Problems burning double layer DVD.

POST_AT
Today my news DVDs of 8 GB arrived, so that, I tried to record my music into one of them; Brasero didn’t worked and asked me for a valid disc. Then I tried to install k3b and I disabled all its USEs, all media features were removed. To tell you the truth I love k3b but it usually includes a lot of stuff, however, since I use Gentoo I can get through this. After that I tried to burn the DVD+R and it failed in the middle of the process twice (16GB of storage space lost ), next I recompile k3b with DVD support and I changed the path of the iso image to my documents instead of my /tmp folder (I think it could have made it fail) , and finally I selected no multi-session and chose the Rock Ridge/Joliet (custom) for it. In the end I achieved to burn it, even though, it didn’t read it. So, I plugged in my external DVD player and finally it was able to read the contents of my just recently burned disc. Here part of the error log: K3b Version: 2.0.3 KDE Version: 4.14.24 QT Version: 4.8.6 Kernel: 4.8.12amu-kernel Used versions ———————– mkisofs: 3.2a06 cdrecord: 3.2a06 cdrecord ———————– cdrecord: Insufficient ‘file read’ privileges. You will not be able to open all needed devices. cdrecord: Insufficient ‘file write’ privileges. You will not be able to open all needed devices. cdrecord: Insufficient ‘device’ privileges. You may not be able to send all needed SCSI commands, this my cause various unexplainable problems. cdrecord: Insufficient ‘memlock’ privileges. You may get buffer underruns. cdrecord: Insufficient ‘priocntl’ privileges. You may get buffer underruns. cdrecord: Insufficient ‘network’ privileges. You will not be able to do remote SCSI. scsidev: ‘/dev/sr0’ devname: ‘/dev/sr0’ scsibus: -2 target: -2 lun: -2 Warning: Open by ‘devname’ is unintentional and not supported. Linux sg driver version: 3.5.27 SCSI buffer size: 64512 cdrecord: Warning: Cannot read drive buffer. cdrecord: Warning: The DMA speed test has been skipped. Cdrecord-ProDVD-ProBD-Clone 3.02a06 (x86_64-pc-linux-gnu) Copyright (C) 1995-2016 Joerg Schilling TOC Type: 1 = CD-ROM Using libscg version ‘schily-0.9’. Driveropts: ‘burnfree’ atapi: 1 Device type : Removable CD-ROM Version : 5 Response Format: 2 Capabilities : Vendor_info : ‘HL-DT-ST’ Identifikation : ‘DVDRAM GH24NSB0 ‘ Revision : ‘LM00’ Device seems to be: Generic mmc2 DVD-R/DVD-RW/DVD-RAM. Current: DVD+R/DL Profile: DVD-R/DL sequential recording Profile: DVD-R/DL layer jump recording Profile: DVD+R/DL (current) Profile: DVD+R Profile: DVD+RW Profile: DVD-RW sequential recording Profile: DVD-RW restricted overwrite Profile: DVD-RAM Profile: DVD-R sequential recording Profile: DVD-ROM Profile: CD-RW Profile: CD-R Profile: CD-ROM Profile: Removable Disk Using generic SCSI-3/mmc-3 DVD+R driver (mmc_dvdplusr). Driver flags : NO-CD DVD MMC-3 SWABAUDIO BURNFREE Supported modes: PACKET SAO LAYER_JUMP Drive buf size : 360448 = 352 KB FIFO size : 4194304 = 4096 KB Track 01: data 7869 MB Total size: 7869 MB = 4029292 sectors Current Secsize: 2048 Blocks total: 4173824 Blocks current: 4173824 Blocks remaining: 144532 Reducing transfer size from 64512 to 32768 bytes. Starting to write CD/DVD/BD at speed 4 in real SAO mode for single session. Last chance to quit, starting real write in 3 seconds. 2 seconds. 1 seconds. 0 seconds. Operation starts. Happy New Year!!!