Extremely slow burning in K3B

Renaud Vernet renaud.vernet at cern.ch
Fri Aug 19 12:17:46 UTC 2005


Jim McQuiston wrote:
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> First let me apologize for the lengthy post, however I thought it
> better to supply more information than not enough.  I am having great
> difficulties in getting K3B to burn at speeds greater than 4X despite
> have a burner capable of 48X. I have endeavored to read up on the
> issues surrounding poor burning speeds and believe that I have tackled
> issues surrounding enabling DMA and setting the SUID bit on CDRECORD.
> However, I am getting nowhere and request the sage advice of
> Ubuntu/Kubuntu users. Hopefully, I have provided comprehensive
> diagnostic information below:
> 
> root at virgil:/home # uname -a
> Linux virgil 2.6.10-5-amd64-generic #1 Fri Jun 24 16:54:18 UTC 2005
> x86_64 GNU/Linux
> 
> root at virgil:/home # cdrecord -checkdrive
> Cdrecord-Clone 2.01a38 (x86_64-unknown-linux-gnu) Copyright (C)
> 1995-2004 Joerg Schilling
> NOTE: this version of cdrecord is an unofficial (modified) release of
> cdrecord
>       and thus may have bugs that are not present in the original version.
>       Please send bug reports and support requests to
> <cdrtools at packages.debian.org>.
>       The original author should not be bothered with problems of this
> version.
> 
> cdrecord: Warning: Running on Linux-2.6.10-5-amd64-generic
> cdrecord: There are unsettled issues with Linux-2.5 and newer.
> cdrecord: If you have unexpected problems, please try Linux-2.4 or
> Solaris.
> scsidev: '1,5,0'
> scsibus: 1 target: 5 lun: 0
> cdrecord: No such file or directory. Cannot open '/dev/sg*'. Cannot
> open SCSI driver.
> cdrecord: For possible targets try 'cdrecord -scanbus'.
> cdrecord: For possible transport specifiers try 'cdrecord dev=help'.
> cdrecord:
> cdrecord: For more information, install the cdrtools-doc
> cdrecord: package and read /usr/share/doc/cdrecord/README.ATAPI.setup .
> 
> root at virgil:/home # hdparm -I /dev/hdc
> 
> /dev/hdc:
> 
> ATAPI CD-ROM, with removable media
>         Model Number:       LITE-ON LTR-48246S
>         Serial Number:
>         Firmware Revision:  SS09
> Standards:
>         Used: ATAPI for CD-ROMs, SFF-8020i, r2.5
>         Supported: CD-ROM ATAPI-2
> Configuration:
>         DRQ response: 50us.
>         Packet size: 12 bytes
> Capabilities:
>         LBA, IORDY(cannot be disabled)
>         DMA: mdma0 mdma1 mdma2 udma0 udma1 *udma2
>              Cycle time: min=120ns recommended=120ns
>         PIO: pio0 pio1 pio2 pio3 pio4
>              Cycle time: no flow control=227ns  IORDY flow control=120ns
> 
> root at virgil:/home # chmod u+s /usr/bin/cdrecord.*
> root at virgil:/home #                          
> 
> from /etc/hdparm
> 
> #/dev/discs/disc0/disc {
> #    mult_sect_io = 16
> #    write_cache = off
> #    spindown_time = 240
> #}
> 
> #/dev/discs/disc1/disc {
> #    mult_sect_io = 32
> #    spindown_time = 36
> #    write_cache = off
> #}
> 
> #/dev/cdroms/cdrom0 {
> #    dma = on           
> #    interrupt_unmask = on
> #    io32_support = 0
> #}
> 
> #/dev/hda {
> #    mult_sect_io = 16
> #    write_cache = off
> #    dma = on
> #}
> 
> #command_line {
> #       hdparm -q -m16 -q -W0 -q -d1 /dev/hda
> #}
> /dev/hdc {
> 
>     dma = on
>     interrupt_unmask = on
>     io32_support = 1
> 
> }
> /dev/hdd {
> 
>     dma = on
>     interrupt_unmask = on
>     io32_support = 1
> 
> }
> 
> # Addition by kudos unofficial kubuntu faq
> command_line {
>     hdparm -c3 -d1 -m16 /dev/[hs]d?
> }
> 
> Again, my apologies for the lengthy post.  Thank you, in advance, for
> your time and assistance.
> 
> 
> - --
>  Jim McQuiston
>  
> Registered Linux User #375957
>  "For every moment of triumph, for every instance of beauty, many
> souls must be trampeled." -- Hunter S.Thompson
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> 
You ask for dma in you /etc/hdparm, but are you sure dma is indeed enabled ?
Did you try to see what gives, typing in a terminal, "hdparm -d1 /dev/hdc" ?





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