<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><div>Hello,<br><br>I currently have an issue when burning a DVD. When I try to burn 16x DVD+R the burn process often end without apparent errors, but my drive stay working and locked.<br><br>I found that my DMA switch off during the burn process in this case.<br><br>I use graveman, but I already tried and found the same issue with k3b. Here are my DVD burner specs (I use the last firmware and now a kernel 2.6.20) :<br><br><hr style="width: 100%; height: 2px;"> wodim dev=/dev/hdc -atip -verbose<br>TOC Type: 1 = CD-ROM<br>scsidev: '/dev/hdc'<br>devname: '/dev/hdc'<br>scsibus: -2 target: -2 lun: -2<br>Linux sg driver version: 3.5.27<br>Wodim version: 1.1.2<br>SCSI buffer size: 64512<br>atapi: 1<br>Device type : Removable CD-ROM<br>Version : 0<br>Response
Format: 2<br>Capabilities : <br>Vendor_info : 'HL-DT-ST'<br>Identification : 'DVDRAM GSA-4167B'<br>Revision : 'DL13'<br>Device seems to be: Generic mmc2 DVD-R/DVD-RW.<br>Current: 0x0010 (DVD-ROM)<br>Profile: 0x0012 (DVD-RAM) <br>Profile: 0x0011 (DVD-R sequential recording) <br>Profile: 0x0015 (DVD-R/DL sequential recording) <br>Profile: 0x0014 (DVD-RW sequential recording) <br>Profile: 0x0013 (DVD-RW restricted overwrite) <br>Profile: 0x001A (DVD+RW) <br>Profile: 0x001B (DVD+R) <br>Profile: 0x002B (DVD+R/DL) <br>Profile: 0x0010 (DVD-ROM) (current)<br>Profile: 0x0009 (CD-R) <br>Profile: 0x000A (CD-RW) <br>Profile: 0x0008 (CD-ROM) <br>Profile: 0x0002 (Removable disk) <br>Using generic SCSI-3/mmc DVD-R(W) driver (mmc_mdvd).<br>Driver flags : SWABAUDIO BURNFREE <br>Supported modes: PACKET SAO<br>Drive buf size : 1114112 = 1088 KB<br>Beginning DMA speed test. Set CDR_NODMATEST environment variable if
device<br>communication breaks or freezes immediately after that.<br>Drive DMA Speed: 14497 kB/s 82x CD 10x DVD<br>Current Secsize: 2048<br> ATIP start of lead in: -150 (00:00/00)<br>Disk type: unknown dye (reserved id code)<br>Manuf. index: -1<br>Manufacturer: unknown (not in table)<br><hr style="width: 100%; height: 2px;">$ hdparm -i /dev/hdc<br><br>/dev/hdc:<br><br> Model=HL-DT-ST DVDRAM GSA-4167B, FwRev=DL13, SerialNo=877AF8C427A9<br> Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }<br> RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0<br> BuffType=unknown, BuffSize=0kB, MaxMultSect=0<br> (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0<br> IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}<br> PIO modes: pio0 pio3 pio4 <br> DMA modes: mdma0 mdma1 mdma2 <br> UDMA modes: udma0 udma1 *udma2 <br> AdvancedPM=no<br> Drive conforms to:
Unspecified: ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4 ATA/ATAPI-5<br><br> * signifies the current active mode<br><hr style="width: 100%; height: 2px;">My hard disk drive is using udma5 but is on another IDE controler.<br><br>If I understand correctly the Drive DMA speed, I can't burn a DVD at more than 10x. But using graveman with the Max speed value, it burn it at 16x. Burning 8x DVD works, and burning 16x DVD with few data (< 2GB) sometimes works.<br><br>The dependancies when burning a dvd are (I may be wrong) :<br><br>Graveman -> growisofs -> mkisofs -> wodim -> kernel<br><br>Is this issue really coming from the DVD speed ?<br>Can I fix my DMA speed to burn 16x DVD ?<br>Why is the DMA speed < 10x for DVDs ?<br>Which software is responsible to limit the burning speed ?<br><br><br><br></div></div><br>
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