Extremely slow burning in K3B
Renaud Vernet
renaud.vernet at cern.ch
Sat Aug 20 18:35:25 UTC 2005
Jim McQuiston wrote:
> Renaud Vernet wrote:
>
>
>>Jim McQuiston wrote:
>>
>
>
>>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
>
>
>>>
>>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" ?
>
> Here are the results:
>
> root at virgil:/home # hdparm -d1 /dev/hdc
>
> /dev/hdc:
> setting using_dma to 1 (on)
> using_dma = 1 (on)
>
> I cannot tell from this message whether DMA was off and I set it to on,
> or merely that it is reporting that it is on to start with. This
> command, by itself, does not appear to help my problem. Burning is still
> extremely slow.
>
> Willing to try anything at this point.
>
Ok, you manage to set dma "on", and I am not good enough to give an
explanation why it is slow.
But are you sure may burn dvd's at 48X speed ? it sound HUGE to me...
isn't it CD burning speed ?
4X is not that bad !!
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