Thans for answering!
Here´s the log
I 13:42:06 Graph Data File: C:\Users\Julio\AppData\Roaming\ImgBurn\Graph Data Files\Optiarc_DVD_RW_AD-7280S_1.01_MARTES-03-DE-JULIO-DE-2012_01-33_p.m._CMC_MAG._AM3_8x.ibg
I 13:42:06 Export Successfully Completed!
I 13:42:06 Operation Successfully Completed! - Duration: 00:08:16
I 13:42:06 Average Write Rate: 10.003 KB/s (7.2x) - Maximum Write Rate: 11.100 KB/s (8.0x)
I 14:27:36 Operation Started!
I 14:27:36 Source File: F:\bonaere.iso
I 14:27:36 Source File Sectors: 2.285.848 (MODE1/2048)
I 14:27:36 Source File Size: 4.681.416.704 bytes
I 14:27:36 Source File Volume Identifier: DVDVOLUME
I 14:27:36 Source File Volume Set Identifier: 0AAD1CCBDVDSHRNK
I 14:27:36 Source File Implementation Identifier: DVD Shrink
I 14:27:36 Source File File System(s): ISO9660, UDF (1.02)
I 14:27:37 Destination Device: [3:0:0] Optiarc DVD RW AD-7280S 1.01 (G:) (ATA)
I 14:27:37 Destination Media Type: DVD-R (Disc ID: CMC MAG. AM3)
I 14:27:37 Destination Media Supported Write Speeds: 4x, 6x, 8x, 12x, 16x
I 14:27:37 Destination Media Sectors: 2.298.496
I 14:27:37 Write Mode: DVD
I 14:27:37 Write Type: DAO
I 14:27:37 Write Speed: 8x
I 14:27:37 Link Size: Auto
I 14:27:37 Lock Volume: Yes
I 14:27:37 Test Mode: No
I 14:27:37 OPC: No
I 14:27:37 BURN-Proof: Enabled
I 14:27:37 Write Speed Successfully Set! - Effective: 11.080 KB/s (8x)
I 14:27:37 Filling Buffer... (40 MB)
I 14:27:37 Writing LeadIn...
I 14:28:09 Writing Session 1 of 1... (1 Track, LBA: 0 - 2285847)
I 14:28:09 Writing Track 1 of 1... (MODE1/2048, LBA: 0 - 2285847)
W 14:35:01 Waiting for buffers to recover... (LBA: 1973568)
W 14:35:08 Waiting for hard disk activity to reach threshold level...
I 14:35:09 Writing Sectors...
W 14:35:47 Waiting for buffers to recover... (LBA: 2121088)
W 14:35:53 Waiting for hard disk activity to reach threshold level...
I 14:35:54 Writing Sectors...
I 14:36:25 Synchronising Cache...
I 14:36:32 Exporting Graph Data...
I 14:36:32 Graph Data File: C:\Users\Julio\AppData\Roaming\ImgBurn\Graph Data Files\Optiarc_DVD_RW_AD-7280S_1.01_MARTES-03-DE-JULIO-DE-2012_02-27_p.m._CMC_MAG._AM3_8x.ibg
I 14:36:32 Export Successfully Completed!
I 14:36:32 Operation Successfully Completed! - Duration: 00:08:55
I 14:36:32 Average Write Rate: 9.235 KB/s (6.7x) - Maximum Write Rate: 11.100 KB/s (8.0x)
In the background i had Chrome only running... and the disk i was using to write is in a different disk that where the OS is...
It happened only once today, but i am worried since it´s a new hard disk...
Thanks!