 18:32:05 Operation Successfully Completed! - Duration: 00:03:51
I 18:32:05 Average Write Rate: 5,148 KB/s (3.7x) - Maximum Write Rate: 6,204 KB/s (4.5x)
I 18:32:05 Cycling Tray before Verify...
W 18:32:27 Waiting for device to become ready...
I 18:32:49 Device Ready!
I 18:32:50 Operation Started!
I 18:32:50 Source Device: [1:0:0] MATSHITA DVD-RAM UJ-850S 1.40 (E:) (ATA)
I 18:32:50 Source Media Type: DVD-R (Book Type: DVD-R) (Disc ID: TTH02)
I 18:32:50 Image File: C:\Users\md\Documents\Downloads\ubuntu-8.10-desktop-i386.iso
I 18:32:50 Image File Sectors: 357,796 (MODE1/2048)
I 18:32:50 Image File Size: 732,766,208 bytes
I 18:32:50 Image File Volume Identifier: Ubuntu 8.10 i386
I 18:32:50 Image File Application Identifier: GENISOIMAGE ISO 9660/HFS FILESYSTEM CREATOR (C) 1993 E.YOUNGDALE (C) 1997-2006 J.PEARSON/J.SCHILLING (C) 2006-2007 CDRKIT TEAM
I 18:32:50 Image File Implementation Identifier: ††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††
I 18:32:50 Image File File System(s): ISO9660 (Bootable), Joliet
I 18:32:50 Read Speed (Data/Audio): MAX / MAX
I 18:32:50 Verifying Session 1 of 1... (1 Track, LBA: 0 - 357795)
I 18:32:50 Verifying Track 1 of 1... (MODE1/2048, LBA: 0 - 357795)
I 18:35:06 Exporting Graph Data...
I 18:35:07 Graph Data File: C:\Users\md\AppData\Roaming\ImgBurn\Graph Data Files\MATSHITA_DVD-RAM_UJ-850S_1.40_2009年4月28日_18-28_TTH02_MAX.ibg
I 18:35:07 Export Successfully Completed!
I 18:35:07 Operation Successfully Completed! - Duration: 00:02:15
I 18:35:07 Average Verify Rate: 5,300 KB/s (3.8x) - Maximum Verify Rate: 6,152 KB/s (4.4x)