why can't i write a 4.2 GB iso to a 4.7 GB disc?
I 13:03:24 ImgBurn Version 2.5.4.0 started!
I 13:03:24 Microsoft Windows 7 Professional Edition (6.1, Build 7600)
I 13:03:24 Total Physical Memory: 2 087 032 KB - Available: 1 001 252 KB
I 13:03:25 Initialising SPTI...
I 13:03:25 Searching for SCSI / ATAPI devices...
I 13:03:25 -> Drive 1 - Info: HL-DT-ST DVDRAM GSA-T20N WW01 (D:) (ATA)
I 13:03:25 Found 1 DVD±RW/RAM!
I 13:03:45 Operation Started!
I 13:03:45 Source File: C:\Users\jmm\Documents\dvd\dvd.iso
I 13:03:45 Source File Sectors: 2 045 536 (MODE1/2048)
I 13:03:45 Source File Size: 4 189 257 728 bytes
I 13:03:45 Source File Volume Identifier: DVD Video
I 13:03:45 Source File Volume Set Identifier: 3D905B64001F3641
I 13:03:46 Source File Application Identifier: IMGBURN V2.4.4.0 - THE ULTIMATE IMAGE BURNER!
I 13:03:46 Source File Implementation Identifier: ImgBurn
I 13:03:46 Source File File System(s): ISO9660; UDF (1.02)
I 13:03:46 Destination Device: [1:0:0] HL-DT-ST DVDRAM GSA-T20N WW01 (D:) (ATA)
I 13:03:46 Destination Media Type: DVD+R (Disc ID: RITEK-F16-01) (Speeds: 4x; 8x)
I 13:03:46 Destination Media Sectors: 2 295 104
I 13:03:46 Write Mode: DVD
I 13:03:46 Write Type: DAO
I 13:03:46 Write Speed: 1x
I 13:03:46 DVD+R Reserve Track: No
I 13:03:46 Link Size: Auto
I 13:03:46 Lock Volume: Yes
I 13:03:46 Test Mode: No
I 13:03:46 OPC: No
I 13:03:46 BURN-Proof: Enabled
W 13:03:46 Write Speed Miscompare! - MODE SENSE: 5 540 KB/s (4x), GET PERFORMANCE: 11 092 KB/s (8x)
W 13:03:46 Write Speed Miscompare! - MODE SENSE: 5 540 KB/s (4x), GET PERFORMANCE: 11 092 KB/s (8x)
W 13:03:46 Write Speed Miscompare! - MODE SENSE: 5 540 KB/s (4x), GET PERFORMANCE: 11 092 KB/s (8x)
W 13:03:46 Write Speed Miscompare! - MODE SENSE: 5 540 KB/s (4x), GET PERFORMANCE: 11 092 KB/s (8x)
W 13:03:46 Write Speed Miscompare! - Wanted: 1 385 KB/s (1x), Got: 5 540 KB/s (4x) / 11 092 KB/s (8x)
I 13:03:46 Book Type Setting: DVD-ROM
I 13:03:47 Filling Buffer... (40 MB)
I 13:03:49 Writing LeadIn...
W 13:04:17 Failed to Write Sectors 544 - 575 - Reason: Write Error
W 13:04:17 Retrying (1 of 20)...
W 13:04:17 Retry Failed - Reason: Write Error
W 13:04:17 Retrying (2 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (3 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (4 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (5 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (6 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (7 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (8 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (9 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (10 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (11 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (12 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (13 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (14 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (15 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (16 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (17 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (18 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (19 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
W 13:04:17 Retrying (20 of 20)...
W 13:04:17 Retry Failed - Reason: Invalid Address For Write
E 13:04:24 Failed to Write Sectors 544 - 575 - Reason: Write Error
E 13:04:24 Next Writable Address: 0
I 13:04:24 Synchronising Cache...
W 13:04:25 Potential 'WaitImmediateIO' Deferred Error - (0/3) - Write Error
W 13:04:25 Synchronise Cache Failed! - Reason: Write Error
W 13:04:25 Retrying (1 of 3)...
W 13:04:26 Potential 'WaitImmediateIO' Deferred Error - (0/3) - Write Error
W 13:04:26 Retry Failed - Reason: Write Error
W 13:04:26 Retrying (2 of 3)...
W 13:04:27 Potential 'WaitImmediateIO' Deferred Error - (0/3) - Write Error
W 13:04:27 Retry Failed - Reason: Write Error
W 13:04:27 Retrying (3 of 3)...
W 13:04:28 Potential 'WaitImmediateIO' Deferred Error - (0/3) - Write Error
W 13:04:28 Retry Failed - Reason: Write Error
E 13:04:31 Synchronise Cache Failed! - Reason: Write Error
I 13:04:31 Synchronising Cache (Last Attempt!)...
E 13:04:31 Synchronise Cache Failed! - Reason: Unknown (ASC: 0xA0, ASCQ: 0x80)
W 13:04:33 User opted to skip the 'Close Track/Session/Disc' functions.
E 13:04:33 Failed to Write Image!
E 13:04:33 Operation Failed! - Duration: 00:00:47
I 13:04:33 Average Write Rate: 0 KB/s (0.0x) - Maximum Write Rate: 0 KB/s (0.0x)