Menu
▾
▴
cdrdao-devel
|
From: Paul D. <pau...@ve...> - 2001-06-28 08:42:46
|
Greetings, My apologies if this request for assistance violates list rules. I am trying to make an accurate copy of a data CD. My solution to this error: ... Cannot read CD-TEXT data - maybe not supported by drive. was to use the --read-raw option. As expected, L-EC errors are ignored with this option, but each error seems to stall the the CD drive, causing the CD-ROM to spin down (but, not to a complete stop). As these errors are periodic and frequent, the CD-ROM never gets going, and the process of copying the original to local .bin file is very slow. I received approx. 200MB in over 30min. A "L-EC error" messages succeeds each disk slow down, about one every 2 seconds. (See below for two attempts.) I have experienced this reading from both original media and CD-R burned media. I assume L-EC errors have to do with the CD-R drive and driver, not real format or physical errors on the media. Question: should L-EC errors stall the CD-ROM drive during a read? Is this just happening to me? System Info -- CD-R Drive: Ricoh IDE CD-R/RW RW7080A Rev: 1.3 [pdestefa@mouse cdrdao-1.1.5]$ uname -a Linux mouse 2.4.3-20mdksmp #1 SMP Sun Apr 15 22:32:27 CEST 2001 i686 unknown Thank you for you help, Paul DeStefano [root@mouse cdrdao-1.1.5.bin.x86.linux]# ./cdrdao read-cd --read-raw --device "0,0,0" --driver generic-mmc --datafile /tmp/tu.bin /tmp/ut.toc Cdrdao version 1.1.5 - (C) Andreas Mueller <an...@da...> SCSI interface library - (C) Joerg Schilling L-EC encoding library - (C) Heiko Eissfeldt Paranoia DAE library - (C) Monty Check http://cdrdao.sourceforge.net/drives.html#dt for current driver tables. Using libscg version 'schily-0.5' 0,0,0: CD-R/RW RW7080A Rev: 1.30 Using driver: Generic SCSI-3/MMC - Version 1.2 (options 0x0000) Reading toc and track data... Track Mode Flags Start Length ------------------------------------------------------------ 1 DATA 4 00:00:00( 0) 71:49:35(323210) Leadout DATA 4 71:49:35(323210) Copying data track 1 (MODE1_RAW): start 00:00:00, length 71:49:35 to "/tmp/tu.bin"... WARNING: Found L-EC error at sector 814 - ignored. WARNING: Found L-EC error at sector 818 - ignored. WARNING: Found L-EC error at sector 835 - ignored. WARNING: Found L-EC error at sector 840 - ignored. WARNING: Found L-EC error at sector 845 - ignored. WARNING: Found L-EC error at sector 866 - ignored. WARNING: Found L-EC error at sector 893 - ignored. [root@mouse cdrdao-1.1.5.bin.x86.linux]# ./cdrdao read-cd --read-raw --device "0,0,0" --driver generic-mmc-raw --datafile /tmp/tu.bin /tmp/ut.toc Cdrdao version 1.1.5 - (C) Andreas Mueller <an...@da...> SCSI interface library - (C) Joerg Schilling L-EC encoding library - (C) Heiko Eissfeldt Paranoia DAE library - (C) Monty Check http://cdrdao.sourceforge.net/drives.html#dt for current driver tables. Using libscg version 'schily-0.5' 0,0,0: CD-R/RW RW7080A Rev: 1.30 Using driver: Generic SCSI-3/MMC (raw writing) - Version 2.0 (options 0x0000) Reading toc and track data... Track Mode Flags Start Length ------------------------------------------------------------ 1 DATA 4 00:00:00( 0) 71:49:35(323210) Leadout DATA 4 71:49:35(323210) Copying data track 1 (MODE1_RAW): start 00:00:00, length 71:49:35 to "/tmp/tu.bin"... WARNING: Found L-EC error at sector 814 - ignored. WARNING: Found L-EC error at sector 818 - ignored. WARNING: Found L-EC error at sector 835 - ignored. |
|
From: Andreas M. <an...@da...> - 2001-06-28 18:24:31
|
Paul DeStefano wrote: > > I am trying to make an accurate copy of a data CD. My solution to this > error: > ... > Cannot read CD-TEXT data - maybe not supported by drive. That's OK. Since it is sometime not possible to decide between that the drive does not support CD-TEXT reading and the case that the current CD just does not contain CD-TEXT data you get this inaccurate message. Only some CDs actually have CD-TEXT data so that it is quite common to see this message. > was to use the --read-raw option. As expected, L-EC errors are ignored > with this option, but each error seems to stall the the CD drive, causing > the CD-ROM to spin down (but, not to a complete stop). > > As these errors are periodic and frequent, the CD-ROM never gets going, > and the process of copying the original to local .bin file is very slow. > I received approx. 200MB in over 30min. A "L-EC error" messages succeeds > each disk slow down, about one every 2 seconds. (See below for two > attempts.) I have experienced this reading from both original media and > CD-R burned media. I assume L-EC errors have to do with the CD-R drive > and driver, not real format or physical errors on the media. No, L-EC errors are real media errors. Usually they appear on heavily scratched disks or they've been intentionally formatted on the disk for copy protection purposes. > Question: should L-EC errors stall the CD-ROM drive during a read? Is > this just happening to me? On L-EC errors the drive usually slows down in order to get a correct reading. The drive will itself retry to read sector several times and cdrdao also retires a failing read command 5 times (so far I remember right now). Of course it is useless to retry reading an intentionally broken sector but the drive cannot know why the L-EC check fails. So you probably have to accept the reduced readout time but you could reduce cdrdao's retry factor to speed it up a little bit. Andreas -- Andreas Mueller Tel: +49 89 67808848 Ramsmeierstr. 1 Email: an...@da... 85579 Neubiberg, Germany |
|
From: Giuseppe C. <co...@lu...> - 2001-06-29 08:21:13
|
On Thu, 28 Jun 2001, Paul DeStefano wrote: > Greetings, > > My apologies if this request for assistance violates list rules. > > I am trying to make an accurate copy of a data CD. My solution to this > error: > ... > Cannot read CD-TEXT data - maybe not supported by drive. I see below that you're using mmc and mmc-raw for reading. This should be your last resource: try plextor and plextor-scan instead. BTW raw reading and CD-TEXT do not have anything to share. > was to use the --read-raw option. As expected, L-EC errors are ignored > with this option, but each error seems to stall the the CD drive, causing > the CD-ROM to spin down (but, not to a complete stop). It's the standard behaviour of drives. If you have a plextor drive there's an utility to make the drive not to slow down, called plextor-tool http://www.technik.sth.ac.at/plextor-tool -- Giuseppe "Cowo" Corbelli -->> Riding on Linux-2.4.3-xfs -<! God Knows How Long I Tried To Change Fate !>- Blind Guardian - Mordred's Song |
Thanks for helping keep SourceForge clean.
X