Re: 100% system CPU usage with cdrecord
On Wed, Jun 30, 2004 at 06:02:52PM -0500, Charles Steinkuehler wrote: Dma *IS* enabled: With Linux 2.4, it's only enabled if the sector size is a multiple of 512. So you can have DMA for writing data CDs, but not audio or VCD, for example. So this could be your problem. I don't see if you mentioned what exactly you are burning? Without DMA, it seems your southbridge pretty much determines how fast your burns can go and there's a point where things really start to tax the CPU. For example, with the old VIA 686b I got about 14x max and a totally bogged down system. At 12x, no problems. Swapped motherboard to a SiS745 based and 16x burns were suddenly no problem. Due to some other mysterious 2.4 Linux problem, I went to 2.6 soon after, DMA works there if you use the ATAPI interface for burning. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
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Re: dvdrtools and dvd+rw-tools problems and suggestions
From [EMAIL PROTECTED] Thu Jul 1 21:57:30 2004 Conclusion: Linux seems to sometimes bastardize SCSI commands it sends to ATAPI drives. Thank you for the suggestion. Was that with 2.4 (ide-scsi) or 2.6 (ATAPI: or ide-scsi)? It was 2.4 and I am very sure that I did not use ATAPI: but ide-scsi. I'm working on capturing the commands used to enable HD_BURN for one of my recent drives, since that seems like a cost effective feature. Obviously having Linux edit the command for me will not make it easier to get a patch working. If you found the commands, please post them ;-) Jörg -- EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin [EMAIL PROTECTED](uni) If you don't have iso-8859-1 [EMAIL PROTECTED](work) chars I am Jorg Schilling URL: http://www.fokus.fraunhofer.de/usr/schilling ftp://ftp.berlios.de/pub/schily -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: 100% system CPU usage with cdrecord
From: Rob Bogus mail account [EMAIL PROTECTED] I *strongly* suggest using ide-scsi with 2.4 kernels. You want to boot with something like hdc=ide-scsi I believe, that what I use for all my working 2.4 systems. The device will probably be 0.0.0, but do check by looking at /proc/scsi/scsi to be sure. I have not had any problems with ide-scsi under 2.6 kernels since 2.6.2 or so, but the ATAPI interface is much easier on the CPU for audio burn. The ATAPI: interface has no DMA at all The ATA: fixes a DMA bug that should be ficed the same way for ide-scsi. It is just annoing to see that the Linux kernel folks first copied the code from ide-scsi just to create this unneeded new interface and later onlu fixed the bug in the copy but not in the original Jörg -- EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin [EMAIL PROTECTED](uni) If you don't have iso-8859-1 [EMAIL PROTECTED](work) chars I am Jorg Schilling URL: http://www.fokus.fraunhofer.de/usr/schilling ftp://ftp.berlios.de/pub/schily -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: 100% system CPU usage with cdrecord
From: Ambrose Li [EMAIL PROTECTED] But note that if you use ide-scsi on 2.4, don't try to create HFS/ISO9660 hybrid disks. Otherwise your computer will lock up when you mount your disk to verify it. ? I would not believe this unless you give an explanation. Jörg -- EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin [EMAIL PROTECTED](uni) If you don't have iso-8859-1 [EMAIL PROTECTED](work) chars I am Jorg Schilling URL: http://www.fokus.fraunhofer.de/usr/schilling ftp://ftp.berlios.de/pub/schily -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: 100% system CPU usage with cdrecord
From: Anssi Saari [EMAIL PROTECTED] On Wed, Jun 30, 2004 at 06:02:52PM -0500, Charles Steinkuehler wrote: Dma *IS* enabled: With Linux 2.4, it's only enabled if the sector size is a multiple of 512. So you can have DMA for writing data CDs, but not audio or VCD, for example. So this could be your problem. I don't see if you mentioned what exactly you are burning? WORSE: ATAPI: never gives DMA. Jörg -- EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin [EMAIL PROTECTED](uni) If you don't have iso-8859-1 [EMAIL PROTECTED](work) chars I am Jorg Schilling URL: http://www.fokus.fraunhofer.de/usr/schilling ftp://ftp.berlios.de/pub/schily -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: 100% system CPU usage with cdrecord
Charles Steinkuehler [EMAIL PROTECTED] wrote: [...] Just so I'm clear, for best results... If using a 2.6 kernel, I should use the ATAPI interface, ie: cdrecord dev=ATAPI:0,0,0 ... with no special kernel options at boot No. Quoting README.ATAPI: - Linux-2.4.xx includes a CDROM Packet interface in the IDE CD driver. For this driver libscg now includes support in pre-alpha status. Use cdrecord dev=ATAPI - Starting with Linux-2.5.45, there is a new experimental ATAPI interface [...] Cdrecord allows to use this interface by calling e.g. cdrecord dev=ATA:1,0,0 [...] You want dev=ATA:x,y.z. ...but if I'm using a 2.4 kernel, even though the ATAPI interface is there (and seems to be working), I should use SCSI emulation, ie: cdrecord dev=0,0,0 ... with hdX=ide-scsi in kernel command line at boot Correct. Because quoting README.ATAPI again: All Linux ATAPI transport implementations do not support DMA. Current execptions are: - ide-scsi with block size 2048 and if DMA has been enabled - The new experimental No DMA = 100% CPU. cu andreas -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: 100% system CPU usage with cdrecord
On Fri, Jul 02, 2004 at 03:15:31PM +0200, Joerg Schilling wrote: From: Ambrose Li [EMAIL PROTECTED] But note that if you use ide-scsi on 2.4, don't try to create HFS/ISO9660 hybrid disks. Otherwise your computer will lock up when you mount your disk to verify it. [...] I would not believe this unless you give an explanation. [...] I mentioned this in a previous post. It is a kernel bug in 2.4, and from what I found at that time through Google, it has something to do with sector sizes, and the Linux developers are not interested in fixing this serious bug. In fact, you answered my posting at that time: From [EMAIL PROTECTED] Tue Oct 14 11:54:55 2003 Date: Tue, 14 Oct 2003 17:54:34 +0200 (CEST) From: Joerg Schilling [EMAIL PROTECTED] Message-Id: [EMAIL PROTECTED] To: [EMAIL PROTECTED], [EMAIL PROTECTED] Subject: Re: linux kernel error reading end of cd/dvd Return-Path: [EMAIL PROTECTED] From: Ambrose Li [EMAIL PROTECTED] (From someone who doesn't know much about CD's) I used to checksum all the files (after finding that checksumming the whole disk doesn't work -- something beyond my understanding). This stopped abruptly after I upgraded my Linux kernel to 2.4, when mounting a hfs disk started to crash the kernel. I had to simply give people disks that I could not verify as having been written correctly. If your kernel did crash, then you definitely found a kernel bug. So if I might add something to the efficiency argument, I might add that for me to checksum my disk, I'll need to checksum all the files twice (once for iso9660, once for hfs), and all this is provided that checksumming all the files would actually work (which is not the case right now). IF you write in SAO mode and your drive is not broken (use -raw96r with Lite-ON drives for this reason), then you may simply checksum the complete content of the session. The CD definitely gives you exactly the same content back that has been in the *.iso file. Jörg -- EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin [EMAIL PROTECTED] (uni) If you don't have iso-8859-1 [EMAIL PROTECTED] (work) chars I am Jorg Schilling URL: http://www.fokus.fraunhofer.de/usr/schilling ftp://ftp.berlios.de/pub/schily -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
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