Hello. I have some questions about dvd burning with cdrecord.
1) The device choice was always a gray area in linux but in older times it was more clear. With 2.4 linux kernel there was ide-scsi support. With early 2.6 there was dev=ATAPI:x,y,z. Nowadays with recent kernels (for example 2.6.28) i can use two namings. The /dev/sr0 and the usual x,y,z naming. I tried to read the archives and came to believe that using dev=x,y,z is better than dev=/dev/sr0. Is that correct ? 2) There are some things about the buffer in the cdrecord output that i don't understand. The command i use is "cdrecord -v -dao file_to_write" and the output is the following. Cdrecord-ProDVD-ProBD-Clone 2.01.01a53 (i686-pc-linux-gnu) Copyright (C) 1995-2008 J�rg Schilling TOC Type: 1 = CD-ROM scsidev: '/dev/dvdrw' devname: '/dev/dvdrw' scsibus: -2 target: -2 lun: -2 Warning: Open by 'devname' is unintentional and not supported. Linux sg driver version: 3.5.27 Using libscg version 'schily-0.9'. Driveropts: 'burnfree' SCSI buffer size: 129024 atapi: 1 Device type : Removable CD-ROM Version : 5 Response Format: 2 Capabilities : Vendor_info : 'TSSTcorp' Identifikation : 'CDDVDW SH-S223Q ' Revision : 'SB02' Device seems to be: Generic mmc2 DVD-R/DVD-RW/DVD-RAM. Current: DVD+R Profile: DVD-R/DL sequential recording Profile: DVD-R/DL layer jump recording Profile: DVD-RW/DL Profile: DVD+R/DL Profile: DVD+R (current) 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 : 1409024 = 1376 KB FIFO size : 33554432 = 32768 KB Track 01: data 4343 MB Total size: 4343 MB = 2223942 sectors Current Secsize: 2048 Blocks total: 2295104 Blocks current: 2295104 Blocks remaining: 71162 Reducing transfer size from 129024 to 98304 bytes. Starting to write CD/DVD/BD at speed 22 in real SAO mode for single session. Last chance to quit, starting real write 0 seconds. Operation starts. Waiting for reader process to fill input buffer ... input buffer ready. Starting new track at sector: 0 Track 01: 4343 of 4343 MB written (fifo 100%) [buf 99%] 22.4x. Track 01: Total bytes read/written: 4554633216/4554633216 (2223942 sectors). Writing time: 245.045s Average write speed 13.4x. Min drive buffer fill was 98% Fixating... Fixating time: 36.096s BURN-Free was 20 times used. cdrecord: fifo had 46333 puts and 46333 gets. cdrecord: fifo was 0 times empty and 6481 times full, min fill was 43%. The following is from another burn. Writing time: 254.371s Average write speed 13.2x. Min drive buffer fill was 98% Fixating... Fixating time: 38.083s BURN-Free was 22 times used. cdrecord: fifo had 47449 puts and 47449 gets. cdrecord: fifo was 0 times empty and 7882 times full, min fill was 95%. 2a) The question i have is why BURN-Free was used when the buffer wasn't empty ? In one time it is 43% and in the other time 95% Isn't burnfree used when the buffer is empty ? 2b) The above results are from burning YUDEN003 16x DVD+R at default speed which is 22x for this media. I notice that until 20x everything works fine. When the speed tries to get 22 it continuously goes 20-21-20-21 etc like it can't keep up with the speed. Is burnfree being activated due to this ? If yes how can i correct it ? Ofcourse i don't care about the 10secs i will gain from the 20 -> 22x change but i just want everything to work correctly in my system. I am fairly sure my hard disk's speed isn't the problem. 2c) It is reducing the transfer size from 129024 to 98304 bytes. I read in the a54 changelog that the transfer size was reverted to 63kb because the kernel can't handle it. Is this the same thing ? Does this reducing to 98304 cause any problems ? cdrecord -scanbus output is the following: Cdrecord-ProDVD-ProBD-Clone 2.01.01a53 (i686-pc-linux-gnu) Copyright (C) 1995-2008 Jörg Schilling Using libscg version 'schily-0.9'. scsibus2: 2,0,0 200) 'TSSTcorp' 'CDDVDW SH-S223Q ' 'SB02' Removable CD-ROM 2,1,0 201) * 2,2,0 202) * 2,3,0 203) * 2,4,0 204) * 2,5,0 205) * 2,6,0 206) * 2,7,0 207) * /etc/default/cdrecord is the following: #ident @(#)cdrecord.dfl 1.4 02/07/07 Copyr 1998 J. Schilling CDR_DEVICE=samsung CDR_FIFOSIZE=16m # drive name device speed fifosize driveropts samsung= /dev/dvdrw -1 32m burnfree My distro is slackware 12.2 and i use the genuine cdrtools suite and not any fork. I will gladly provide any more info you need. I am sorry for the long post and thank you for your time. -- To UNSUBSCRIBE, email to cdwrite-requ...@other.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@other.debian.org