Re: 100% system CPU usage with cdrecord
On Fri, Jul 02, 2004 at 03:15:31PM +0200, Joerg Schilling wrote:
> >From: Ambrose Li <acli@ada.dhs.org>
>
> >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 schilling@fokus.fraunhofer.de Tue Oct 14 11:54:55 2003
>Date: Tue, 14 Oct 2003 17:54:34 +0200 (CEST)
>From: Joerg Schilling <schilling@fokus.fraunhofer.de>
>Message-Id: <200310141554.h9EFsYHi005059@burner.fokus.fraunhofer.de>
>To: acli@ada.dhs.org, cdwrite@other.debian.org
>Subject: Re: linux kernel error reading end of cd/dvd
>Return-Path: <schilling@fokus.fraunhofer.de>
>
>>From: Ambrose Li <acli@ada.dhs.org>
>
>>(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:joerg@schily.isdn.cs.tu-berlin.de (home) Jörg Schilling D-13353 Berlin
> js@cs.tu-berlin.de (uni) If you don't have iso-8859-1
> schilling@fokus.fraunhofer.de (work) chars I am J"org Schilling
> URL: http://www.fokus.fraunhofer.de/usr/schilling ftp://ftp.berlios.de/pub/schily
>
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